'.
rnci ci
mm
PROGRESS REPORTS NUMBER 84-14
"
;
,
,
FISH DIVISION
DIVISION
of Fish
Fish and
and Wildlife
Wildlife
Oregon Department
Department of
1983
Studies
1983 Clam
Clam Studies
1983
CLAM STUDIES
STUDIES
1983 CLAM
by
Tom
Tom Gaumer
Gaumer INFORMATION
84-14 INFORMATION REPORT
REPORT 84-14
Oreqon Department
Department of
of Fish
Fish and
and Wildlife
Wildlife
Oreqon
Marine
Marine Region
Region Newport, Oregon
Oregon Newport,
November,
1984 November, 1984
CONTENTS
CONTENTS
P aqe
INTRODUCTION •..•......•..•......•...
INTRODUCTION
.
1
RecreationalClam
Recreational
Clam Fishery
Fishery••.•••..•.••.•.••••.••.••.•.•••..••.•..•.••••.•
...............................................
11 Ti
11 amook Bay .........................................................
TillamookBay
.......................................................
2
2 2
2
Garib&idi Flat
Garibaldi
Flat .••.•..•...•.•••.••••..•••.••.•.•..••••...••..•.•
.................................................
BayOcean
Bay
Ocean Flat
Flat ................................................
..................................................
NetartsBay
Netarts
Bat ........................................................
••.••...•..•.•..•..•.••.•.•..•.••.••••.•.•••••.••.•..•••
A
app.Y amp .....................................................
•••••••••••••••••••••••••••••••••••••••••••••••••••••
HappyCamp
CapeLookout
Cape Lookout Sand
Sand Spit
Spit ..•••••...•.••••.••••••••.••••••.••.•••••
.........................................
Nestucca
Bay .........................................................
NestuccaBay
......................................................
Little Nestucca Flat
Flat ...........................................
•.••.•••••••••.••.•.•.•••.•.••.•••••••••••.
Yaquina
Bay .........................................................
YaguinaBay
...............................................
Brid,e
Bed .....................................................
•.•••..•••••.•••.••.•••••••••.•••••.••••.••••.••••.••
BridgeBed
BreakwaterBed
Brea
water Bed ....................................................
..................................................
IdahoPoint
Idaho
Point .....................................................
................................................... .
NorthwestGas
Northwest Gas Plant
Pl ant ...........................................
.............................................
C09uille
Point ..
,. .............................................. .
Coguille Point
.................................................
Crltserts Island
Island ...............................................
................................................ .
Critser4s
AlseaBay
Alsea Bay .........................................................
...........................................................
NorthShore
North Shore ....................................................
................................................... .
Bafshore
Bayshore •.••••••.••••..•••••••••.•..•.••.•.••.•..••••.•••.•..••
.......................................................
So tshell Clam Bed
Bed ............................................
SoftshellClam
..............................................
Siuslaw Bay .......................................................
SiuslawBay
.........................................................
North
NorthFork
Fork Flat
Fl at ................................................
.••.•.•..•.••.•••••.••.....••••...•..•••..•...•.
Umpqua Estuary
...................................................... .
UmgaEstuary
.....................................................
CoosBay
Coo
s Bay............................................................
.•... "..•. ,. ..•• "•.•.•..••.. ,.,."" ..•..••• "..• " •• ,. ............ .
Hanson
s Marina
Marina ...
"............................................. .
Hanson's
................................................
Charleston Triangle ...................................................
.............................................
Charleston
Flat ...........................•....................
CharlestonFlat
................................................
Peterson Flat..................................................
................................................. .
PetersonFlat
PigeonPoint
Pigeon
Point.....................................................
........ "." .. ".... ,. ................................ .
SitkaFlat
Sitka
Flat .....................................................
................................................ ,..,. .... .
Emp;
re Flat .......
,. ................. ,. ............................ .
EmpireFlat
....................................................
North Spit .....................................................
............................................ ,. ......... .
NorthSpit
Clam
Is 1and ....................................................
..................................................... .
ClamIsland
Coquille Estuary...................................................
.................................................. .
CoquilleEstuary
I
Commercial
C1aJll Harvest
Harvest .................................................
................................................ .
CommercialClam
Commercial
Commercial Clam
Clam Fishery
Fishery by
by Mechanical
Mechanical Means
Means ........................
•••••.••••••.••.••••••••
3
3
44 44 44 44 44 4
4
4
4
5
5 55 5
5 6
6 6
6
6
6
6
6
6
6
7
7 7
7 7
7
7
7
77 7
7
77 88 8
8
8
8
8
8
8
8
8
8
88 88 9
9
99 99 Yaquina Bay....................................................
................................................... .
YaquinaBay
CoosBay
Coos
Bay .......................................................
•.••.•.•••••...••••.•••••••••••..••••.••..•••.••••.•••.
99 Commercial
by Hand
Hand ••••••..•••.••.••.••
Commercial Clam
Clam fishery
fishery by
....................................
10
10 Experimental
Fishery•..•..•.
Experimental Offshore
Offshore Clam
Clam Fishery
......................................
10
10 Special
Studies .........................................................
SpecialStudies
10 10
Hatchery
Stock Enhancement;
Enhancement; Manila
Manila Littleneck
Littleneck Clams
Clams ••••••.••••..•••
Hatchery Stock
................
10
10 Netarts
........................................................
Netarts Bay
Bay....................................................
'tTilamöok
Bay ..................................................
Ti
11 amook Bay..................................................
11 11
10 Natural Recruitment Studies •.....•.•.•...•.......•..•.•...•......•.
Natural
11
11 Yaquina
Bay...........................................................................................
YaguinaBay
....................................................
NehalemBay
Nehalem
Bay......................................................................................................
....................................................
11 11
12
12 .
Shellfish
Shellfish [icens~
License Survey•.••.•....••.••.•.....•..•.••.••.•..••.•..•
Survey ...........................................
SignRepjacement
Sign
Repl acement.........
. ..•....•.•••••. •• .••....... •..•.••.••.•..
...................................................
12
12 12
12 ACKNOWLEDGMENT ......................................................................................................
.
..........................................................
12
12 LITERATURE CITED
CITED ••••••••••••••••••••••••••••••••••
LITERATURE
........................................................
13 13
APPENDIX ................................................................
APPENDIX...............................................................................................................................
14
14 TABLES
I1At1I1
Number
Number Page
11
Peak Counts
Counts of
Peak
of Clam
Clam Diggers
Diggers .•........•••.••....••.......•.......
22
Predicted
and Actual
Actual Tidal
Tidal Heights
Heights on
on Yaquina
Yaquina Bay
Bay as
as Measured
Measured at
at Predicted and
Mark Hatfield
Hatfield Marine
Science Center,
Center, 1983
1983 •.••••.••..•.••....•.••
Marine Science
16 ....................... 16
33
.
Annual
Annual Summary
Summary of Recreational
Interview Data
Data -- Tillamook,
Tillamook, Recreational Interview
Garibaldi Flat
Garibaldi
Flat....................................................................................................
..................................................
4
4
55 66 77 Annual
Summary of
of Recreational
Recreational Interview
Interview Data
Data -- Tillamook
Tillamook Bay,
Bay,
Annual Summary
18 18
Annual
Interview Data
Data -- Netarts,
Netarts, Happy
Happy Annual Summary of Recreational
Recreational Interview
Camp
Camp...............
. ...... ...... .............. ........ ...... . .......... ...... .................................. ..........
............................................................
19
19 Annual
Data Annual Summary
Summary of
Recreational Interview
- Netarts,
Netarts, Cape
Cape of Recreational
Interview Data
Lookout
Sand Spit
Lookout Sand
Spit ....•..•.•.•••••.•.....•..••......•......•.••..
...............................................
20
20 Annual Summary
of Recreational
Recreational
Annual
Summary of
Data Interview
- Nestucca,
Nestucca, Little
Little
Interview Data
9
11
11 12
12 Idaho Point........................................................................................................
IdahoPoint
.....................................................
24 24
Annual Summary
Summary of
of Recreational
Recreational Interview
Interview Data
Data -- Yaquina,
Yaquina, Annual
Northwest
Plant.............................................
Northwest Gas
Gas Plant
.............................................
25 25
Annual Summary
Summary of
Recreational
Annual
of Recreational
Interview
Data -- Yaquina,
Yaquina, Interview Data
16
16 17
17 27
27 Alsea,
Annual
Summary of
Data -- Alsea,
Annual Summary
of Recreational
Recreational Interview Data
North
Shore.....................................................
NorthShore
.....................................................
15
15 26
26 Annual
Summary of
of Recreational
Interview Data
Yaquina,
Data -- Yaquina,
Annual Summary
Recreational Interview
Critser's Island
Critserls
Island .................................................
................................................
14
14 23
23 Annual
Interview Data
Data -- Yaquina,
Yaquina,
Annual Summary of Recreational
Recreational Interview
CoquillePoint
Co
qui 11 e Po i nt ..................................................
... "..... " ... " " . " " ................ ".. " . " . . .... " " . "
13
13 22 22
Annual
Summary of
Interview Data
Yaquina,
Annual Summary
of Recreational
Recreational Interview
Data -- Yaquina,
BreakwaterBed
Breakwater
Bed...................................................................................................
..................................................
10
10 21
21 Annual
of Recreational
Interview Data
Yaqu;na,
Data -- Yaquina,
Annual Summary
Summary of
Recreational Interview
BridgeBed
Sri
dge Bed............................................................................................................
......................................................
9
17
17 Bay
Ocean..............................................................................................................
BayOcean
.......................................................
NestuccaFlat
Ne st uc ca F1at.....................................................
.. . .. .. .. . . .. .. .. . .. .. .. .. .. .. .. . . .. .. . . .. .. .. .. .. .. . . .. .. .. . . . . .. .. .. . . .. .. .. .. . .
88 15
15 28 28
Annual
Recreational Interview
Data -- Alsea,
Alsea,
Annual Summary
Summary of
of Recreational
Interview Data
Bayshore
". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bayshore ...............
........................................................
29 29
Annual Summary
Summary of
of Recreational
Recreational Interview
Interview Data
Data -- Alsea,
Alsea,
Annual
Softshell.......................................................
Softshell ............ ".... "." ..... ".................................
30 Annual
Summary of
Recreational Interview
Interview Data
Data -- Siuslaw,
Siuslaw,
Annual Summary
of Recreational
NorthFork
......................................................
North Fork ........................
".. "............... "."""" ... ",,....
31
31 Number
Number
18
18
19
19
20
20
Page
Annual Summary
Summary of
of Recreational
Recreational Interview
Interview Data
Data -- Umpqua,
Umpqua 9
Annual
Softshell...............................................................................................................
Softshell........................................................
32
32
Annual
Summary of
of Recreational
Recreational Interview
Interview Data
Data -- Coos,
Coos 9 Hanson's
Hanson's
Annual Summary
Marina-- South
Marina
South Slough
Slough .•.•••.•.••••.•••••••.••.••••••••••..•.•.•..
............................................
33
33
Annual
Summary of
of Recreational
Interview Data
Charleston
Annual Summary
Data -- Coos
Coos,9 Charleston
Recreational Interview
T
r ; an 91e .. .........................................................
.. .. .. .. . .. .. .. . .. .. .. .. .. .. .. . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. .. .. .. .. .. .. .. .. . .. .. .. .. . ..
Triangle
21
21
Annual
Summary of
Interview Data
Data -- Coos,
Coos 9 Charleston
Charleston
Annual Summary
of Recreational
Recreational Interview
Flat .............................................................
.............................................................
22
22
23
23
24
24
Interview
Data -- Coos,
Coos, Peterson
Peterson
Interview Data
Flat................................................................................................................
Flat.............................................................
Pigeon
Interview
Data -- Coos,
Coos, Pigeon
Interview Data
Point................................................................................................................
Point............................................................
27
27
36
36
Annual Summary
Recreational
Annual
Summary of
of Recreational
37
37
Sitka
Annual
of Recreational
Interview Data
- Coos,
Annual Summary
Summary of
Data Coos, Sitka
Recreational Interview
38
Empire
Annual
Interview Data
Data -- Coos,
Annual Summary
Summary of
of Recreational
Coos, Empire
Recreational Interview
Flat.............................................................
Flat
.............................................................
26
26
35
35
Annual Summary
Recreational
Annual
Summary of
of Recreational
Flat ..............................................................
.............................................................
25
25
34
39
Annual
Interview Data
Data -- Coos,
Coos, North
North
Annual Summary
Summary of
of Recreational
Recreational Interview
Spit.............................................................
Spit..........................
.................. ...................................... .................... .
40
Annual Summary
Summary of
of Recreational
Recreational Interview
Interview Data
Data -- Coos,
Coos, Clam
Clam
Annual
Is 1and............................................................
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .•. . . . . . . . .. . .
Island
41
28
28
Annual Summary
Summary of
of Recreational
Recreational Interview
Interview Data
Data -- Coquille,
Coquille,
Annual
BandonSoftshell
Bandon
Soft she 11 •.................................................
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 42
42
29
29
Summary
Pounds of
Bay Clams
Clams Reported
Reported Harvested
Harvested in
in Oregon,
Oregon,
Summary of
of Pounds
of Bay
30
30
1970-83
1970-83...........................................................
.........................................................
43
43
Summary
Commercial Harvest
Harvest of
of Bay
Bay Clams
Clams in
in Major
Major
Summary of
of Reported
Reported Commercial
Oregon Estuaries,
Estuaries, 1969-83
1969-83•••.••••••••••••••••••.•.•••••.•.•.•••.•
Oregon
........................................
44
44
'atwJ4bi
FIGURES
Number
Number
11 Page
Age Composition
Composition of
Commercial Subtidal
Subtidal Gaper
Gaper Clam
Clam Harvest,
Harvest, Age
of Commercial
Area
2 , Yaquina
Yaquina Bay,
Bay, 1977-83
1977-83...................................
Area 2
...................................
45
45 Age
Subtidal Gaper
Gaper Clam
Clam Harvest,
Harvest, Age Composition
Composition of
of Commercial
Commercial Subtidal
Point, Coos
1975-83.................................
Pigeon
Pigeon Point,
Coos Bay,
Bay, 1975-83
.................................
46
46 Growth Curve
Curve of
of Manila
Manila Littleneck
Littleneck Clams
Clams Spawned
Spawned and
and Planted
Planted Growth
from
and Fast
Brood Stock,
Stock, Netarts
Netarts Bay,
Bay, 1974-83
1974-83..
from Normal
Normal and
Fast Growing
Growing Brood
47
47 Growth Curve
Curve of
of Manila
Manila Littleneck
Littleneck Clams
Clams Planted
Planted in
in Fenced
Fenced and
and Growth
Unfenced
and Eelgrass
Eelgrass Covered
Covered Areas
Areas of
of Netarts
NetartsBay,
Bay, 1974-83
1974-83.....
Unfenced and
.....
48
48 Summary of
Littleneck Clam
Clam Releases
Releases in
in Tillamook
Tillamook Bay,
Bay,
Summary
of Manila
Manila Littleneck
1983 ............................................................
............................................................
49 ,
22 33 44 5S 66 7
7
88 Age
Subtidal Gaper
Gaper Clams,
Clams, Area
Area 2,
2, Yaquina
Yaquina Bay,
Bay,
Age Composition
Composition of
of Subtidal
1975-83.
.. ...................... ........... .................. ...
1975-83 .........................................................
50 Distribution
and Abundance
Abundance of
Native Littleneck
Littleneck Clams
Clams in
in Distribution and
of Native
Neha
lem Bay,
Bay, 1983
1983...............................................
Nehalem
...............................................
51 51
Age Composition
Composition of
of Subtidal
Subtidal Native
Native Littleneck
Littleneck Clams,
Clams, Nehalem
Nehalem
Age
Bay,
1983.......................................................
Bay, 1983
.......................................................
52
52 1983 BAY
BAY CLAM SUMMARY
SUMMARY REPORT
REPORT INTRODUCTION
INTRODUCTION
This report
report summarizes
summarizes the
the results
results of
of our
our bay
bay clam
clam studies
studies in
in 1983.
1983.
This
Activities summarized
summarized include
include monitoring
monitoring of
of the
the recreational
recreational and
and commercial
commercial
Activities
clam fisheries,
hatchery stock
stock enhancement
enhancement studies,
studies, natural
natural recruitment
recruitment
fisheries, hatchery
studies, and
and miscellaneous
miscellaneous other
other projects.
projects.
studies,
Recreational Clam
Clam Fishery
Fishery
Recreational
on each
each of
of the
the major
major
Recreational clam
clam interviews
interviews are
are conducted
conducted annually
annually on
Recreational
clam harvesting
harvesting tideflats
tideflats of
of the
the Tillamook,
Tillamook, Netarts,
Netarts, Nestucca,
Nestucca, Yaquina,
Yaquina, Alsea,
Alsea,
clam
and
estuaries.
and Siuslaw
Siuslaw estuaries.
In 1983
added Umpqua,
Umpqua, Coos,
Coos, and
and Coquille
Coquille estuaries
estuaries
In
1983 we
we added
to our
survey agenda.
agenda.
to
our survey
Sampling of clam
clam diggers
diggers is
is usually
usually conducted
conducted by
by two
two shellfish
shellfish staff.
staff.
Sampling
A
A
count
is made
each tideflat
tideflat at
at low
low tide;
tide; this
this equates
equates to
to aa peak
peak
count of
of diggers
diggers is
made on
on each
digger count
count for
for that
that day.
day.
digger
An
effort is
is made
made to
to visit
visit each
each tideflat
tideflat at
at least
least
An effort
two
in the
and again
again in
in midsummer.
midsummer.
two times
times per
per season,
season, in
the spring and
In
In the past
past we
we
have had
had staff
and time
time to
to cover
cover the
the major
major clam
clam beds
beds 33 to
to 44 times
times per
per season.
season.
have
staff and
the harvest
harvest is
is measured
and aged.
aged. We
the height
height of
of the
the
A
sample of
A sample
of the
measured and
We measure
measure the
and length
length of
butter, gaper,
gaper, littleneck,
littleneck, and
and softshell
softshell clams.
clams.
cockle
cockle clam
clam and
of butter,
We
We
aqe the
the various
species of clams
clams by
by counting
counting annual
annual growth
growth checks
checks on
on the
the
aqe
various species
shell
surface.
shell surface.
The total
total number
number of
of annual
annual checks
checks is
;s back
back calculated
calculated to
to give
give
The
year of
of recruitment.
recruitment.
year
Our
clam interviews
interviews revealed
revealed aa slight
slight decrease
decrease in
in
Our 1983
1983 recreational
recreational clam
digging effort
the surveyed
surveyed tideflats
tideflats (Table
(Table 1).
1).
digging
effort on
on most
most of
of the
A
A part
part of
of this
this
decrease
be aa result
result of
the low
low tides
tides in
in 1983
1983 not
not being
being as
as low
low as
as
decrease might
might be
of the
predicted by
by local
local tidebooks
tidebooks (Table
(Table 2).
2),
predicted
The
higher observed
observed tidal
tidal levels
levels
The higher
occurred
along the
the entire
entire coast,
coast, as
as evidenced
evidenced by
by the
the fact
fact that
that tidal
tidal heights
heights
occurred along
averaged
30 cm (1
(1 ft)
higher than
than normal
normal at
at Tofino,
Tofino, Canada
Canada (Chettleburg
(Chettleburg
averaged 30
ft) higher
1983).
1983).
was the
the result
result of
of the
the well
well publicized
publicized El
El Niño
Nino that
that impacted
impacted the
the
This was
This
entire Pacific
entire
Pacific coast
coast in
in 1983.
1983.
May
May tides
tides in
in Vaquina
Yaquina Bay
Bay averaged
averaged 0.2
0.2 ft
ft higher
higher
than predicted
predicted as
as measured
measured at
at the
the Mark
Mark 0.
O. Hatfield
Hatfield Marine
Marine Science
Science Center.
Center.
than
June and
and July
July tides
tides averaged
averaged 0.6
0.6 ft
ft higher
higher than
than predicted,
predicted, precluding
precluding many
many
June
digQers
in traditionally
traditionally productive
productive clam
clam beds.
beds.
digqers from
from digging
digging in
Largest decreases
decreases
Largest
in
bed (625
(625 to
to 275
275 diggers)
diggers)
in peak
peak digger
digger counts
counts were
were observed
observed for
for the
the bridge
bridge bed
and Idaho
Idaho Point
(176 to
to 46
46 diggers)
diggers) on
on Yaquina
Yaquina Bay.
Bay.
and
Point (176
The bridge
bridge bed
bed is
is
The
definitely impacted
impacted by
by the
the higher
higher tide
tide levels
levels since
since the
the area
area is
is inaccessible
inaccessible
definitely
during
low tides.
tides.
during medium
medium low
An
phenomenon has
has occurred
occurred during
during the
the past
past several
several years
years in
in aa
An unexplained phenomenon
number of
of our
our estuaries.
estuaries.
number
Gaper clams
clams generally
generally occur
occur in
in greatest
greatest abundance
abundance in
in
Gaper
substrate of
of gravel,
gravel, shell
shell and
and some
some sand.
sand.
areas containing
a substrate
areas
containing a
preference applies
applies to
to both
both intertidal
intertidal and
and subtidal
subtidal stocks.
stocks.
preference
This
substrate
This substrate
Since
1975 we
we have
have
Since 1975
had
little or
gaper clams
clams in
in this
this type
type of
of substrate,
substrate.
had little
or no
no recruitment
recruitment of gaper
An
An
example of
of this
this is
is at
at the
the popular
popular Happy
Happy Camp
Camp clam
clam bed
bed in
in Netarts
Netarts Bay
Bay and
and the
the
example
Bridge
Bed in
in Yaquina
Yaquina Bay.
Bay.
Bridge Bed
On the
the other
other hand,
hand, we
we have
have evidence
evidence of
of fair
fair
recruitment in
in areas
areas containing
containing aa sand-mud
sand-mud substrate
substrate where
where gaper
gaper clams
clams are
are
recruitment
generally
in great
great abundance.
abundance.
generally not
not found
found in
Interview
included catch/effort,
digger origin,
origin, species
species
Interview data
data collected
collected included
catch/effort, digger
composition, and
and age
age and
and size
size composition.
composition.
composition,
sented
in Tables
Tables 3-28.
3-28.
sented in
These data
data are
are tabulated
tabulated and
and prepre­
These
Summaries for
for each
each tideflat
tideflat are
are presented
presented in
in the
the text
text
Summaries
and
to south.
south.
and are
are arranged
arranged by
by bay
bay from
from north
north to
Tillamook
Tillarnook Bay
Bay
Garibaldi
Flat.
Garibaldi Flat.
Catch/effort data
data revealed
revealed that
that clams/trip
clams/trip and
and clams/
clams/
Catch/effort
hour have
have remained
regulation
hour
remained relatively
relatively constant
constant since
since the
the Department's
Departments regulation
change
in 1977
1977 which
which reduced
reduced the
the bag
bag limit
limit from
from 36
36 to
to 20
20 clams.
clams.
change in
-2-2­
Cockle clams declined
declined from
from 66.6%
66.6% of
of the
the total
total recreational
recreational catch
catch in
in 1978
1978
to 24.2%
24.2% of
of the
the catch
catch in
in 1981
1981 (Table
(Table 3).
3).
to
Since
1981 the
the catch
catch has
has stabilized
stabilized
Since 1981
and the
show 27.4%
27.4% of
of the
the harvest
harvest being
being cockle
cockle clams.
clams.
and
the 1982
1982 and
and 83
83 figures
figures show
reflects aa dramatic
dramatic change
change either
either in
in cockle
cockle clam
clam availability
availability or
or digger
digger
This reflects
This
preference.
Since the
the late
late 1970's
1970's we
we believe
believe the
the harvest
harvest reduction
reduction is
is due
due to
to
Since
intertidally. Butter
clams, on
on the
the other
other hand,
hand,
aa decrease
in cockle
decrease in
cockle abundance
abundance intertidally.
Butter clams,
have increased
increased from
from 10.5%
10.5% of
of the
the harvest
harvest in
in 1977
1977 to
to 39.7%
39.7% in
in 1983.
1983.
have
Percentage
Percentage
of
harvest of
gaper clams
clams remained
remained somewhat
somewhat constant
constant during
during these
these four
four years
years
of harvest
of gaper
and
littleneck clams
show aa gradual
gradual increase
increase in
in digger
digger
and native
native littleneck
clams show
harvest.
harvest.
Mean size
size of
gaper clams
in 1983
to 107.9
107.9 nn.
mm.
Mean
of gaper
clams decreased
decreased in
1983 from
from 114.1
114.1 mm
m to
Butter
an overall
decrease in
in mean
mean size,
size, and
and mean
mean
Butter clams
clams continued
continued to
to exhibit an
overall decrease
size
littleneck clams
clams also
also decreased
decreased in
in 1983.
1983.
size of
of cockle
cockle and
and littleneck
This general
This
general
size for
for all
all four
four species
species might
might be
be aa function
function of
of El
E1 Niro
Nino and
and
decrease in
in mean
decrease
mean size
the impact
impact it
it had
had on
depressing availability
availability of
of plankton,
plankton, an
an important
important food
food
the
on depressing
item.
item.
Bay Ocean
Ocean Flat.
Flat.
Bay
Unlike
the catch/effort
catch/effort on
on Garibaldi
Garibaldi Flat,
Flat, the
the Bay
Bay Ocean
Ocean
Unlike the
clam
decline in
in clam
clam production.
production.
clam bed
bed has
has experienced
experienced a
a dramatic
dramatic decline
Catch/trip
Catch/trip
and catch/hour
have declined
steadily since
since 1976,
1976, to
to aa low
low value
value of
of less
less than
than
and
catch/hour have
declined steadily
trip in
in 1982
1982 (Table
(Table 4),
4).
0.1 animals
animals per
per trip
0.1
In 1983
this increased
increased to
to 5.7
5.7
In
1983 this
clams/trip primarily
primarily because
because of
of one
one successful
successful clam
clam digging
digging party.
party.
clams/trip
Total
Total
harvest for
11 clam
interviewed in
in 1983
1983 showed
showed 63
63 clams
clams harvested,
harvested,
harvest
for the
the 11
clam diggers
diggers interviewed
59 of
which were
were cockle
cockle clams.
clams.
59
of which
Historically,
cockle clams
clams have
have made
made up
up over
over
Historically, cockle
75% of
harvest from
from this
this bed.
bed.
75%
of the
the harvest
Local oystermen
claim aa massive
massive increase
increase in
in
Local
oystermen claim
sand
in this
area in
in recent
recent years
has been
been the
the major
major factor
factor behind
behind the
the
sand shrimp
shrimp in
this area
years has
poor digging success.
S
-3­
-3*.
Netarts
Netarts Bay
Bay
Happy Camp.
Happy
Camp.
Clam digging
digging on
on the
the Happy
Happy Camp
Camp clam
clam bed
bed continued
continued to
to be
be very
very
Clam
good in
in 1983
1983 with 10.7
10.7 clams/trip
clams/trip being
being taken
taken (Table
(Table 5).
5).
good
Since
gaper clams
clams
Since gaper
made up
up over
over 95%
95% of
of the
the harvest,
harvest. this
this success
success rate
rate suggests
suggests most
most diggers
diggers were
were
made
getting
their daily
daily bag
bag limit
limit of
of 12
12 gapers.
gapers.
gettinq their
gapers were
were of
of the
the 1975
1975 year-class.
year-class.
Nearly
harvested
Nearly 100%
100% of
of the
the harvested
The gapers
gapers averaged
averaged 101.9
101.9 mm
mm in
in size,
size. an
an
increase of
4.2 mm
mm since
since 1982.
1982.
increase
of 4.2
Cape
Lookout Sand
Sand Spit.
Spit.
Cape Lookout
Clam
using the
the Cape
Cape Lookout
Lookout sand
sand spit
spit
Clam diggers
diggers using
are interviewed
interviewed as
as they
they return
return to
to the
the Netarts
Netarts boat
boat basin.
basin.
are
As with
with Happy
Happy Camp,
Camp.
As
the Cape Lookout
Lookout sand
sand spit
spit continued
continued to
to produce
produce clams
clams at
at aa relatively
relatively constant
constant
the
rate.
rate.
Catch/trip
and catch/hour
catch/hour averaged
averaged 18.4
18.4 and
and 11.1
11.1 clams,
clams. respectively
respectively
Catch/trip and
(Table 6).
(Table
6).
As in
in previous
previous years,
years~ cockles
cockles were
were the
the principal
principal species
species collected
collected
As
representing
nearly 80%
80% of
of the
the take.
take.
representing nearly
Gaper. butter,
butter~ and
and native
native littleneck
littleneck
Gaper,
clams
up the
the remainder
remainder of
of the
the bag.
bag.
clams made
made up
Unlike
Happy Camp,
Camp. most
of the
the gaper
gaper
Unlike Happy
most of
clams (93.3%)
(93.3%) were
were of
of year-classes
year-classes younger
younger than
than 1975.
1975.
clams
The
cockle clams
clams
The cockle
in size
by the
the 1980
1980 and
and 1981
1981 year-classes.
year-classes.
averaged
averaged 69.5
69.5 mm
mm in
size and
and were
were dominated
dominated by
Nestucca Bay
Bay
Nestucca
Little Nestucca
Nestucca Flat,
Flat.
Little
After aa relatively
relatively poor
poor digging
digging year
year in
in 1981,
1981, both
both
After
1982
back up
up to
to aa respectable
respectable 29.7
29.7 and
and 28.3
28.3
1982 and
and 1983
1983 showed
showed catch/effort
catch/effort back
clams/trip
respectively (Table
(Table 7).
7).
clams/trip respectively
Softshell
clams were
were the
the only
only species
species
Softshell clams
taken and
and averaged
averaged 80.5
80.5 mm
mm in
in size.
size.
taken
Vaquina Bay
Bay
Yaguina
Bridge Bed.
Bridge
Bed.
in
1983.
in 1983.
Catch/effort for
for this
this tideflat
tideflat revealed
revealed aa dramatic
dramatic decline
decline
The
was the
the lowest
lowest ever
ever recorded
recorded and
and the
the 5.6
5.6
The 7.6
7.6 clams/trip
clams/trip was
clams/hour
also aa record
record low
low (Table
(Table 8).
8).
clams/hour was
was also
In 1983
gaper clams
clams comprised
comprised
In
1983 gaper
72% of
of the
the harvest
harvest and
and averaged
averaged 104.6
104.6 mm
mm in
in size.
size.
over
over 72%
were of
of the
the 1975
1975 year-class.
year-class.
were
Over 83%
83% of the
the gapers
gapers
Most of
of this
this fishery
fishery occurs
occurs on
on the
the gravel
gravel island
island
Most
-4­
-4-
under
101 Highway
Highway Bridge.
Bridge.
under the
the 101
As
the impact
impact of
of El
El Nino
Nino on
on
As mentioned
mentioned earlier,
earlier, the
the tidal
tidal heights
heights no
no doubt
doubt affected
affected digger
digger success
success on
on this
this tideflat.
tidef1at.
the
In
In
addition,
area has
has supported
supported one
one of
of the
the
addition, for
for the
the past
past several
several years
years this
this area
efforts of
any of
of our
our Yaquina
Yaquina Bay
Bay tideflats.
tidef1ats.
heaviest digging
heaviest
digging efforts
of any
Extremely high
high
Extremely
survival
gaper set
set provided
provided the
the digger
digger excellent
excellent
survival of
of the
the 1975
1975 year-class
year-class gaper
digging
seven years,
but the
the flat
flat in
in 1983
1983 started
started showing
showing the
the effects
effects of
of
digging for
for seven
years, but
this heavy
heavy digging
digging pressure.
pressure.
this
Breakwater
Bed.
Breakwater Bed.
Unlike the
the bridge
bridge bed,
bed, catch/effort
catch/effort on
on the
the breakwater
breakwater
Unlike
has remained
constant for
for the
the past
past several
several years
years (Table
(Table 9).
9).
has
remained relatively constant
is
limits the
digging pressure
pressure on
on this
this area.
area.
is strictly
strictly by
by boat
boat which
which limits
the digging
over 85%
85% of
of the
the clams
clams harvested
harvested were
were gaper
gaper clams.
clams.
over
mm in
in size.
size.
mm
Access
Access
In
In 1983
1983
The gapers
gapers averaged
averaged 100.7
100.7
No
single year-class
dominated the
the harvest.
harvest.
No single
year-class dominated
This
is one
one clam
clam bed
bed
This is
where some
some recruitment
recruitment of
of gaper
gaper clams
clams has
has occurred
occurred every
every year
year since
since 1975.
1975.
where
Idaho
Idaho Point.
Point.
In
In 1983
1983 there
there was
was a
a slight
slight increase
increase in
in catch/effort
catch/effort
observed
this clam
clam bed
bed (Table
(Table 10).
10). The
bed is
is subjected
subjected to
to aa very
very
observed on
on this
The clam
clam bed
intensive
86% of
the take
take is
is this
this species.
species.
intensive cockle
cockle fishery
fishery where
where over
over 86%
of the
The
The
cockles
averaged 52.6
52.6 mm,
a reduction
reduction of
of 1.8
1.8 mm
mm and
and the
the smallest
smallest mean
mean size
size
cockles averaged
mm, a
ever
for this
this tideflat.
tideflat.
ever recorded
recorded for
Since
1977, there
there has
has been
been aa gradual
gradual
Since 1977,
decrease
in mean
the cockle
suggesting possible
possible over
over harvest.
harvest.
decrease in
mean size
size of
of the
cockle suggesting
Cockles
Cockles
of the
the 1980
1980 and
and 1981
1981 year-classes
year-classes were
were dominant
dominant in
in the
the 1983
1983 harvest.
harvest.
of
Northwest Gas
Gas Plant.
Plant.
Northwest
The harvest
harvest of
of clams
clams from
from this
this clam
clam bed
bed showed
showed aa
The
remarkable
in 1983
1983 more
more than
than doubling
doubling that
that recorded
recorded in
in
remarkable upturn
upturn in
in catch/effort
catch/effort in
1982
(Table 11).
11).
1982 (Table
in
1982.
in 1982.
Clam diggers averaged
averaged 9.5
9.5 clams/trip
clams/trip in
in 1983
1983 compared
compared to
to 4.5
4.5
that over
over 84%
84% of
of the
the clams
clams
Species
data revealed
revealed that
Species composition
composition data
clams, averaging
averaging 57.0
57.0 mm
mm in
in size,
size, an
an increase
increase of
of 6.8
6.8 mm
mm
harvested
harvested were
were cockle
cockle clams,
since
1982.
since 1982.
The
primarily on
on two
two year-old
year-old cockles;
cockles; over
over 58%
58% were
were
The fishery
fishery was
was primarily
of
the 1981
1981 year-class.
year-class.
of the
The first
first occurrence
occurrence of
of aa stronq
stronq showing
showing of
of native
native
The
-5-5­
littlenecks
13.7% of
the take
take this
this species.
species.
littlenecks was
was also
also observed
observed with
with 13.7%
of the
Littlenecks
averaged 45.8
45.8 nm
mm in
in size.
size.
Littlenecks averaged
Coquille Point.
Point.
Coguille
This
is starting
starting to
to experience
experience more
more digging
digging
This tideflat
tideflat is
the poor
poor digging
digging on
on other
other Yaquina
Yaquina Bay
Bay tideflats.
tideflats.
pressure,
pressure, perhaps
perhaps because
because of
of the
Catch/effort has
has improved
improved since
since 1981
1981 with
with 5.4
5.4 clams/trip
clams/trip being
being taken
taken (Table
(Table
Catch/effort
12).
12).
were the
the principal
principal species
species recorded
recorded comprising
comprising over
over 40%
40% of
of
Butter
Butter clams
clams were
the
take.
the take.
In 1982,
the clams
harvested were
were gaper
gaper clams,
clams.
In
1982, 93%
93% of
of the
clams harvested
The butter
butter
The
clams
averaged 74.9
74.9 nm
mm in
in size.
size.
clams averaged
Critser!s
Critser's Island.
Island.
In 1983
added an
an important
important softshell
softshell clam
clam digging
digging
In
1983 we
we added
area
in Yaquina
Yaquina Bay
Bay to
to our
our surveys.
surveys.
area in
We interviewed
interviewed 42
42 clam
clam diggers
diggers that
that
We
caught an
an average
average of
32.9 softshells/digger
softshells/digger (Table
(Table 13).
13).
caught
of 32.9
The
averaged
The clams
clams averaqed
mm in
82.5
82.5 nmii
in size.
size.
Alsea
Bay
Alsea Bay
Alsea
added to
to our
our sampling
sampling program
program in
in 1982.
1982.
Alsea Bay
Bay was
was added
surveyed;
North Shore
Shore and
and Bay
Bay Shore.
Shore.
surveyed; North
Two
areas were
were
Two areas
In
digging
In 1983
1983 we
we added
added a
a softshell
softshell digging
area.
area.
North Shore.
Shore.
North
Three
diggers were
were interviewed
interviewed and
and they
they averaged
averaged 7.3
7.3
Three diggers
cockles/digger (Table
(Table 14).
14).
cockles/digger
1982.
1982.
This was
was aa reduction
reduction of
of 10.5
10.5 clams/digger
clams/digger since
since
This
The
cockles were
were also
also smaller
smaller in
in 1983
1983 averaging
averaging 71.0
71.0 nm
mm in
in size
size and
and
The cockles
were primarily
primarily four-year-old
four-year-old clams
clams (1979
(1979 year-class).
year-class).
were
The
North Shore
Shore flat
flat is
is
The North
located directly
under the
the Alsea
bridge on
on the
the north
north side
side of
of the
the estuary.
estuary.
located
directly under
Alsea bridge
Bayshore.
Bayshore.
We
interviewed 24
24 diggers
diggers on
on this
this tideflat
tideflat and
and they
they averaged
averaged
We interviewed
13.2
3.3 clams/digger
clams/digger since
since 1982
1982 (Table
(Table 15).
15).
13,2 clams/digger,
clams/digger, a
a decrease
decrease of
of 3.3
99% of
the clams
clams taken
taken were
were cackles
cockles that
that averaged
averaged 76.4
76.4 nm.
mm.
99%
of the
clams
clams were
were of
of the
the 1979
1979 year-class.
year-class.
Over
Over
Over
60% of
of the
the
Over 60%
This
fishery occurs
primarily subtidally
subtidally
This fishery
occurs primarily
with clams
clams taken
taken with
with long
long handled
handled rakes
rakes made
made out
out of
of modified
modified pitch
pitch forks.
forks.
with
-6­
-6-
Softshe11
Clam Bed.
Bed.
Softshell Clam
The
softshe11 clam
clam diggers
diggers averaged
averaged 22.8
22.8
The softshell
from this
this tideflat
tidef1at (Table
(Table 16).
16).
clams/person
clams/person from
The
clams averaged
averaged96,8
96.8rmii
mm in
in
The clams
size which
is considerably
larger than
than for
for those
those measured
measured in
in Nestucca,
Nestucca,
size
which is
considerably larger
and Siuslaw
Siuslaw bays.
bays.
Yaquina,
Yaquina, and
Bay
Siuslaw Bay
Siuslaw
North
Fork Flat,
Flat.
North Fork
Clam
digging continues
continues to
to be
be excellent
excellent on
on this
this clam
clam bed
bed
Clam digging
where
information revealed
revealed over
over 35
35 clams/trip
clams/trip taken
taken (Table
(Table 17).
17).
where catch/effort
catch/effort information
Only
taken from
from this
this area
area and
and they
they averaged
averaged 92.8
92.8 mm
mm in
in
Only softshel1
softshell clams
clams were
were taken
size.
size.
Although
digging pressure
pressure is
is very
very heavy
heavy in
in this
this area,
area, little
little impact
impact
Althoigh the
the digging
has
availability or
or size
size of
of the
the clams.
clams.
has been
been observed
observed on
on the availability
Umpqua Estuary
Estuary
Umpgua
We added
added the
the Umpqua
Umpqua estuary
estuary to
to our
our sampling
sampling program
program in
in 1983
1983 due
due to
to its
its
importance
a softshell
softshe11 clam
clam producer.
producer.
importance as
as a
Although
sampling effort
effort was
was
Although our
our sampling
small,
data revealed
revealed diggers
diggers getting
getting their
their limit
limit of
of 36
36 clams
clams
small, catch/effort data
(Table
18).
(Table 18).
Coos Bay
Bay
Coos
Nine clam
clam digging
ares in
in Coos
Coos Bay
Bay were
were added
added to
to our
our sampling
sampling program
program in
in
Nine
digging ares
1983.
1983.
Sampling
in the
the future
future will
will depend
depend on
on availability
availability of
of man
man power.
power.
Sampling effort
effort in
Hanson's
Marina.
Hanson's Marina.
The
six diggers
diggers sampled
sampled averaged
averaged 16.8
16.8 clams/trip
clams/trip and
and
The six
22.4 clams/hour
clams/hour (Table
(Table 19).
19).
22.4
Species
figures revealed
revealed that
that over
over
Species composition
composition figures
69%
species taken
taken were
were gaper
gaper clams.
clams.
69% of
of the
the species
Butter, cockle,
cockle, and
and native
native
Butter,
littleneck
also taken.
taken.
littleneck clams
clams were
were also
Charleston
Triangle.
Charleston Triangle.
19.3
(Table 20).
20).
19.3 clams/trip
clams/trip (Table
We interviewed
interviewed 40
40 clam
clam diggers
diggers and
and they
they averaged
averaged
We
Over 55%
55% of
of the
the clams
clams harvested
harvested were
were cockle
cockle clams
clams
Over
with butter
butter and
and native
native littleneck
littleneck clams
clams well
well represented
represented in
in the
the harvest.
harvest.
with
cockle
clams averaged
averaged 51.2
51.2 mm
mm in
in size.
size.
cockle clams
-7­
The
The
Charleston Flat.
Charleston
Flat.
Sixty interviewed
interviewed clam
clam diggers
diggers averaged
averaged 14.3
14.3
Sixty
clams/digger
clams/digger (Table
(Table 21).
21).
Cockle and
and gaper
gaper clams
clams were
were the
the principal
principal species
species
and averaged
averaged 59.9
59.9 mm
and 100.6
100.6 mm,
mm, respectively.
respectively.
taken and
taken
nn and
Peterson
Flat.
Peterson Flat.
(Table 22).
(Table
22).
Clam diggers
diggers on
on Peterson
Peterson Flat
Flat averaged
averaged 19.6
19.6 clams/trip
clams/trip
Clam
Gaper
the principal
principal species
species taken
taken followed
followed by
by native
native
Gaper clams
clams were
were the
littleneck
littleneck and
and cockle
cockle clams.
clams.
Pigeon Point.
Point.
Pigeon
No measurements were
were taken
taken from
from the
the clams.
clams.
No
We interviewed
interviewed 65
65 diggers
diggers and
and they
they averaged
averaged 15.4
15.4
We
clams/trip (Table
(Table 23).
23).
clams/trip
Gaper
and butter
butter clams
clams were
were the
the principal
principal species
species
Gaper and
taken
accounting for
for 51.4
51.4 and
and 32.0%
32.0% of
of the
the harvest,
harvest, respectively.
respectively.
taken accounting
Sitka Flat.
Flat.
The 46
46 interviewed
interviewed clam
clam diggers
diggers averaged
averaged 14.7
14.7 clams/trip
clams/trip
from
this clam
clam bed
bed (Table
(Table 24).
24).
from this
The
gaper clam
was the
the most
most frequently
frequently taken
taken
The gaper
clam was
species making
up 50.9%
50.9% of
of the
the harvest.
harvest.
species
making up
Empire
Empire Flat.
Flat.
25).
25).
The
gapers averaged
averaged 108.0
108.0 nii
mm in
in size.
size.
The gapers
Clam
Empire Flat
Flat averaged
averaged 15.1
15.1 clams/trip
clams/trip (Table
(Table
Clam diggers
diggers on
on Empire
Gaper
comprised 58.8%
58.8% of
of the
the harvest.
harvest.
Gaper clams
clams comprised
North
North Spit.
Spit.
We
interviewed 65
65 clam
clam diggers
diggers on
on North
North Spit
Spit and
and they
they
We interviewed
averaged
(Table 26).
26).
averaged 10.7
10.7 clams/trip
clams/trip (Table
Gaper
clams were
were the
the principal
principal species
species
Gaper clams
taken
accounting for
75.3% of the
the harvest.
harvest.
taken accounting
for 75,3%
The
gapers averaged
averaged 109.6
109.6 mm
in
The gapers
mm in
size.
size.
Clam Island.
Clam
Island.
The 57
57 interviewed
interviewed clam
clam diggers
diggers averaged
averaged 17.6
17.6 clams/trip
clams/trip
The
from this
this clam
clam bed
bed (Table
(Table 27).
27).
from
Gaper
and cockle
clams were
were the
the principal
principal
Gaper and
cockle clams
species taken
taken making
up 54.2
54.2 and
and 36.5%
36.5% of
of the
the harvest,
harvest, respectively.
respectively.
species
making up
The
The
gapers and
and cockles
cockles averaged
averaged 107.7
107.7 and
and 54.1
54.1 nui
mm in
gapers
in size,
size, respectively.
respectively.
Coquille
Coquille Estuary
Estuary
The Coquille
Coquille estuary
estuary was
was the
the most
most southern
southern estuary
estuary surveyed
surveyed for
for clam
clam
The
diggers.
diggers.
The diggers
diggers averaged
averaged 35.8
35.8 clams/trip;
clams/trip; all
all were
were softshells
softshells (Table
(Table
The
28).
28).
-8­
Commercial
Commercial Clam
Clam Harvest
Harvest
In
In 1983,
1983, there
there were
were 136,185
136,185 pounds
pounds of
of clams
clams reported
reported to
to be commercially
harvested in
in Oregon's
Oregon1s estuaries
estuaries (Table
(Table 29).
29).
harvested
(69.8%) were
gaper clams.
clams.
(69.8%)
were gaper
total gaper
total
gaper harvest.
harvest.
Of this
this total,
total, 95,091
95,091 pounds
pounds
Of
Coos
Bay produced
produced 89,682
89,682 pounds
pounds (94.3%)
(94.3%) of
of the
the
Coos Bay
Other
harvested coastwide
coastwide were
were native
native littlenecks
littlenecks
Other clams
clams harvested
(34,444
lbs), cockles
(2,579 ibs),
lbs), and
and softshells
softshells (36
(36
(34,444 lbs).
lbs), butters
butters (4,035
(4,035 lbs),
cockles (2,579
lbs).
ibs).
Thirty-seven
reported landings
landings in
in 1983,
1983, nine
nine less
less than
than in
in
Thirty-seven fishermen
fishermen reported
1982.
1982.
Eight
hundred eleven
landings were
were made
made in
in 1983,
1983, 273
273 more
more than
than in
in 1982.
1982.
Eight hundred
eleven landings
Coos
Bay produced
produced the
the most
clams in
in 1983
1983 with
with 95,717
95,717 lbs
lbs reported
reported (Table
(Table
Coos Bay
most clams
Nehalem,
and Tillamook
bays produced
produced 31,856
31,856 lbs,
lbs, 5,253
5,253 lbs,
lbs, and
and
Nehalem, Yaqu;na,
Yaquina, and
Tillamook bays
30).
30).
3,144
3,144 lbs,
lbs, respectively.
respectively.
Netarts and
and Siuslaw
Siuslaw bays
bays produced
produced minor
minor poundages
poundages of
of
Netarts
clams.
clams.
Commercial
Means
Commercial Clam
Clam Fishery
Fishery by
by Mechanical
Mechanical Means
Yaquina
Bay.
Yaquina Bay.
One commercial
commercial clam
clam harvesting
harvesting permit
permit was
was issued
issued for
for
One
Yaquina
Bay in
in 1983.
1983.
Yaquina Bay
permit.
permit,
During the
the year
year 4,940
4,940 pounds
pounds of
of gaper
gaper clams
clams were
were taken
taken under
under permit
permit
During
from
the bay.
bay.
from the
$0.18/lb.
$0.18/lb.
Three
fishermen harvested
harvested and
and landed
landed clams
clams under
under this
this
Three fishermen
Fishermen
averaged 823 lbs/trip
lbs/trip and
and they
they received
received an
an average
average of
of
Fishermen averaged
The gaper
gaper clams
clams averaged
averaged 116.0
116.0 mm
mm in
in size
size and
and were
were primarily
primarily of
of the
the
The
1975
1975 and
ann 76
76 year-classes
year-classes (Figure
(Figure 1).
1).
Coos Bay.
Bay.
Coos
We
issued six
six commercial
commercial clam
clam harvesting
harvesting permits
permits for
for Coos
Coos Bay
Bay
We issued
in 1983;
seven were
were issued
issued in
in 1982.
1982.
in
1983; seven
Of the
the six
six permits
permits issued,
issued, four
four were
were used
used
Of
and
in aa production
66,906 pounds
pounds of
of
and resulted
resulted in
production of
of 66,906
clams.
clams.
Of the
the 66,906
66,906
pounds
(94.2%) were
were gaper
gaper clams.
clams. Fishermen
Fishermen averaged
averaged
pounds harvested,
harvested, 63,045
63,045 pounds
pounds (94.2%)
291
lbs/trip and
$0.32/lb.
291 lbs/trip
and received
received an
an average of $0.32/lb.
The gaper
gaper clams
clams harvested
harvested in
in the
the permit
permit area
area averaged
averaged 137.2
137.2 mm
mm in
in size
size
The
and
primarily of
1973, 74
74 and
and 75
75 year-classes
year-classes (Figure
(Figure 2).
2).
and were
were primarily
of the
the 1973,
harvested
in 1982
1982 from
from the
the same
same area
area averaged
averaged 134.2
134.2inn
mm in
in size.
size.
harvested in
younger than
than the
the 1978
1978 year-class
year-class were
were observed.
observed.
younger
-9­
Clams
Clams
No
No clams
clams
Commercial
by Hand
Commercial Clam
Clam Fishery
Fishery by
Hand
Commercial
clam fishermen
fishermen harvested
harvested aa reported
reported 64,339
64,339 lbs
lbs of
of clams
clams by
by
Commercial clam
hand in
in Oregon's
Oregon's estuaries
estuaries in
in 1983.
1983.
hand
Many of
these clams
clams were
were taken
taken in
in
Many
of these
Coos
and Nehalem
Nehalem bays
bays where
where aa reported
reported 28,811
28,811 lbs
lbs and
and 31,856
31,856 lbs,
lbs, respecrespec­
Coos and
tively, were
were taken.
taken.
tively,
The Coos
Coos Bay
Bay landings
landings were
were primarily
primarily subtidal
subtidal gapers
gapers
The
whereas
the Nehalem
Nehalem Bay
Bay landings
landings were
were entirely
entirely subtidal
subtidal native
native littlenecks.
littlenecks.
whereas the
The
littlenecks brought
$1.00 to
to $1.15/pound
$1.15/pound to
to the
the fishermen.
fishermen.
The littlenecks
brought $1.00
Clam Fishery
Fishery
Experimental Offshore
Offshore Clam
Experimental
In
a commercial
commercial fishermen
fishermen to
to mechanically
mechanically
In 1983
1983 we
we issued
issued one
one permit
permit to
to a
explore
and harvest,
harvest, clams
clams off
off the
the southern
southern Oregon
Oregon coast.
coast.
explore for,
for, and
No
landings
No landings
were
in 1983
1983 for
for this
this permit
permit holder.
holder.
were reported
reported in
Special
Studies
Special Studies
Hatchery Stock
Stock Enhancement:
Enhancement; Manila
Manila Littleneck
Littleneck Clams
Clams
Hatchery
Netarts Bay.
Bay.
Netarts
We
continued to
to monitor
monitor the
the growth
growth characteristics
characteristics of
of
We continued
Manila littleneck
littleneck clams
clams that
that were
were selected
selected for
for their
their fast
fast growing
growing ability
ability vs.
vs.
Manila
normal growing
growing clams
clams (Gaumer
(Gaumer and
and Lukas,
Lukas, 1975).
1975).
normal
We
also compared
compared growth
growth of
of
We also
clams
in aa screened
screened vs.
vs. unscreened
unscreened area.
area.
clams in
Results
showed that
that clams
clams spawned
spawned in
in August
August 1974
1974 from
from fast
fast growing
growing parent
parent
Results showed
stock
the past
past year
year and
and actually
actually were
were 0.3
0.3 mm
mm smaller
smaller than
than
stock did
did not
not grow
grow during
during the
the
sampled in
in 1982.
1982.
the clams
clams sampled
They averaged
averaged 42.8
42.8 mm
mm in
in size
size whereas
whereas progeny
progeny from
from
They
"normal"
averaged 41.7
41.7 mm
mm (Figure
(Figure 3).
3).
"normal" clams
clams grew
grew 1.9
1.9 mm
mm and
and averaged
Manila
clams planted
planted in
in the
the fenced
fenced test
test plot
plot averaged
averaged 40.7
40.7 mm,
mm, an
an
Manila clams
increase
clams planted
planted in
in an
an adjacent
adjacent fenced
fenced
increase of
of 0.3
0.3 mm
mm since
since 1982,
1982, whereas
whereas clams
test
2.4 mm.
mm. Manilas
Manilas planted
planted adjacent
adjacent to
to
test plot
plot averaged
averaged 40.2
40.2 mm,
mm, a
a decrease
decrease of
of 2.4
an
lower elevation
were 44.0
44.0 mm
mm in
in mean
length,
an eelgrass
eelgrass bed
bed and
and at
at a
a slightly
slightly lower
elevation were
mean length,
-10-10­
aa decrease
4.0 mm
mm since
since 1982
1982 (Figure
(Figure 4).
4).
decrease of
of 4.0
averaged 13.1
averaged
13.1 mm when
when released.
released.
Clams
in all
all three
three test
test plots
plots
Clams in
The
decrease in
in mean
mean size
size might
might be
be the
the
The decrease
results of
larger clams
clams in
in the
the original
original releases
releases starting
starting to
to die
die of
of old
old age.
age.
results
of larger
new study
study was
started in
in June
June 1982,
1982, in
in Netarts
Netarts Bay,
Bay, where
where 18,000
18,000 Manila
Manila
A
A new
was started
littleneck
long, were
planted in
in aa fenced
fenced test
test plot
plot at
at
littleneck clams,
clams, averaging
averaging 6.9
6.9 mm
mm long,
were planted
a
density of
a density
of 180/ft2.
180/ft2.
These
progeny of
of adults
adults collected
collected from
from the
the
These clams
clams were
were progeny
in 1981
and spawned
spawned and
and reared
reared in
in the
the OSU
OSU laboratory
laboratory by
by
Netarts
Netarts test
test area
area in
1981 and
Wilbur Breese.
Breese.
Wilbur
By June
planted clams
clams averaged
averaged 22.5
22.5 mm
mm in
in size,
size, an
an
June 1983 the planted
increase
3.8 clams/ft2,
clams/ft2, giving
giving aa survival
survival rate
rate of
of
increase of
of 15.6
15.6 mm,
mm, and
and averaged
averaged 3.8
2.1%.
2.1%.
Tillamook
Bay.
Tillamook Bay.
Tillamook
Bay.
Tillamook Bay,
We
continued our
studies on
on clam
clam introductions
introductions into
into
We continued
our studies
During the
the year
year approximately
approximately 11,000
11,000adLilt
adult Manila
Manila littleneck
littleneck
During
clams were
were imported
imported from
from Washington
Washington and
and released
released in
in test
test plots
plots (Figure
(Figure 5).
5).
clams
In
In
addition,
and 10,000
10,000 1983
1983 year-class
year-class juvenile
juvenile Manila
Manila
addition, 2,000,000 1982 year-class and
clams, produced
produced under
under laboratory
laboratory conditions
conditions at
at Oregon
Oregon State
State University,
University, were
were
clams,
placed in
in the
the bay.
bay.
placed
of 1982
1982 year-class
year-class Manila
Manila clams
clams released
released in
in March
March 1983
1983 showed
showed
A sample
sample of
A
the
averaged 14.1
14.1 mm
long in
in February
February 1984.
1984.
the clams
clams averaged
mm long
Survival was
was poor
poor at
at 0.4%
0.4%
Survival
of the
the original
original release.
release.
of
Natural
Studies
Natural Recruitment
Recruitment Studies
Yaguina Bay.
Yaquina
Bay.
We collected
collected 20
20 subtidal
subtidal dredge
dredge samples
samples from
from Area
Area 22 of
of
Yaquina Bay
Bay in
in October
1983 to
to determine
determine year-class
year-class strength
strength and
and recruitment
recruitment
Yaquina
October 1983
success.
success.
2 of
of surface
Each
1 ft
surface area;
area; depth
depth of
of samples
samples averaged
averaged
Each sample
sample covered 1
ft2
12-14
inches.
12-14 inches.
The 20
20 samples
samples produced
produced 191
191 gaper
gaper clams
clams (9.6/ft2)
(9.6/ft 2) that
that averaged
averaged 106.5
106.5 mm
mm
The
in length.
length.
in
No recruitment
gaper clams
clams was
was recorded
recorded for
for the
the 1980-83
1980-83 year
year
No
recruitment of
of gaper
classes (Figure
(Figure 6).
6).
classes
-11-11­
Nehalern Bay.
Bay.
Nehalem
In May
42 subtidal
subtidal dredge
dredge samples
samples to
to determine
determine
In
May we
we collected
collected 42
distribution
and abundance
abundance of native
native littleneck
littleneck clams
clams in
in aa 14.7
14.7 acre
acre area
area
distribution and
(Figure
7).
(Figure 7).
fishery.
fishery.
The
clam
The survey
survey area
area included
included the
the site
site of
of an
an ongoing
ongoing commercial
comercial clam
Each sample
sample covered
covered 22 ft2
ft2 of
of surface
surface area;
area; depth
depth of
of samples
samples averaged
averaged
Each
12
inches.
12 inches.
in
We
collected 670
670 littleneck
littleneck clams
clams (8.O/ft2)
(8.0/ft 2 ) that
that averaged
averaged 36.9
36.9 nm
mm in
We collected
length.
length.
Population estimates revealed
revealed that
that 5,100,000
5,100,000 million
million littleneck
littleneck clams
clams
Population
pounds inhabited
inhabited the
the site.
site.
weighing
268,000 pounds
weighing 268,000
Age
Age composition
composition data
data show
show
consistent recruitment
recruitment in
in the
the area
area with
with 2-5
2-5 year
year old
old clams
clams well
well represented
represented in
in
consistent
8).
the
sample (Figure
(Figure 8).
the sample
Shellfish License
License Survey
Survey
Shellfish
While
interviewing bay
bay clam
clam diggers,
diggers, we
we asked
asked several
several questions
questions to
to
While interviewing
provide Department
Department economists
economists with
with background
background information
information for
for aa future
future request
request
provide
for
a shellfish
shellfish license.
license.
for a
The 859
859 clam
clam diggers
diggers interviewed
interviewed made
made 3,826
3,826 trips
trips to
to
and averaged
averaged 4.5
4.5 trips
trips in
in 1982;
1982; 10.7%
10.7% of
of the
the diggers
diggers were
were less
less than
than
dig clams
clams and
dig
14
of age.
age.
14 years
years of
Of
diggers, 53.7%
53.7% had
had purchased
purchased an
an angling
angling license
license
Of the total
total diggers,
in
1982.
in 1982.
Sign Replacement
Replacement
Sign
In
a coastwide
coastwide project
project of
of repairing
repairing or
or
In 1983
1983 the
the shellfish
shellfish staff
staff continued
continued a
replacing
regulation signs.
signs.
replacing regulation
Most of
of the
the signs
signs south
south of
of Tillamook
Tillamook Bay
Bay were
were
Most
inspected and
and 121
121 were
were repaired
repaired or
or replaced.
replaced.
inspected
An estimated
estimated 50
50 additionaladditional­
An
repairs
are needed
needed to
to bring
bring the
the signs
signs up
up to
to date.
date.
repairs or
or replacements
replacements are
ACKNOWLEDGMENT
ACKNOWLEDGMENT
I wish
Jean McCrae
McCrae and
and Rick
Rick Starr
Starr for
for their
their
I
wish to
to thank
thank Darrell
Darrell Demory,
Demory, Jean
assistance
that was
was used
used in
in this
this report.
report.
assistance in
in gathering
gathering the
the data that
-12-12­
LITERATURE
CITED LITERATURE CITED
Chettleburg.
Peter.
Chettleburq, Peter.
No.2.
No. 2.
1983.
1983.
Effects
El Ntho.
Nino. Western
Fisheries.
Effects of
of El
Western Fisheries.
Vol. 109.
Vol.
109.
Gaumer. Thomas
Lukas. 1975.
Methods of
of Supplementing
Supplementing Clam
Clam and
and
Gaurner,
Thomas F.
F. and
and Gerald
Gerald Lukas.
1975.
Abalone
Production. Comm.
and Devel.
Devel. Act.
Act. July
July 1,
1. 1974
1974 to
to
Abalone Production.
Comm. Fish.
Fish. Res.
Res. and
June 30,
30, 1975.
1975. Fish
Comm. of
of Ore.
Ore. Proc.
Proc. Rept.
Rept. 35
35 pp.
pp.
Fish Corn.
June
-13-13­
APPENDIX APPENDIX
-14­
-14-
Table 1.
Table
1.
Peak
Oiggers~. Peak Counts
Counts of
of Clam
Clam Diggers1!
Estuar,l
Estuary
Tideflat
Tideflat
Tillamook
Tillamook
Garibaldi Flat
Flat
Garibaldi
Bay Ocean
Ocean
Bay
1975 T976
1975
1976
425
425
1981
1980 1981
1977
1978 1979
19771978
1979 1980
-
350
350
280
280
131
131
122
122
73
73
300
300
-
460
460
33
33
516
516
13
13
487
487
10
10
150
150
160
160
425
425
500
500
478
478
-
-
-
44
44
6
6
12
12
30
30
62
62
45
45
91
91
23
23
66
66
24
24
17
17
84
84
20
20
61
61
26
26
18
18
225
225
27
27
38
38
41
41
45
45
625
625
63
63
176
176
16
16
41
41
275
275
26
26
46
46
12
12
20
20
Happy Camp
Camp
Happy
-
175
175
Nestucca
Nestucca
Little
Nestucca
Little Nestucca
-
-
-
Yaquina
Yaquina
Bridge
Bed
Bridqe Bed
Breakwater Bed
Bed
Breakwater
Idaho Point
Point
Idaho
NW
Plant
NW Gas
Gas Plant
Coqui
lle Point
Point
Coquille
-
245
245
127
127
110
110
138
138
120
120
98
98
-
-
-
-
-
-
-
-
Alsea
Alsea
Siuslaw
Siuslaw
11
1/
-
1983
1983 256
256
107
107
225
225
39
39
Netarts
Netarts
-
1982
1982
Beach
North Beach
North
Bay Shore
Shore
Bay
-
-
-
-
-
-
-
44
-
-
-
-
-
-
-
49
49
3
3
31
31
Fork
North Fork
North
-
55
55
-
-
109
109
146
146
33
33
22
22
57
57
Number of
of clam
clam diggers
diggers actually
actually on
on tideflat
tideflat at
at time
time of
of count.
count.
Number
at or
near low
low tide.
tide.
at
or near
-15­
Count
occurred
Count occurred
Table 2.
2.
Table
as Measured
Measured
Predicted and
and Actual
Actual Tidal
Tidal Heights
Heights on
on Yaquina
Yaquina Bay
Bay as
Predicted
1983.
at
Hatfield Marine
Marine Science
Science Center,
Center, 1983.
at Mark
Mark Hatfield
Predicted
Tide
Predicted Tide
(OSU tide
tide book)
bookl
(OSU
Date
Date
Measured
Ti de
Measured Tide
(at
(at MSC)
MSq
Difference
Difference
Average
Average
( ft)
(ft)
( ft)
(ft)
-1.0
-1.0
-1.6
-1.6
-2.0
-2.0
-2.1
-2.1
-2.0
-2.0
-1.7
-1. 7
-1.2
-1.2
-0.9
-0.9
-1.4
-1.4
-1.8
-1.8
-1.8
-1.8
-1.8
-1.6
-1.3
+0.1
+0.1
+0.2
+0.2
+0.2
+0.2
+0.3
+0.3
+0.2
+0.2
+0.1
+0.1
+0.1
+0.1
+0.2
+0.2
11
June
June 11
12
12
13
13
14
14
15
15
16
16
-2.4
-2,4
-2.7
-2.7
-2.7
-2.7
-2.4
-2.4
-1.9
-1.9
-1.3
-1.3
-1.8
-2.2
-2.2
-2.2
-2.2
-1.77
-1.
-1.6
-1.6
-0.6
-0.6
+0.6
+0.6
+0.5
+0.5
+0.5
+0.5
+0.7
+0.7
+0.3
+0.3
+0.7
+0.7
+0.6
+0.6
July
8
July 8
99
-1.5
-1.5
-2.3
-2.3
-2.7
-2.7
-2.9
-2.9
-2.8
-2.8
-2.4
-2.4
-1.7
-1.7
-0.8
-0.8
+0.7
+0.7
+0.6
+0.6
+0.4
+0.4
+0.3
+0.3
+0.7
+0.7
+0.9
+0.9
+0.7
+0.7
+0.6
+0.6
May
12
May 12
13
13
14
14
15
15
16
16
17
17
18
18
10
10
11
11
12
12
13
13
14
14
-1.7
-1. 7
-2.3
-2.3
-2,6
-2.6
-2.1
-2.1
-1.5
-1.5
-1.0
-16­
Table
Table 3.
3.
ANNUAL
SUMMARY OF
OF RECREATIOF'kL
RECREATIONhL INTERVIEW
ANNUAL SUF1ARY
INTERVIEW DATA
DATA
Bay:
Bay: Tillarrook
Tillanak
No. Diggers
Diggers Sampled
Sampled
No.
No. Clams
Clams Sampled
Sampled
No.
No. Digger
Digger Hours
Hours
No.
Hours/trip
I-bursltr i p
Clams/trip
Clams/trip
Clans/hour
Clais/hour
Digger
Digger origin
origin (%)
(%)
I
......
'-J
I
Tideflat:
Garibaldi Flat
Flat
Tideflat: Garibaldi
1962
1962
1963
1963
1965
1965
1971
1971
1975
1975
1976
1976
1
1/
1977
1977
149
149
3,296
3,296
758
758
19,053
19,053
319
319
8,414
8,414
13,048
13,048
389,946
389,946
20,439
20,439
1.6
1.6
29.9
29.9
19.1
19.1
104
104
2,472
2,472
207
207
4,825
4,825
283.2
283.2
1.4
1.4
23.3
23.3
17.0
17.0
252
252
4,647
4,647
335.8
335.8
1.3
1.3
18.4
18.4
13.8
13.8
239
239
4,631
4,631
261.1
261.1
1.1
1.1
19.4
19.4
17.7
17.7
597
597
11,104
11,104
715.2
715.2
1.2
1.2
18.6
18.6
15.5
15.5
456
456
8,728
8,728
548.9
548.9
1.2
1.2
19.1
19.1
15.9
15.9
359
359
6,558
6,558
443.3
443.3
1.2
1.2
18.3
18.3
14.0
14.0
219
219
4,249
4,249
219.5
219.5
1.3
1.3
19.4
19.4
14.6
14.6
132
132
2,471
2,471
158.0
158.0
1.2
1.2
18.7
18.7
15.6
15.6
32.9
32.9
57.0
57.0
27.8
27.8
57.3
57.3
33.1
33.1
55.2
55.2
30.2
30.2
64.7
64.7
22.4
22.4
72.6
72.6
27.6
27.6
63.5
63.5
38.8
38.8
57.1
57.1
4.1
4.1
37.7
37.7
46.9
46.9
15.4
15.4
45.8
45.8
27.4
27.4
6.0
6.0
20.8
20.8
39.7
39.7
27.4
27.4
4.5
4.5
28.4
28.4
-
-
-
-
-
-
22.1
22.1
-
25.1
25.1
-
22.9
22.9
-
-
-
23.8
23.8
-
Local
38
21
Local
38
21
State
62
73
62
73
State
Non-State
Non-State
Species
Compo (%)
(%)
Species Comp.
20.7
20.7
Butter
31.9
27.0
16.3
Butter
31.9
27.0
16.3
16.8
43.4
38.2
45.0
16.8
43.4
38.2
Cockle
45.0
Cockle
5.4
5.4
5.3
6.3
7.0
Gaper
6.3
7.0
5.3
Gaper
60.8
29.7
60.8
29.7
23.6
21.0
Littleneck
Littleneck
23.6
21.0
Softshell
Softshell
Clams/trip
Clamsltrip
4.9
5.0
4.9
Butter
7.1
6.8
5.0
Butter
7.1
6.8
10.3
4.9
10.3
8.4
11.3
4.9
Cockle
8.4
11.3
Cockle
1.3
1.6
1.3
1.4
1.8
1.6
Gaper
Gaper
1.4
1.8
18.4
18.4
7.0
Littleneck
5.2
5.3
7.0
Littleneck
5.2
5.3
Softshell
Softshell
Clams/hour
Cl
ams/ hour
Butter
3.2
3.2
Butter
Cockle
3.1
3.1
Cockle
Gaper
1.1
1.1
Gaper
11.7
Littleneck
11.7
Littleneck
Softshell
Softshell
Size Comp.
Comp. (x
(x size)
size)
Size
77.3
77 .3
Butter
Butter
63.9
63.9
Cockle
Cockle
67.5
67.5
Gaper
Gaper
36.7
36.7
Littleneck
Littleneck
Softshell
Softshell
No. Clams
Clams Measured
Measured
No.
219
219
Butter
Butter
Cockle
290
Cockle
290
Gaper
74
Gaper
74
Littleneck
297
Littleneck
297
Softshell
Softshell
1
Jan. 1,
effective Jan.
~
Regulation change
change in
in bag
bag limit;
limit; effective
1, 1977
1977
Regulation
1978
1978
1979
1979
1980
1980
1981
1981
-
-
18.2
18.2
28.5
28.5
18.5
18.5
34.7
34.7
10.5
10.5
46.7
46.7
17.2
17.2
24.9
24.9
-
4.2
4.2
6.6
6.6
4.3
4.3
8.1
8.1
1.9
1.9
8.6
8.6
3.2
3.2
4.6
4.6
-
3.1
3.1
4.9
4.9
3.2
3.2
5.9
5.9
1.5
1.5
6.5
6.5
2.4
2.4
3.5
3.5
-
-
81.6
81.6
64.3
64.3
56.8
56.8
36.8
36.8
-
536
536
978
978
349
349
518
518
-
83.8
83.8
55.9
55.9
69.3
69.3
39.4
39.4
-
394
394
1,517
1,517
538
538
862
862
-
11.5
11.5
66.6
66.6
7.1
7.1
14.7
14.7
-
2.2
2.2
12.9
12.9
1.4
1.4
2.8
2.8
-
2.0
2.0
11.8
11.8
1.3
1.3
2.6
2.6
13.5
13.5
64.0
64.0
9.6
9.6
12.7
12.7
-
2.5
2.5
11.9
11.9
1.8
1.8
2.4
2.4
-
2.1
2.1
9.9
9.9
1.5
1.5
2.0
2.0
28.7
28.7
46.5
46.5
7.1
7.1
17.7
17.7
-
145
145
637
637
84
84
233
233
-
72.3
72.3
60.9
60.9
84.2
84.2
38.5
38.5
-
555
555
1,501
1,501
327
327
171
171
-
42.8
42.8
24.2
24.2
5.7
5.7
27.2
27.2
1983
1983
-
-
-
-
5.5
5.5
8.9
8.9
1.4
1.4
3.4
3.4
7.8
7.8
4.4
4.4
1.4
1.4
5.0
5.0
8.9
8.9
5.3
5.3
1.2
1.2
4.0
4.0
7.4
7.4
5.1
5.1
0.9
0.9
5.3
5.3
-
-
-
-
4.6
4.6
7.4
7.4
1.1
1.1
2.8
2.8
6.3
6.3
3.6
3.6
0.9
0.9
4.0
4.0
6.7
6.7
4.0
4.0
0.9
0.9
3.0
3.0
6.2
6.2
4.3
4.3
0.7
0.7
4.4
4.4
-
-
-
83.0
83.0
55.2
55.2
82.0
82.0
38.2
38.2
-
1982
1982
64.8
64.8
55.0
55.0
90.2
90.2
36.5
36.5
70.6
70.6
56.9
56.9
91.3
91.3
39.5
39.5
-
70.3
70.3
60.1
60.1
114.1
114.1
38.0
38.0
68.8
68.8
54.0
54.0
107.9
107.9
37.0
37.0
-
304
304
535
535
111
111
187
187
413
413
254
254
81
81
251
251
379
379
389
389
77
392
392
481
481
407
407
-
-
-
-
21
21
461
461
Table
Table 4.
4.
ANNUAL SUMMARY
SUMMARY OF
INTERVIEW DATA
DATA
ANNUAL
OF RECREATIONAL
RECREATIONAL INTERVIEW
Bay:
Ti 11 amook
Bay: Tillamook
1978
1978
1979
1979
1980
1980
1981
1981
1982
1982
1983
1983
170
170
2,664
2~664
333
333
2.0
2.0
15.7
15.7
8.0
8.0
38
38
574
574
70.4
70.4
1.9
1.9
15.1
15.1
8.2
8.2
79
79
1,063
1,063
146.1
146.1
1.8
1.8
13.5
13.5
7.3
7.3
119
119
1,465
1,465
215.6
215.6
1.8
1.8
12.3
12.3
6.8
6.8
34
34
314
314
57.5
57.5
1.7
1.7
9.2
9.2
5.5
5.5
13
13
11
17.0
17.0
11
21.0
20.2
14.7
21.0
20.2
14.7
13.2
10.1
13.2
10.1
Local
Local
74.5
73.0
74.5
79.0
76.3
73.0
79.0
76.3
89.9
89.9
State
State
10.5
0.0
16.0
5.3
6.5
16.0
5.3
6.5
10.5
0.0
Non-State
Non-State
Spec i es Comp.
Comp~ (%)
rf)
Species
<0.1
<0.1
0.1
0.1
Butter
0.6
Butter
0.6
91,4
78.5
87.3
91.4
85.0
85.0
78.5
87,3
85.8
Cockle
Cockle
85.8
12.2
12.2
8.8
12.3
17.5
8.0
8.8
12.3
17.5
8.0
Gaper
Gaper
0.1
1.3
0.1
0.8
0.1
Litt leneck
Littleneck
1.3
0.1
0.8
11
Softshe
Softshell
Clams/trip
Clams/trip
<0.1
<0.1
<0.1
<0.1
0.1
0.1
Butter
Butter
17.1
17.1
Cockle
Cockle
12.3
13.2
12.3
13.2
12.3
20.5
12.3
20.5
Gaper
2.9
2.7
1.8
2.9
2.7
1.8
1.1
1.8
1.8
1.1
Gaper
Littleneck
0.3
<0.1
0.1
<0.1
Littleneck
0.3
<0.1
0.1
<0.1
Softshell
Softshell
C1
ams7nour
Clams/hour
<0.1
<0.1
<0.1
Butter
<0.1
<0.1
<0.1
Butter
7.1
Cockle
6.7
Cockle
11.0
11.3
7.1
6.7
11.0
11.
3
6.3
6.3
1.1
1.4
Gaper
1.1
1.6
1.4
1.0
0.6
1.6
1.0
0.6
Gaper
<0.1
<0.1
Litt 1eneck
<0.1
0.1
Littleneck
<0.1
0.1
0.2
0.2
Softshell
Softshell
Size-rDmp.
(x size)
size)
Size Comp. (x
Butter
Butter
64.0
68.4
64.0
68.4
Cockle
66.0
66.1
Cockle
66.0
66.1
107.9
Gaper
104.7
109.3
107.9
104.7
109.3
110.6
Gaper
110.6
42.0
42.0
Littleneck
Littleneck
Softshell
Softshell
No. Clams
Crams Measured
Measurea
No.
Butter
Butter
*
781
318
525
Cockle
1,075
Cockle
1,075
781
318
525
Gaper
224
118
68
79
Gaper
224
118
68
79
Littleneck
Littleneck
Softshell
Softshell
1/ Rec
1/
Rer Ition
in bag
bag limit;
effective Jan.
1, 1977
1977
Jan. 1,
limit; effective
ition change
change in
21.8
21.8
73.1
73.1
5.0
5.0
20.6
20.6
70.6
70.6
8.8
8.8
15.4
15.4
84.6
84.6
0.0
0.0
0.4
0.4
89.6
89.6
7.1
7.1
0.5
0.5
74.2
74.2
1.3
1.3
1.3
1.3
1971
1971
No. Diggers
Diggers Sampled
Sampled 10,379
10,379
No.
No. Clams
Clams Sampled
Sampled 216,728
216,728
No.
No. Digger
Digger Hours
Hours
16,156
16,156
No.
1.6
Hours/trip
1.6
Hours/trip
Clams/trip
20.9
20.9
Clams/trip
13.4
Clams/hour
13.4
Clams/hour
Digger
origin (%)
(%)
Digger origin
~
~
Tideflat: Bay
Bay Ocean
Ocean
Tideflat:
1/
1/
1977
1977
1976~·
1976
94
94
2,242
2,242
171
171
1.8
1.8
23.9
23.9
13.1
13.1
-
<0.1
<0.1
11.0
11.0
0.9
0.9
<0.1
<0.1
-
<0.1
<0.1
6.1
6.1
0.5
0.5
<0.1
<0.1
-
-
1.3
1.3
<0.1
<0.1
<0.1
<0.1
16.0
16.0
1.5
1.5
5.7
5.7
3.9
3.9
0.0
0.0
72.7
27.3
27.3
-
-
95.2
95.2
-
-
-
-
-
100.0
100.0
-
-
-
-
-
5.5
5.5
-
-
-
-
6.9
6.9
0.1
0.1
0.1
0.1
<0.1
<0.1
-
-
4.1
4.1
0.1
0.1
0.1
0.1
-
-
3.8
3.8
-
-
-
-
<0.1
<0.1
-
-
-
-
60.6
60.6
105.5
105.5
37.0
37.0
-
-
-
-
-
-
277
277
44
44
213
213
-
44
44
-
-
-
71.2
71.2
106.2
106.2
-
11
63
63
-
67.6
67.6
-
-
-
-
59
59
-
-
-
-
-
11
-
19
19
19
19
19
19
Table
Table 5.
5.
ANNUAL
RECRL"IIONAL INTERVIEW
INTERVIEW DATA
DATA
ANNUAL SUMMARY
SUMMARY OF
OF RECRL.IIONAL
Bay:
Netarts
Bay: Netarts
1971
I971
1975
1975
1976
1976
1
1/
1977
I77
5,106
5,106
85,230
85,230
6,613
6,613
1.3
1.3
16.7
16.7
12.9
12.9
18
18
164
164
141
141
1,709
1,709
193
193
1.4
1.4
12.1
12.1
8.9
8.9
187
187
2,727
2,727
254
254
1.4
1.4
14.6
14.6
10.7
10.7
Tideflat:
Happy Camp
Camp
Tideflat: Happy
1978
1978
1979
1979
1980
1980
1981
1981
1982
1982
1983
1983
146
146
1,747
1,747
149.2
149.2
1.0
1.0
12.0
12.0
11.7
11.7
222
222
2,823
2,823
204.4
204.4
0.9
0.9
71
71
13.8
13.8
106
106
1,293
1,293
67.7
67.7
0.6
0.6
12.2
12.2
19.1
19.1
991
991
66.8
66.8
0.9
0.9
12.9
12.9
14.8
14.8
168
168
2,020
2,020
150.5
150.5
0.9
0.9
12.0
12,0
13.4
13.4
280
280
2,994
2,994
290.0
290.0
1.0
1.0
10.7
10.7
10.3
10.3
17.6
17.6
29.1
29.1
14.9
14.9
11.0
11.0
Local
Local
74.8
74.8
75.9
66,0
75.9
71.2
State
66.0
State
71.2
7.6
7.6
Non-State
5.0
9.1
17.8
5.0
17
.8
9.1
Non-State
Compo (%)
SpeciesConip.
(%)
Secies
47.1
9.2
5.8
2.6
47.1
9.2
5.8
2.6
Butter
20.8
Butter
20.8
1.0
0.1
1.0
0.0
0.1
21.9
0.0
21. 9
Cockle
Cockle
91.0
73.6
62.5
91.0
Gaper
95.7
Gaper
95.7
73.6
62.5
36.6
36.6
0.8
5.4
0.8
5.4
3.1
Litt
1eneck
15.9
5.3
3.1
Littleneck
15.9
5.3
Softshell
Softshell
.:. Clams/trip
Clams/trip
'P
0.4
0,7
'f
0.4
1.3
0.7
Butter
2.5
1.3
3.3
2.5
Butter
3.3
0.0
0.2
<0.1
3.2
0.0
Cockle
0.2
0.0
<0.1
3.2
0,0
Cockle
Gaper
16.0
4.3
4.3
16.0
8.9
9.1
10.9
Gaper
8.9
9.1
10.9
1.4
0.4
0.1
0.4
littleneck
1.4
0.8
Littleneck
0.1
0.6
0.8
0.6
Softshell
Softshell
C1
ams/hour
Clams/hour
0.7
0.3
1.8
1.0
0.7
1.8
0.3
1.0
Butter
Butter
<0.1
0.1
2.3
0.0
0.1
<0.1
2.3
0.0
Cockle
Cockle
10.7
6.7
Gaper
10.7
6.7
6.5
12.3
Gaper
12.3
6.5
0.4
0.6
0.4
littleneck
Littleneck
0.1
06
0.5
0.1
0.5
Softshe
11
Softshell
Size
Compo (x
(x size)
size)
Size Comp.
103.2
103.2
Butter
102.8
100.2
103.0
102.8
100.2
103.0
Butter
Cockle
Cockle
Gaper
96.3
86.1
87.5
112.1
96.3
86.1
87.5
112.1
93.2
Gaper
93.2
70.1
70.0
70.1
Littleneck
67.6
70.0
Littleneck
65.3
67.6
65.3
Softshell
Softshell
No. Clams
Clams Measured
Measured
No,
Butter
66
219
Butter
66
219
Cock
le
190
Cockle
190
Gaper
190
643
557
921
Gaper
190
643
557
921
282
282
Littleneck
43
54
Littleneck
43
54
99
28
99
28
11
Softshe
Softshell
Ij Regulation
limit; effective
effective Jan.
Jan. 1,
~
Regulation change
change in
bag limit;
1, 1977
1977
in bag
28.4
28.4
59.9
59.9
11.7
11.7
17.9
17.9
73.6
73.6
8.5
8.5
40.3
40.3
50.6
50.6
48.2
48.2
44.0
44.0
7.7
7.7
22.5
22.5
72.9
4.6
7.7
7.7
5.4
5.4
0.1
0.1
92.5
92.5
2.0
2.0
13.7
13.7
5.0
5.0
<0.1
<0.1
94.3
94.3
0.6
0.6
0.7
0.7
0.1
0.1
98.5
98.5
0.8
No. Diggers
Diggers Sampled
Sampled
No.
No.
Clams
Sampled
No. Clams Sampled
No.
No. Digger
Di9ger Hours
Hours
Hoursltri p
Hours/trip
Clams/trip
Clams/trip
Cl ams/hour
Clams/hour
origin (%)
(%)
Digger
Digger origin
-
9.1
9.1
-
2.7
~2.7
-
90.3
90.3
0.2
0.2
-
1.0
1.0
-
11.5
11.5
0.2
0.2
-
1.1
1.1
-
12.5
12.5
0.3
0.3
-
9.1
9.1
00
82.7
82.7
3.4
3.4
-
0.7
0.7
<0.1
<0.1
11.3
11.3
0.2
0.2
-
-
1.8
1.8
0
0
10.6
10.6
0.4
0.4
0.6
0.6
<0.1
<0.1
11.3
11.3
0.1
0.1
-
-
1,0
1.0
<0.1
<0.1
17.7
17.7
0.4
0.4
2.0
2.0
00
12.3
12.3
0.5
0.5
0.1
0.1
<0.1
<0.1
10.5
10.5
0.1
0.1
0.7
0.7
<0.1
<0.1
12.7
12.7
0.1
0.1
0.1
0.1
<0.1
<0.1
10.2
10.2
0.1
0.1
-
-
-
-
-
107.2
107.2
105.9
105.9
109.7
109,7
102.5
102.5
-
-
-
-
82.0
31.0
31.0
101.9
101.9
55.8
55.8
92.1
92.1
73.6
73.6
-
93.6
93.6
66.7
66.7
-
-
24
24
-
98.9
98.9
71.3
71.3
-
-
417
417
34
34
468
468
-
-
33
97.7
97.7
70.7
70.7
-
109
109
62
62
-
-
454
454
22
22
565
565
-
-
9
9
6
11
338
338
4
4
6
-
19
19
19
19
Table
Table 6.
6.
ANNUAL SUMMARY
SUMMARV OF
OF RECREATIONAL
RECREATIONAL INTERVIEW
INTERVIEW DATA
DATA
ANNUAL
Bay:
Netarts
Bay: Netarts
1971
1971
I
~
I
1975
1975
1976
1976
1/
1977'
1977
Tideflat:
Cape Lookout
Lookout Sand
Sand Spit
Spit
Tideflat: Cape
1978
1978
43
76
509
72
No.
Diggers Sampled
Sampled 6,473
6,473
43
76
509
72
No. Diggers
2,433
No. Clams
Clams Sampled
Sampled 115,811
115,811
1,038
2,433
9,293
1,324
1,038
9,293
1,324
No.
8,656
148
No. Digger
Digger Hours
Hours
8,656
148
1,055
148.8
1,055
148.8
No.
1.3
Hours/trip
1.3
1.9
2.1
2.1
1.9
2.1
2.1
Hours/trip
17.9
24.1
32.0
18.3
18.4
Clams/trip
17.9
24.1
32.0
18.3
18.4
Clams/trip
13.4
16.5
Clams/hour
13.4
16.5
8.8
8.9
8.8
8.9
Clams/hour
Digger
origin (%)
(%)
Digger origin
17.6
17.6
23.7
23.7
23.1
22.2
23.1
22.2
Local
Local
74.8
74.8
76.3
76.3
66.6
66.6
77 .8
77.8
State
State
7.6
7.6
0.0
10.6
0.0
10.6
0.0
0.0
Non-State
Non-State
Species
Compo (%)
(%)
Species Comp.
38.4
38.4
49.0
49.0
15.8
6.6
2.0
15.8
6.6
2.0
Butter
Butter
44.4
44.4
76.9
46.0
46.0
76.9
72.3
72.7
72.3
72.7
Cockle
Cockle
8.9
8.9
2.7
22.4
2.7
3.7
15.3
22.4
Gaper
3.7
15.3
Gaper
1.3
2.1
6.9
1.3
2.1
6.9
Littleneck
3.2
1.3
3.2
1.3
Littleneck
Softshell
Softshell
Clams/trip
Clams/trip
Butter
6.9
6.9
11.8
11.8
Butter
1.2
0.4
1.2
0.4
5.1
5.1
11,1
24.6
11.1
24.6
8.0
13.2
8.0
13.4
13.2
13.4
Cockle
Cockle
1.6
1.6
0.7
4.1
0.7
1.2
4.1
2.8
Gaper
1.2
2.8
Gaper
0.3
0.4
1.2
1.2
0.3
1.0
0.4
Littleneck
1.0
0.2
Littleneck
0.2
Softshe 11
Softshell
ITams7hour
Clams/hour
5.1
5.1
Butter
2.6
0.6
2.6
0.6
0.2
Butter
0.2
5.9
5.9
12.7
12,7
6.4
Cockle
Cockle
6.5
6.5
6.4
Gaper
1.2
1.2
0.6
2.0
Gaper
0.6
1.3
2.0
1.3
Littleneck
0.9
0.9
0.5
Littleneck
0.5
0.2
0.1
0.2
0.1
Softshell
Softshell
Size Comp:Comp. VsTze)
(x size)
Sfze
84.5
76.9
Butter
84.5
80.3
71.8
74.1
76.9
Butter
80.3
71.8
74.1
65.4
65.4
73.3
75.7
72.7
73.3
73.0
Cockle
75.7
72.7
Cockle
73.0
Gaper
108.1
108.1
80.4
80.4
87.4
87.4
103.4
103.4 100.5
100.5
Gaper
57.9
57.9
Littleneck
57.8
Littleneck
57.8
Softshell
Softshell
No.
CramS-Measured
No. Clams
Measured
11
237
294
80
11
237
294
80
Butter
32
Butter
32
674
851
555
674
851
555
245
257
245
257
Cockle
Cockle
36
170
144
36
170
144
Gaper
257
257
52
Gaper
52
12
12
31
31
Littleneck
Littleneck
Softshe 11
Softshell
+1'7'Rre~t
Ition
in bag
bag limit;
effective Jan.
Jan. 1,
1, 1977
1977
1TRe
limit; effective
ition change
change in
1979
1979
1980
1980
1981
1981
1982
1982
1983
1983
85
85
1,560
1,560
178
178
63
63
1,074
1,074
88.5
88.5
80
80
1,397
1,397
149.5
149.5
56
56
1,029
1,029
83.0
83.0
118
118
2,174
2,174
196.5
196.5
18.4
18.4
8.8
8.8
17.0
17.0
12.1
12.1
17.5
17.5
9.3
9.3
18.4
18.4
12.4
12.4
18.4
18.4
11.1
11.1
36.5
36.5
61.2
61.2
2.3
2.3
17.5
76.2
76.2
6.3
6.3
12.5
12.5
81.3
81.3
7.5
7.5
44.6
44.6
51.8
51.8
3.6
3.6
38.1
38.1
53.4
53.4
8.5
8.5
5.5
5.5
1.9
1.9
93.3
93.3
4.8
4.8
7.7
7.7
76.7
76.7
0.3
0.3
84,9
84.9
12.1
12.1
2.6
2.6
11.0
11.0
80.4
80.4
5.9
5.9
2.6
2.6
2.1
2.1
74.4
16.0
16.0
3.8
3.8
1.4
1.4
-
1.0
1.0
2.9
2.9
0.7
0.7
-
13.3
1.9
1.9
0.3
0.3
15.9
15.9
0.8
0.8
-
1.4
1.4
13.4
13.4
2,3
2.3
0.3
0.3
-
-
0.2
0.2
1.4
1.4
0.3
0.3
0.6
0.6
-
0.7
0.7
7.2
7.2
1.2
1.2
0.2
0.2
-
-
-
0.5
0.5
6.5
6.5
80.4
80.4
75.2
75.2
91.7
91.7
53.7
53.7
1.5
1.5
11.3
75.6
75.6
72.2
110.7
110.7
-
74.2
74,2
72.0
72.0
104.7
104.7
53.3
53.3
-
0.1
0.1
15.6
15.6
2.2
2.2
0.5
0.5
-
-
2.0
2.0
14,8
14.8
1.1
1.1
0.5
0.5
-
<0.1
<0.1
10.5
10.5
1.5
1.5
0.3
1.2
1.2
8.9
8.9
0.7
0.7
0.3
0.3
-
67.7
57.7
71.3
71.3
119.0
49.5
49.5
-
86
86
812
812
191
191
60
60
1.7
1.7
-
-
-
13.6
13.6
1.9
1.9
68.8
68.8
69.5
69.5
117.7
117.7
42.2
42.2
-
20
20
525
525
44
44
-
49
49
486
486
48
48
13
13
33
534
534
71
71
26
26
-
27
27
238
238
15
15
53
53
-
19
19
19
19
Table 7.
7.
Table
Bay:
Nestucca
Bay: Nestucca
No. Diqgers
Oiqgers Sampled
Sampled
No.
No.
Sampled
No. Clams
Clams Sampled
No. Digger
No.
Di 9ger Hours
Hours
Hours/trip
Hours/trip
Clams/trip
Clams/trip
C1
ams/hour
Clams/hour
Digger
origin (%)
(%)
Digger origin
I
r
N
......
I
ANNUAL SUMMARY
SUMMARY OF
OF REC
REC
ANNUAL
,TIONAl
INTERVIEW DATA
DATA
TIONAL INTERVIEW
Tideflat:
little Nestucca
Nestucca Flat
Flat
Tideflat: Little
1
1/
1971
1971
1977
1977
1979
1979
1,466
1.466
23,211
23.211
1,584
1,584
1.1
1.1
15.8
15.8
14.7
14.7
34
34
1,049
1.049
43
43
1.3
1.3
30.9
30.9
24.4
24.4
16
16
484
484
21
21
13
1.3
30.3
30.3
23.2
23.2
19m­
1980
38
38
1,120
1,120
72
72
1.9
1.9
29.5
29.5
15.6
15.6
1981
1981
1982
198?
1983
1983
23
23
357
357
27
27
1.2
1.2
15.5
15.5
13.2
13.2
22
22
653
653
31
31
22
22
623
623
33.5
33.5
1.5
1.5
28.3
28.3
18.6
18.6
4.5
4.5
86.4
86.4
18.2
18,2
77
.3
77.3
4.6
4.6
12.4
12.4
13.0
52.9
18.8
0
13.0
Local
52.9
18.8
0
Local
47.1
62.5
73.5
47.1
62.5
86.8
87.0
73.5
86.8
87.0
State
State
14.1
14.1
13.2
0.0
18.8
13.2
18.8
0.0
Non-State
0
Non-State
0
Species
Compo (%)
(%)
Species Comp.
Butter
Butter
00
00
00
0
00
Cock le
Cockle
0
00
00
Gaper
00
0
00
Gaper
0
00
Littleneck
0
0
00
Littleneck
0
0
0
0
100.0
100.0
100,0
100.0
100.0
Soft
she 11
100.0
100.0
100.0
100.0
100.0
Softshell
Clams/trip
Clams/trip
Butter
Butter
00
00
00
00
Cockle
Cockle
0
0
Gaper
0
00
0
Gaper
0
0
00
00
Littleneck
Littleneck
00
00
00
00
0
0
Softshe
11
15.5
15.5
15.8
29.5
Softshell
15.8
29.5
30.9
30.3
30.9
30.3
Clams/hour
Clams/hour
Butter
Butter
00
00
Cock
le
00
00
Cockle
00
Gaper
0
00
Gaper
0
00
0
00
0
Littleneck
Litt
leneck
00
0
00
0
a0
0
0
13.2
13.2
Softshell
14.7
24.4
23.2
15.6
SoftsheIl
14.7
24.4
23.2
15.6
Size Conip.
Size
Compo (x
(x size)
size)
Butter
Butter
Cock
le
0
0
00
0
Cockle
0
0
0
Gaper
00
a
Gaper
0
a0
a
0
Litt 1eneck
0
Littleneck
0
00
00
00
78.3
78.3
Softshe 11
84.2
79.9
Softshell
84.2
79.9
86.0
86.0
No.
Clams Measured
Measured
No. Clams
Butter
Butter
00
Cock le
00
0
Cockle
0
a0
0
0
Gaper
00
00
Gaper
00
a0
0
0
Littleneck
Littleneck
a0
00
0
0
00
00
254
Softshell
0
250
332
254
163
Softshell
0
250
332
163
!J Regulation change
change in
bag limit;
limit; effective
effective Jan.
Jan. 1,
1, 1977
1977
1flegulation
in bag
1.4
1.4
29.7
29.7
21.4
21.4
9.1
9.1
00
00
00
100.0
100.0
100.0
100.0
0
0
00
0
0
29.7
29.7
00
00
00
28.3
28.3
00
00
0
0
0
0
0
21.4
21.4
18.6
18.6
00
a
a
75.6
75.6
00
00
00
80.5
80.5
a
00
a0
0
0
0
00
00
547
547
00
0
0
0
0
a
a
0
0
0
300
300
19
W­
19
19
19
19
19
19
19
19
Table 8.
Table
8.
ANNUAL
SUMMARY OF
RECREATIONAL INTERVIEW
INTERVIEW DATA
DATA
ANNUAL SUMMARY
OF RECREATIONAL
Bay: Yaquina
tjiITh11!
1971
I
I
wi.
1976
-
88
88
694
694
-
-
-
-
-
7.9
7.9
-
-
29
29
414
414
36.0
36.0
1.2
1.2
14.3
11.7
11.7
1979
ii:Is
1980
1981
II:?
1982
1983
357
357
2,838
2,838
488
488
1.4
1.4
7.9
7.9
5.8
5.8
89
89
892
892
109.9
109.9
143
143
1,313
1,313
120.0
120.0
342
342
3,773
3,773
353.9
353.9
149
149
1,609
1,609
154.0
154.0
10.0
10.0
8.1
8.1
0.8
0.8
9.2
9.2
10.9
10.9
142
142
1,222
1,222
159.5
159.5
8.6
8.6
7.7
7.7
11.0
11.0
10.7
10.7
10.8
10.8
10.4
10.4
202
202
1,543
1,543
273.5
273.5
1.4
1.4
7.6
7.6
5.6
5.6
19.6
19.6
31.0
31.0
Local
Local
48.3
70.9
48.3
70.9
State
State
20.7
20.7
9.5
9.5
Non-State
Non-State
Species
Comp: (%)
r~\q
Species Comp.
0.2
0.2
0.8
0.2
0.8
0.2
0.8
0.8
Butter
Butter
72.2
45.4
42.1
72.2
45.4
Cockle
79.4
42.1
Cockle
79.4
43.6
54.8
24.6
43.6
19.5
54.8
24.6
Gaper
19.5
Gaper
1.4
2.3
1.4
2.3
1,4
Littleneck
0.8
1.4
Littleneck
0.8
Softshell
Softshell
Clams/trip
Clams/trip
Butter
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
Butter
<0.1
3.3
3.6
Cock le
7.3
10.3
Cockle
7.3
3,3
10.3
3.6
4.3
3.5
Gaper
1.8
4.3
3.5
3.5
1.8
3.5
Gaper
Littleneck
0.1
<0.1
0.2
0.1
0.2
<0.1
0.2
Littleneck
0.2
Softshell
Softshell
CTamsTfiour
CiTms/ hour
<0.1
<0,1
<0.1
<0.1
Butter
<0.1
<0.1
Butter
8.4
2.6
Cockle
Cockle
4,9
8.4
2.6
4.9
2.9
Gaper
2.5
Gaper
2.9
2.5
1.2
1.2
Littleneck
Littleneck
Softshell
Softshell
Comp. (x
( x size)
s; ze )
Size
Size Comp.
Butter
Butter
46.7
57,5
46.7
57.5
Cockle
Cockle
60.5
31.1
49.3
49.3
60.5
31.1
95.0
Gaper
115.5
115.5
95.0
107.1
Gaper
107.1
60.3
Littleneck
Littleneck
60.3
Softshell
Softshell
No.
Measured
No. Clams
Clams Measured
Butter
Butter
205
592
205
592
Cockle
276
Cockle
276
25
25
Gaper
Gaper
593
316
62
316
62
593
Litt
1eneck
Littleneck
12
12
*
Softshe 11
Softshell
!..,..7.....
....tTReg!
R"..;:e:. =g..;. ! ·-:-t""'
;-'-0-n-c-:"h-a-n-g-e-,;-'
n--:-b-ag----,
l,-,i-m""'"i""-t-;-e-;f=-=f-e-ct:-i'
-v-e--:rJ-a
n-.--:rl-,-.,.-,19"'
7.....7;-­
tion
change in
Jan.
1, 1977
bag ;limit;
effective
24.7
24,7
69.7
69.7
4.5
4.5
22.4
22.4
76.2
76.2
1.4
1.4
18.3
18.3
70.4
70.4
11.3
11.3
44.7
44.7
49.1
49.1
6.1
6.1
48.3
48.3
48.3
48.3
3.4
3.4
32.2
32.2
67.8
67.8
0.6
0.6
24.6
24.6
72.1
72.1
1.1
1.1
0.2
0.2
7.9
7.9
89.6
89.6
0.4
0.4
1.7
1.7
1.4
1.4
94.8
94.8
2.1
2.1
0.8
0.8
15.7
15.7
81.0
81.0
1.7
1.7
1.9
1.9
7.2
7.2
85.4
85.4
4.5
4.5
3.2
3.2
12.9
12.9
72.9
72.9
2.8
2.8
4,518
4,518
41,769
41,769
6,769
6,769
1.5
1.5
9.2
6.2
6.2
1972
deflat: Bridge Bed
wi:
1978
No. Diggers
Diggers Sampled
Sampled
No.
No.
Sampled
No. Clams
Clams Sampled
No.
Digger Hours
Hours
No. Digger
Hours/trip
Hours/trip
Clams/trip
Clams/trip
Clams/hour
Clams/hour
Digger
origin (%)
(%)
Digger origin
~
1975
1/
1977
-
1.2
1.2
-
<0.1
<0.1
2.5
2.5
7.2
7,2
0.1
0.1
-
<0.1
<0.1
0.7
0.7
8.2
8.2
0.1
0.1
<0.1
<0.1
0.9
0.9
9.8
9.8
-
-
-
-
69.9
69.9
101.7
101.7
-
67.5
67.5
66.8
66.8
96.8
96.8
51.5
51.5
-
-
-
202
202
154
154
51
51
279
279
-
71.9
71.9
55.8
55.8
100.0
100.0
62.2
62.2
14
14
6
6
419
419
19
19
-
1.0
1.0
o0
-
-
0.1
0.1
1.7
1.7
8.9
8.9
0.2
0.2
0.2
0.2
0.8
0.8
9.2
9.2
0.5
0.5
0.3
0.3
1.0
1.0
5.6
5.6
0.2
0.2
-
-
0.1
0.1
1.1
1.1
8.6
8.6
0.2
0.2
0.8
0.8
8.9
8.9
-
-
0.2
0.2
0.7
0.7
4.1
4.1
0.2
0.2
-
-
-
72.5
72.5 80.4
80.4
57.4
65.1
57.4
65.1
107.7
105.9
107.7 105.9
54.7
54.7
54.7
54.7
-
*
22
-
0.1
0.1
0.1
0.1
7.3
7.3
-
-
-
<0.1
<0.1
<0.1
<0.1
8.2
8.2
0.2
0.2
-
-
1.0
1.0
-
-
0.1
0.1
2.0
2.0
5.9
5.9
1.1
1.1
74.0
74.0
66.9
66.9
104.6
104.6
52.4
52.4
-
20
20
536
536
1,370
1,370
55
35
35
86
86
308
308
138
138
55
99
-
-
406
406
34
34
-
19
Table
Table 9.
9.
ANNUAL SUMMARY
SUMMARY OF
OF RECkcMTIONAL
RECkcATIONAL INTERVIEW
INTERVIEW DATA
DATA
ANNUAL
Bay: Yaquina
Yaquina
Bay:
No. Diggers
Diggers Sampled
Sampled
No.
No.
Sampled
No. Clams
Clams Sampled
No.
Hours
No. Digger
Digger Hours
Hours/trip
Hours/trip
Clams/trip
Clams/trip
Clams/hour
Clams/hour
Digger origin
origin (%)
(%)
Diqqer
1971
1971
1975
1975
1,455
1,455
22.175
22,175
2,179
2,179
1.5
1.5
15.2
15.2
10.2
10.2
46
46
515
515
1976
1976
-
-
11.2
11.2
-
-
Tideflat:
Breakwater Bed
Bed
Tideflat: Breakwater
1,
11
1977
1977
1978
1978
1979
1979
1980
1980
1981
1981
1982
1982
1983
1983
48
48
511
511
69.1
69.1
20
20
270
270
21.5
21.5
21
21
261
261
44
44
16
16
166
166
27
27
14
14
157
157
20.5
20.5
17
17
190
190
24.0
24.0
10.6
10.6
7.4
7.4
13.5
13.5
12.6
12,6
10
10
142
142
20.0
20.0
2.0
2.0
14.2
14.2
7.1
7.1
12.4
12.4
5.9
5.9
10.4
10.4
6.1
6.1
11.2
11.2
7.7
7.7
11.2
11.2
7.9
7.9
28.6
28.6
71.4
71.4
18.8
18.8
50.0
50.0
31.3
31.3
71.4
71.4
28.6
28.6
52.9
52.9
47.1
47.1
1.8
1.8
19.9
19,9
75.3
75.3
1.2
1.2
2.5
2.5
1.9
1.9
94.9
94.9
0.6
0.6
1.1
1.1
8.4
8.4
85.8
85.8
0.5
0.5
1.4
1.4
1.1
1.1
35.4
55.0
35.4
55.0
State
45
64.6
State
64.6
45
Non-State
Non-State
SpeciesComp.
(%)
Species Comp. (%)
0.7
1.4
0.7
1.4
1.2
1.5
1.2
1.5
Butter
Butter
18.2
18.2
15.3
3.9
13.7
15.3
3.9
13.7
Cockle
Cockle
78.9
84.4
78.9
84.4
83.0
95.0
Gaper
Gaper
83.0
95.0
0.4
0.4
0.4
Littleneck
0.4
0.2
0.8
Littleneck
0.2
0.8
Softshell
Softshell
~
C1
ams/tri p
Clams/trip
r
0.1
<0.1
0.1
0.1
'f
Butter
0.2
<0.1
0.1
Butter
0.2
1.8
Cockle
0.4
Cockle
0.4
1,9
1.8
1.9
2.3
2.3
Gaper
a
12.7
0
12.7
10.6
Gaper
Littleneck
<0,1
0.1
0.1
<0.1
<0.1
0.1
0.1
Littleneck
<0.1
Softshell
Softshell
(1
ams/flour
Clams/hour
Butter
0.1
0.1
0.1
Butter
0.1
0.1
0.1
Cockle
1.6
1.7
Cockle
1.6
1.3
1.7
1.3
Gaper
10.6
Gaper
10.6
5.8
8.4
8.4
5.8
<0.1
0.1
0.1
Littleneck
Littleneck
<0.1
0.1
0.1
11
Softshe
Softshell
Size
(x size)
size)
Size Compo
Comp. (x
<0.1
Butter
<0.1
0.1
<0.1
Butter
<0.1
0,1
76,1
Cockle
75.6
72.5
76.1
75.6
72.5
118.9
Gaper
113.8
116.2
123.3
118.9
Gaper
113.8
116.2
123.3
Littleneck
Littleneck
Softshell
SQftshe11
No .Cl
ams Measured
No.
Clams
Measured
Butter
Butter
Cockle
Cockle
79
79
Gaper
207
207
198
Gaper
198
310
310
Litt
1eneck
Littleneck
Softshe
11
Softshell
t/Thegulation
~I Regulation change
bag limit;
Jan. 1,
1, 1977
1977
change in
limit; effective
effective Jan.
in bag
Local
Local
30.0
30.0
-
2.1
2.1
-
-
a
0
7.0
7.0
84.5
84.5
a0
6.5
6.5
11,1
11.1
81.2
81.2
1.1
1.1
-
-
a
0
1.0
1.0
a0
a0
1.7
1.7
-
0.8
0.8
1,4
1.4
10.1
10.1
0.1
0.1
1.5
1.5
1.4
1.4
a0
a0
-
-
0.2
0.2
2.1
2.1
7.8
7.8
0.1
0.1
0.1
0.1
0.9
0.9
9.6
9.6
0.1
0.1
0.3
0.3
0.2
0.2
10.6
10.6
0.1
0.1
-
a
0
0.5
0.5
6.0
6.0
a0
-
0.4
0.4
0.6
0.6
4.8
4.8
0.1
0.1
0.1
0.1
1.2
1.2
4.6
4.6
0.1
0.1
-
-
<0.1
<0.1
85.3
85.3
-
-
-
109.1
109.1
64.0
64.0
-
-
-
-
0.1
0.1
0.7
0.7
6.8
6.8
<0.1
<0.1
-
-
97.0
97.0
81.6
81.6
106.4
106.4 100.7
100.7
51.0
51.0
-
62.6
62.6
106.4
106.4
-
-
-
o0
16
16
-
0.2
0.2
0.1
0.1
7.3
7.3
<0.1
<0.1
-
44
33
11
a0
-
195
195
27
27
69
69
142
142
109
109
-
33
0
11
1
1
37
37
-
-
a
-
12
12
19
19
19
19
Table 10.
Table
10. ANNUAL
ANNUAL SUMMARY
SUMMARY OF
OF RECREATIONAL
RECREATIONAL INTERVIEW
INTERVIEW DATA
DATA
Bay: Yaquina
Tideflat: Idaho Point
1/
IY1
19~
1975
1976
7L.
1977
1978
1979
10,462
123
42
309
20
No.
Sampled 10,462
123
42
309
20
193
No. Diggers
Diggers Sampled
193
812
2,783
138,784
No.
Clams
Sampled
2,600
812
3,773
298
2,783
138,784
2,600
3,773
298
No. Clams Sampled
247.8
No.
Digger Hours
Hours
76.5
464
25.2,
15,621
247.8
15,621
76.5
464
25.2
No, Digger
1.5
1.8
1.5
1.3
Hours/trip
1.5
1.8
1.5
1.3
1.3
1.3
Hours/trip
13.3
21.1
12.2
14.9
14.4
13.3
19.3
12.2
14.9
14.4
Clams/trip
21.1
19.3
Clams/trip
8.1
11.8
11.2
8.9
10.6
8.1
11.8
11.2
Clams/hour
8.9
10.6
Clams/hour
Digger origin
origin (%)
(%)
Digger
35.7
12.3
31.6
35.7
12.3
45.0
31.6
Local
Local
33.3
84.1
50.0
62.7
33.3
84.1
50.0
62.7
State
State
5.7
5.7
31.0
Non-State
31.0
3.6
5.0
Non-State
3.6
5.0
Spec;
es Comp.
Comp: (%)
T%)
Species
o
0
1.7
<0.1
0.5
1.7
<0.1
0.5
Butter
0.3
0.5
0.3
0.5
Butter
70.2
78.5
70.2
77.7
72.5
83.9
78.5
93,2
72.5
83.9
Cockle
93.2
Cockle
20.7
21.7
15.1
20.7
15.1
Gaper
21.7
5.8
18.4
13.1
5.8
18.4
13.1
Gaper
<0,1
<0.1
o0
0.1
0.1
0.4
0.1
0.2
0.1
Littleneck
0.4
0.2
Littleneck
Softshell
Softshell
r!.:, Clams/trlp
Clams/trip
<0.1
<0.1
o0
<0.1
<0.1
0.2
0.1
0.1
0.1
0.1
0.2
Butter
f'
Butter
19.7
19.7
14.0
12.5
10.1
10.3
14.0
9.6
10.3
9.6
12.5
Cockle
Cockle
3.0
3.0
2.9
Gaper
2.3
3.6
2.9
1,2
3.6
1.6
1.6
2.3
1.2
Gaper
<0.1
o0 <0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
Littleneck
<0.1
<0.1
Littleneck
Softshell
Softshell
C-rams/hour
Clams/hour
0.2
0.2
0.1
o
0.1
0.1
0.1
0,1
0.1
0
Butter
Butter
6.4
Cockle
7.7
9.9
7.9
6.9
6.9
7.7
6.4
9.9
7.9
Cockle
1.1
2.0
1.1
1.8
Gaper
2.0
1.8
2.3
1.9
2.3
1.9
Gaper
o
<0.1
0
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
Littleneck
Littleneck
Softshe11
Softshell
SlZe
Compo (x
(x size)
size)
Size Comp.
75.1
75.1
Butter
Butter
60.2
59.0
58.2
Cockle
Cockle
61.0
60.2
59.0
61.0
58.6
58.3
58.6
58.3
58.2
95.9
113.0
96.6
91.3
93.5
95.2
95.9
Gaper
113.0
96.6
91.3
93.5
95.2
Gaper
55.3
Litt1
eneck
Littleneck
55,3
Softshe11
Softshell
No.----cl
ams Measured
Measured
No.
Clams
Butter
Butter
45
45
Cock le
Cockle
1,804
Gaper
522
1,804
250 1,471
250
1,471
369
Gaper
369
522
173
173
Littleneck
126
42
24
Littleneck
171
126
42
24
171
Softshell
Softshell
Jan. 1,
1, 1977
!:J/ Reg'"
.. tion change
change in
in bag
bag limit;
limit; effective
effective Jan.
1977
Reg'tion
1980
1981
1982
1983
II*
182
182
147
147
3,118
3,118
301.6
301.6
2,339
2,339
222.3
222.3
80
80
1,219
1,219
144.5
144,5
17.1
17.1
10,3
10.3
15.9
15.9
10.5
10.5
15.2
15.2
8.4
8.4
1.8
1.8
138
138
2,171
2,171
219.0
219.0
1.6
15.7
15.7
9.9
9.9
28.6
28.6
65.4
65.4
6.0
6.0
15.6
15.6
70.7
70.7
13.6
13.6
18.8
18.8
81.3
81.3
9.4
9.4
85.5
85.5
0.1
0.1
93.4
93.4
4.1
4.1
0.5
0.5
o
0
95.0
95.0
2.9
2.9
0.9
0.9
0.4
0.4
85.5
85.5
2.8
2.8
0.7
0.7
1.7
1.7
o0
87,2
87.2
12.8
12.8
o0
o0
14,9
14.9
2.2
2.2
o
0
o0
14.9
14.9
0.6
0.6
<0.1
<0.1
-
-
o
0
1.6
o0
-
-
-
r
1.5
1.5
-
o
0
0.1
0.1
14.5
14.5
0.4
0.4
<0.1
<0.1
13.5
l3.5
0.4
0.4
0.1
0.1
-
-
o
o0
0
1.3
1.3
9.0
9.0
9.8
9.8
0.4
0.4
0.0
0.0
8.0
8.0
0.2
0.2
0.1
0.1
-
-
-
o0
-
57.8
57.8
94.5
94.5
-
-
87.3
87.3
54.3
54.3
91.7
91.7
50.1
50.1
-
5.1
5.1
<0.1
<0.1
8.5
8.5
0.3
0.3
0.1
0.1
-
o0
-
54.4
54.4
83.3
83.3
42.7
42.7
-
52.6
52.6
89.1
89,1
42.6
42.6
-
o0
4
4
-
1,620
1,620
1,302
1,302
-
131
131
75
540
540
75
-
40
40
99
-
-
-
-
-
-
55
-
19
19
Table 11.
Table
11.
ANNUAL SUMMARY
INTERVIEW DATA
DATA
ANNUAL
SUMMARY OF
OF REL"..:ATIONAL
RELATIONAL INTERVIEW
Bay: Yaquina
Yaquina
Bay:
1971
1971
1975
1975
1976
1976
No. Diggers
Diggers Sampled
Sampled 5,857
5,857
No.
No. Clams
Clams Sampled
Sampled 119,702
119,702
No.
8,725
8,725
No. Digger
Digger Hours
Hours
No.
1.5
1.5
Hoursltri
p
Hours/trip
20.4
20.4
Clams/trip
Clams/trip
13.7
13.7
Cl ams/hour
Clams/hour
origin (%)
(%)
Digger
Digger origin
92
92
13,541
13,541
93
93
583
583
139.0
139.0
1.5
1.5
17.0
17.0
11.4
11.4
N
t,,.,
I
-
14.7
14.7
-
1978
1978
1979
I979
1980
1980
1981
1981
1982
1982
1983
1983
315
315
3,852
3,852
402.0
402.0
49
49
684
684
66.8
66.8
137
137
1,073
1,073
164.8
164.8
38
38
151
151
54.4
54.4
29
29
128
128
32.5
32.5
12.2
12.2
9.6
9.6
14.0
14.0
10.2
10.2
7.8
7.8
6.5
6.5
63
63
495
495
84.3
84.3
1.3
7.9
7.9
5.9
5.9
4.4
4.4
3.9
3.9
23
23
219
219
25.0
25.0
1.1
1.1
9.5
9.5
8.8
8.8
33.6
33.6
49.6
49.6
16.8
16.8
30.2
30.2
68.3
68.3
1.5
1.5
36.8
36.8
57.9
57.9
5.3
5.3
65.5
65.5
34.5
34.5
00
34.8
34.8
65.2
65.2
00
0.2
0.2
81.9
81,9
11.9
11.9
0.6
0.6
0.6
0.6
78.4
78.4
19.6
19.6
1.4
1.4
2.0
2.0
11.3
11.3
34.4
34.4
2.0
2.0
47.0
47.0
00
91.4
91.4
7.0
7.0
1.6
1.6
0.5
0.5
84.0
84.0
1.3
1.3
1.4
1.4
22.5
59.2
9.7
22.5
59.2
Local
9.7
Local
72.1
72
.1
38.8
38.8
State
86.0
State
86.0
2.0
5.4
2.0
Non-State
4.3
5.4
Non-State
4.3
Species
Compo (%)
Species Comp.
%)
0.6
1.9
0.1
1.1
0.1
Butter
0.6
1.9
0.1
1.1
0.1
Butter
85.1
74.5
82.6
85.1
71.3
74.5
82.6
60.6
71.3
Cockle
Cockle
60.6
12,7
Gaper
12.7
29.8
22.0
l3.8
16.8
29.8
22.0
13.8
16.8
Gaper
0.7
Littleneck
0.7
0.4
0.5
Littleneck
1.3
0.5
0.4
1.3
0.3
0.3
Softshell
Softshell
Clamsltr;p
Clams/trip
<0.1
<0.1
<0.1
<0.1
0.1
0.1
Butter
0.1
0.3
0.1
Butter
0.3
17.4
12.1
9.1
17.4
12.1
9,1
11.5
Cockle
8.9
11.5
Cockle
8.9
4.4
3.7
2,6
4.4
3.7
1.7
2.3
Gaper
2.6
1.7
2.3
Gaper
0.1
litt
leneck
0.1
0.2
<0.1
0.1
0.1
Littleneck
0.1
0.2
<0.1
0.1
11
Softshe
Softshell
Cl
amslhour
Clams!
hour
<0.1
<0.1
<0.1
<0.1
<0.1
0.1
<0.1
Butter
0.1
Butter
Cockle
11.7
8.1
7.1
11.7
8.1
7.1
8.5
Cockle
8.5
1.7
1.7
1.7
2.5
1.7
2.5
1.3
Gaper
1.3
Gaper
<0.1
<0.1
leneck
<0.1
<0.1
0.1
Litt
<0.1
0.1
<0.1
Littleneck
Softshell
Softshell
Size
Comp. (x
(x size)
size}
Size Comp.
Butter
Butter
Cock
le 2/
60.0
66.3
63,4
60,7
60.0
66.3
63.4
56.5
60.7
Cockle2/
56.5
101.1
Gaper
Gaper
101.1
91.5
92.8
91.3
91.5
92.8
95.3
91. 3
95.3
Littleneck
Littleneck
Softshell
Softshell
No. Clams Measured
No.
Measured
Butter
Butter
889
525
889
525
219
648
Cockle
Cockle
219
648
Gaper
451
217
152
106
Gaper
451
217
152
106
Littleneck
Littleneck
Softshell
Softshell
17 Regulation
Jan, 1,
in bag
~
Regulation change
change in
bag limit;
1, 1977
1977
limit; effective
effective Jan.
_// 1972,
1972, Cockle
Cockle == 66.6mm
66.6mm
---_.­
I
-
Tideflat:
Northwest Gas
Gas Plant
Plant
Tideflat: Northwest
1,
1/
1977
1977
1.2
1.2
-
<0.1
<0.1
6.4
6.4
0.9
0.9
<0.1
<0.1
-
<0.1
<0.1
5.3
5.3
0.8
0.8
<0.1
<0.1
-
-
59.4
59.4
94.9
94.9
-
-
1.3
-
0.1
0.1
6.2
6.2
1.5
1.5
0.1
0,1
0.1
0.1
0.4
0.4
1.4
1.4
0.1
0.1
1.9
1.9
-
<0.1
<0.1
4.6
4.6
1.2
1.2
0.1
0.1
-
99.0
99.0
52.5
52.5
96.0
96,0
47.4
47.4
-
606
606
96
96
55
11
349
349
61
61
55
-
-
-
1.4
1.4
4.0
4.0
2.8
2.8
.
0.1
0.1
0.3
0.3
1.0
1.0
0.1
0.1
1.3
1.3
80.0
80,0
47.1
47.1
88.8
88.8
48.0
48.0
57.5
57.5
1,1
1.1
0
0
4.0
4.0
0.3
0.3
0.1
0.1
-
-
0
0
<0.1
<0,1
7,4
7.4
0
0
1.2
1.2
97.0
97.0
57.0
57.0
96.5
96.5
45.8
45.8
-
-
00
60
60
7
7
00
-
00
1.3
1.3
-
50.2
50.2
87,3
87.3
45.5
45.5
2
<0.1
<0.1
8.0
8.0
-
00
3.6
3.6
0.3
0.3
0.1
0.1
11
2
2
2
-
-
18
18
46
46
0
0
13.7
13.7
11
177
177
88
30
30
-
19
19
19
19
Table 12.
Table
12.
ANNUAL
INTERVIEW DATA
DATA ANNUAL SUMMARY
SUMMARY OF
OF RECREATIONAL
RECREATIONAL INTERVIEW
Bay:
Yaquina
Bay: Yaquina
Tideflat:
Point Tideflat: Coquille
Coquille Point
-1981 -~1982
No.
No. Diggers
Diggers Sampled
Sampled
No. Clams
Clams Sampled
Sampled
No.
No.
Digger Hours
Hours
No. Digger
Hours/trip
Hours/trip
Clams/trip
Clams/trip
Clams/hour
Clams/hour
Digger origin
origin (%)
(%)
Digger
Local
Local
State
State
Non-State
Non-State
Spec i es Comp.
Camp ~-(ll
Species
(%)
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Ciams/trip
~ Clams/trip
9" Butter
Butter
Cock le
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
C-lamslhour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Sfze
Camp. (x
( x size)
s i ze )
Size Comp.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
No. 1:1
Clams
No.
ams Measured
Measurea
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
1983
11
11
24
24
99
53
53
267
267
75.0
75.0
0.8
2,2
2.2
2.7
2.7
5.0
5.0
3.6
3.6
5.4
5.4
4.5
4.5
100
100
o
0
9.4
9.4
75.5
75.5
15.1
15.1
25.9
25.9
55.6
55.6
18.5
18.5
4.2
4.2
3.0
3.0
95.8
95.8
93.3
93.3
3.0
3.0
40.1
40.1
34.7
34.7
15.7
15.7
8.2
8.2
0.8
o
0
o0
o
0 -
1.4
1.4
o
0
0.1
0.1
0.2
0.2
0
2.1
2.1
0
4.7
4.7
0.2
0.2
o
-
1.2
1.2
-
-
o
27 27
147 147
33.0
33.0
o0
-
2.2
2.2
1.9
1.9
0.9
0.9
0,4
0.4
-
0.1
0.1
0.1
0.1
2.6
2.6
3.3
3.3
0.1
0.1
1.8
1.8
1,6
1.6
0.7
0.7
0,4
0.4
-
-
-
o
0
o0
88.0
88.0
o0
93.6
93.6
-
-
94.5
94.5
-
96.6
96.6
61.3
61.3
11
55
23
23
142
142
22
22
51
51
15
15
12
12
o0
o
0
-
*
-
o0
74.9
74.9
47.2
47.2
98.9
98.9
45.9
45.9
44
-
-
19
19
19
19
19
I
19
19
19
19
Table
13. ANNUAL
ANNUAL SUMMARY
SUMMARY
Table 13.
RECREATIONAL INTERVIEW
INTERVIEW DATA
DATA
OF RECREATIONAL
Bay: Yaquina
Yaqu;na
Bay:
Tideflat: Critser's
Critser's Island
Island
Tideflat:
ii*
1983
No. Diggers
Diggers Sampled
Sampled
No.
No.
Sampled
No. Clams
Clams Sampled
No. Digger
Digger Hours
Hours
No.
Hours/tri
p
Hours/trip
Clams/trip
Clams/trip
C1 ams/hour
Clams/hour
Digger
origin (%)
(%)
Digger origin
42
42
1,380
1,380
56
56
1.3
1.3
32.9
32.9
24.6
24,6
Non-State
Non-State
Species
Compo (%)
(%)
Species Conip.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Clams/trip
Clams/trip
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshe 11
Softshell
Clams/hour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Size
Compo (x
(x size)
size)
Size Comp.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Soft shell
Softshell
No. Clams
Clams Measured
Measured
No,
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
0
0
Local
Local
State
State
I
N
.......
I
40.5
40.5
59.5
59.5
00
00
0
0
00
100.0
100.0
0
0
0
0
0
0
0
0
32.9
32.9
a0
a0
0
0
0
0
24
2466
a
0
0
0
0
0
0
82.5
82.5
00
0
0
00
00
56.9
56.9
Ii
19
19
I!
19
19
I!
19
19
I!
19
I!
U
1 9--r9
19
19
Table
Table 14.
14.
ANNUAL SUMMARY
SUMMARY OF
OF RECREATIONAL
RECREATIONAL INTERVIEW
INTERVIEW DATA
DATA
ANNUAL
Tideflat:
North Shore
Shore
Tideflat: North
Bay: Alsea
Alsea
Bay:
1982
I
"
;0
I
No. Diggers
No.
Diggers Sampled
Sampled
No.
Clams Sampled
Sampled
No. Clams
No.
Digger Hours
Hours
No. Digger
Hours/tri p
Hours/trip
Clams/trip
Clams/trip
Cl ams/hour
Clams/hour
Digger origin
origin (%)
(%)
Digger
Local
Local
State
State
Non-State
Non-State
Species
Compo (%)
(%)
Species Comp.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Litt
1eneck
Littleneck
Softshell
Softshell
Clams/trip
Clams/trip
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Clams/hour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Size Comp.
Compo (x
(x size)
size)
Size
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Litt leneck
Littleneck
Softshell
Softshell
No.
Clams Measured
Measured
No. Clams
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Litt
leneck
Littleneck
Softshell
Softshell
Ii*I19
1983
3
44
3
71
71
22
22
6.0
6.0
1.5
1.5
17.8
17.8
11.8
11.8
4.5
4.5
1.5
1.5
7.3
7.3
4.9
4.9
100.0
100.0
00
00
0
0
100.0
100.0
00
00
100.0
100.0
00
0
0
00
90.9
90.9
0
0
4.6
4.6
4.6
4.6
-
00
17.8
17.8
00
00
-
00
11.8
11.8
0
0
0
0
-
00
80.1
80.1
00
00
-
0
0
39
39
0
0
00
-
0
0
6.7
6.7
00
0.3
0.3
0.3
0.3
00
4.4
4.4
0
0
0.2
0.2
0.2
0.2
-
71.0
71.0
-
39.0
39.0
58.0
58.0
-
20
20
-
11
11
19
I'
19
19
19
19
1~
I'
12
19
19
19
Table 15.
15.
Table
ANNUAL SUMMARY
INTERVIEW DATA
DATA
ANNUAL
SUMMARY OF
OF REl.".:.ATIONAL
REL.ATIONAL INTERVIEW
Bay:
Bay: Alsea
Alsea
Tideflat: Bayshare
Bayshore
Tideflat:
1982
1982
1983
1983
No. Diggers
Diggers Sampled
Sampled
No.
No. Clams
Clams Sampled
Sampled
No.
No. Digger
Digger Hours
Hours
No.
Hours/trip
Hours/trip
Clams/trip
Clams/trip
Clams/hour
Clams/hour
32
32
529
529
46
46
1.4
1.4
16.5
16.5
11.5
11.5
24
24
316
316
39.5
39.5
1.7
1.7
13.2
13.2
8.0
8.0
Loca 1
Local
State
State
Non-State
Non-State
Species
Compo (%)
(%)
Species Comp.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshe 11
Softshell
r!., Clams/trip
Clams/trip
~
Butter
Butter
Cock
le
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Clams/hour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Size
Size Comp,
Compo (x
(x size)
size)
Butter
Butter
Cock
le
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
No.
Clams Measured
Measured
No. Clams
Butter
Butter
Cock le
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
59.4
59.4
25.0
25.0
15.6
15.6
66.7
66.7
25.0
25.0
8.3
8.3
origin (%)
(%)
Digger origin
DTger
-
99.8
99.8
0.2
0.2
-
99.7
99.7
-
-
-
-
0.3
0.3
r
-
16.5
16.5
<0.1
<0.1
-
-
11.5
11.5
<0.1
<0.1
--­
-
-
72.9
72.9
-
13.1
13.1
-
-
<0.1
<0.1
-
8.0
8.0
-
<0
1
<0.1
-
76.4
76.4
-
-
-
-
-
-
-
-
159
159
295
295
-
-
-
-
-
-
19
19
19
19
19
19
19
19
19
19
19
19
19
19
19
19
19
19
19
19
Table 16.
Table
16.
ANNUAL
SUMMARY OF
INTERVIEW DATA
DATA
ANNUAL SUMMARY
OF RECREATIONAL
RECREATIONAL INTERVIEW
Bay: Alsea
Tideflat:
Softshell
Tideflat: Softshell
1984
1983
No. Diggers
Diggers Sampled
Sampled
No,
No. Clams
Clams Sampled
Sampled
No.
No. Digger
Digger Hours
Hours
No.
Hours/trip
Höurs/trip
Clams/trip
Clams/trip
Cl ams/hour
Clams/hour
Digger
origin (%)
("%)
Digger origin
Local
Local State
State Non-State
Non-State
Species
Species Cornp.
Compo (%1
(%)
Butter
Butter
Cockle
Cockle
Gaper
Gaper
littleneck
Littleneck
Softshell
Softshell
~ C
1ams/tr'i p
Clams/trip
Butter
l' Butter
Cock le
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Clams/hour
Cl
ams7hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Size
Comp: (x
(XSfie)
Size Comp.
size)
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
No.
Measurea
No, Clams
Clams Measured
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
---.;;..,;;.­
4
4
91
91
6.0
6.0
1,5
1.5
22.8
22.8
15.2
15.2
50.0
50.0
50.0
50.0
o0
100.0
100.0
22.8
22.8
15.2
15.2 96.8
96.8
86.0
86.0 19
I!
19
19
C
19
C
I?
19
19
C
C
19
C
19
C
19
19
Table 17.
Table
17.
Bay
: S
ius 1aw
Bay:
Siuslaw
No. Diggers
Diggers Sampled
Sampled
No.
No.
Sampled
No. Clams
Clams Sampled
No. Digger
Digger Hours
Hours
No.
Hours/trip
Hours/trip
Clams/trip
Clams/trip
Clams/hour
Clams/hour
Digger origin
origin (%)
(%)
Digger
Local
Local
State
State
ANNUAL
INTERVIEW DATA
DATA
ANNUAL SUMMARY
SUMMARY OF
OF RL"EATIONAL
REEATIONAL INTERVIEW
1977
I7I . - T978-
E71
1971
1976
IyL.
3,203
3,203
72,756
72,756
4,844
4,844
39
39
1,067
1,067
54
54
1.4
1.4
27.4
27.4
19.8
19.8
51
51
1,426
1,426
101
101
2.0
2.0
28.0
28.0
14.1
14.1
12.8
12.8
84.6
84.6
2.6
2.6
28.8
28.8
66.7
66.7
4.4
4.4
1.5
1.
22.7
22.7
15.0
15.0
-
Non-State
Non-State
species1:Omp.
(%)
Species Comp. (%)
Butter
Butter
Cockle
Cockle
Gaper
Gaper
*
Litt
1eneck
Littleneck
Softshe
11
100.0
100.0
100.0
100.0
Softshell
100.0
100.0
Clams/trip
Clams/trip
~
Butter
Butter
...
Cockle
Cockle
Gaper
Gaper
*
Litt leneck
Littleneck
Softshe 11
22.7
27.4
22.7
27.4
28.0
28.0
Softshell
Clams/hour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
*
Littleneck
Littleneck
Softshell
15.0
19.8
14.1
15.0
19.8
14.1
Softshell
Size
size}
Size Comp:-[X
Comp. (x size)
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshe11
Softshell
96.5
107.4
96.5
107.4
ams Measured
Measured No. Clams
Butter Butter
Cockle Cockle
*
Gaper
Gaper
Littleneck
Littleneck Softshell
741
408
Softshell
741
408
!/ Includes
Includes digging
digging on
on west
west side,
side, east
east side
side and
and
21
21
670
670
31.5
31.5
1.5
31.9
31.9
21.3
21.3
1.5
28.6
28.6
71.4
71.4
I979- 1980-198rT98,
ii:t.
IIt)
L1W
42
42
1,140
1,140
55.3
55.3
1.3
1.3
27.1
27.1
20.6
20.6
19.0
19.0
47.6
47.6
33.3
33.3
77
188
188
5.0
5.0
115
115
3,445
3,445
145.2
145,2
0.7
26.9
26.9
37.6
37.6
28.6
28.6
71.4
71.4
0.7
o0
33
33
1,163
1,163
32.0
32.0
30.0
30.0
23.7
23.7
41.7
41.7
31.3
31.3
35.2
35.2
36.3
36.3
38.3
38.3
48.7
48.7
47.6
47.6
52.4
52.4
51.5
51.5
42.4
42.4
1.3
1.3
-
-
-
*
-
-
-
-
-
-
-
-
100.0
100.0
100.0
100.0
100.0
100.0
-
-
-
-
-
-
27.1
27.1
1.3
1.3
o
0
13.0
13.0
-
-
1983~9
21
21
875
875
28
28
-
31.9
31.9
Tideflat: North
North Fork1!
Fork l /
Tideflat:
1.0
1.0
9.1
9.1
-
-
-
-
-
-
-
-
100.0
100.0
100.0
100.0
100.0
100.0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
26.9
26.9
30.0
30.0
41.7
41.7
-
35.2
35.2
-
-
-
*
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
21.3
21.3
20.6
20.6
-
-
-
-
-
-
-
-
99.0
99.0
89.5
89.5
37.6
37.6
23.7
23.7
31.3
31.3
-
36.3
36.3
-
-
-
-
-
-
-
-
-
-
-
-
-
-
90.0
90.0
89.4
89.4
90.7
90.7
-
92.8
92.8
-
-
*
-
*
-
-
-
-
-
*
-
-
*
-
*
*
-
-
335
676
110
1,629
757
867
110
1,629
757
335
676
in North
North Fork
Fork of
in
of Siuslaw
Siuslaw &
& near
near Florence.
Florence.
19
19
Table 18.
Table
18.
ANNUAL SUMMARY
SUMMARY OF
OF RECREATIONAL
RECREATIONAL INTERVIEW
INTERVIEW DATA
DATA
ANNUAL
Tideflat: Softshel
Softshell1
Tideflat:
Bay:
Umpqua
I&1Hhj.LLJ
1983
No. Diggers
Sampled
No.
Diggers Sampled
No. Clams
Clams Sampled
Sampled
No.
No. Digger
Digger Hours
Hours
No.
Hours/trip
Hours/trip
Clams/trip
Clams/trip
Clams/hour
Clams/hour
Digger origin
origin (%)
(%)
DVgger
Local
Local
State
State
Non-State
Non-State
Spec
i e-s Comp.
Comp. T%)
Species
(%)
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Li
tt 1eneck
Littleneck
Softshell
Softshell
~ Clams/trip
Cl ams/tri p
r;-'
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Litt
leneck
Littleneck
Softshell
Softshell
ClamS/hour
Clams/hour
Butter
Butter
Cock
le
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshe11
Softshell
Compo (x
(x size)
s;zel
Size
Size Comp.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
No. Clams
Clams Measured
No.
Measurea
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
22
72
72
4.0
4.0
2.0
36,0
36.0
18.0
18.0
2.0
o0
0
o
100.0
100.0
100.0
100.0
c
36.0
36.0
18.0
18.0
-
-
19
I!
19
19
19
19
19
19
It
-19-··19I?
I
.-~----yg
It
Table
19.
Table 19.
ANNUAL SUMMARY OF
ANNUAL
OF RE
RE~ ~ATIONAL
INTERVIEW DATA
DATA
AT1ONAL INTERVIEW
Tidef1at:
Tideflat:
Bay:
Coos
Bay: Coos
LI*
No.
Diggers Sampled
Sampled
No. Diggers
No. Clams
Clams Sampled
Sampled
No.
No.
No. Digger
Digger Hours
Hours
ROlJrs/tri p
Hours/trip
C1
ams/tri p
Clams/trip
C1
ams/hour
Clams/hour
Oigger origin
origin (%)
(%)
Digger
Local
Local
State
State
Non-State
Non-State
SpeCieS1:omp.
(% )
Species Comp. (%)
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshe
11
Softshell
Clams/trip
~ C
1Cl.ms/tri p
Butter
'f
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Cl
ams!hour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Litt
Littleneck
1eneck
Softshe11
Softshell
Size Comp.
Compo (x
(x size)1!
size}l!
Size
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Litt leneck
Littleneck
Softshe11
Softshell
No. Clams
Clams Measured1!
Measured l !
No.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Litt
leneck
Littleneck
Softshell
Softshel 1
1/ Not
1/
Not taken
taken
66
101
101
4.5
4.5
0.8
0.8
16.8
16.8
22.4
22.4
100.0
o
o
0
0
4,0
4.0
19.8
19.8
69.3
69.3
6.9
6.9
o
0
0.7
0.7
3.3
3.3
11.7
11.7
1.2
1.2
o0
0.9
0.9
4.4
4.4
15.6
15.6
1.6
1.6
o
0
I!
I!
I!
's Marina
- South
South Slough
Sl
Hanson's
Marina I!
I!
Table 20.
20.
Table
ANNUAL
SUMMARY OF
INTERVIEW DATA
DATA
ANNUAL SUMMARY
OF RECREATIONAL
RECREATIONAL INTERVIEW
Bay: Coos
ii
No. Diggers
Diggers Sampled
Sampled
No.
No. Clams
Clams Sampled
Sampled
No.
No. Digger
Digger Hours
Hours
No.
Hours/trip
Hours/trip
Clams/trip
Clams/trip
Clams/hour
Clams/hour
origin (%)
(%)
Digger
Digger origin
I
~
I
Local
Local
State
State
Non-State
Non-State
Species
Compo (%)
{~
Species Comp.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Soft
shell
Clams/trip
Clamsltrip
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Soft
shell
Softshell
ClamS]
ho ur
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Size
Compo (x
(x size)
size)
Size Comp.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
No.
No. Clams Measured
Measured
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Sofshell
--~~
Tideflat: Charleston
Charleston Trianqle
Triangle
Tideflat:
1983
40
771
771
44
44
1.1
1.1
19.3
19.3
17.5
22.5
22.5
72.5
72.5
5.0
5,0
19.6
19.6
55.1
55.1
3.9
3.9
23.2
23,2
o0
3.8
3.8
10.6
10.6
0.8
0.8
4.5
4.5
o0
3.4
3.4
9.7
9.7
0.7
0.7
4.1
4.1
o0
73.3
73.3
51.2
51.2
88.6
88.6
55.2
55.2
o0
39
39
45
45
26
26
18
18
00
m
l.9
19
I.'
19
19
19
19
19
19
19
19·
19
Table
21.
Table 21,
ANNUAL SUMMARY
INTERVIEW DATA
DATA ANNUAL
SUMMARY OF
OF RECREATIONAL
RECREATIONAL INTERVIEW
Bay: Coos
Tideflat:
Charleston Flat
Flat Tideflat: Charleston
1983
No.
Diggers Sampled
Sampled
No, Diggers
No. Clams
Clams Sampled
Sampled
No.
No.
Digger Hours
Hours
No. Digger
Hours/trip
Hours/trip
Clams/trip
Clams/trip
Cl ams/!1our
Clams/hour
Digger orTqin
(TJ
Diqqer
origin (%)
Local
Local
State
State
Non-State
Non-State
Species Comp.
(%)
Species
C6m~f)
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
I
Softshell
Softshell
t; CTãs/trip
Cl ams/tr; p
I
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshe11
Softshell
CTamsTfiour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
(x size)
size)
Size
Size Compo
Comp. (x
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Soft
she11
Softshell
No. Clams
Clams Measured
Measured
No.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Li tt 1eneck
Softshell
Softshell
60
60
859
859
124.5
124.5
2.1
2.1
14.3
14.3
6.9
6.9
21.7
21.7
73.3
73.3
5.0
5.0
2.0
2.0
46.6
46.6
38.8
38.8
10.6
10.6
a0
0.3
0.3
6.7
6.7
5.6
5.6
1.5
1.5
a
0
0.1
0.,1
3.2
3.2
2.7
2.7
0.7
0.7
a
0
84.0
84.0
59.9
59.9
100.6
100.6
55.0
55.0
a0
11
38
38
13
13
33
a
0
19
19
19
I!
19
19
I!
19
19
I?
19
19
I!
19
19
Table
22.
Table 22,
ANNUAL
INTERVIEW DATA
DATA
ANNUAL SUMMARY
SUMMARY OF
OF RECREATIONAL
RECREATIONAL INTERVIEW
Tideflat:
Peterson Flat
Flat
Tideflat: Peterson
Bay: Coos r983
No. Diggers
Diggers Sampled
Sampled
No.
No.
Sampled
No. Clams
Clams Sampled
No. Digger
Digger Hours
No.
Hours
Hours/trip
Hours/trip
Clams/trip
Clams/trip
Cl
ams/hour
Clams/hour
Uigger
origin (%)
(%)
Digger origin
~
0'1
I
Local
Local
State
State
Non-State
Non-State
Compo (%)
(%)
Species
Species Comp.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Clams/trip
C
1amsltri p
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Litt
1eneck
Littleneck
Softshell
Softshell
Clams/hour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Size Comp.
Compo (x
(x size)1/
size)l/
S1ze
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littl
eneck
Littleneck
Softshell
Softshell
No.
Clams Measured1!
Measured 1 /
No, Clams
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshel 1
Softshell
iken
l!/ Not
Not '1ken
12
12
235
235
23.5
23.5
2.0
2.0
19.6
19.6
10.0
10.0
25.0
25.0
75.0
75.0
0
0
8.1
8.1
21.
7
21.7
45.1
45.1
25.1
25.1
00
1.6
1.6
4.3
4.3
8.8
8,8
4.9
4.9
0
0
0.8
0.8
2.2
2.2
4.5
4.5
2,5
2.5
0
0
-----rg-C
1~,
19
C
19
C
19
C
19
C
19
C
19
C
19
C
C
19
19
Table
23.
Table 23.
ANNUAL SUMMARY
I
VIEW DATA
DATA
ANNUAL
SUMMARY OF
OF REL"c.ATIONAL
RELcATIONAL INTERVIEW
Tidef1at: Pigeon
Pigeon Point
Point
Tideflat:
Bay: Coos
Coos
Bay:
1983~9
No.
Diggers Sampled
Sampled
No. Diggers
No. Clams
Sampled
No.
Clams Sampled
No.
Hours
No, Digger
Digger Hours
Hours/trip
Hours/trip
Clams/trip
Clams/trip
Clams/hour
Clams/hour
Digger Origin
origin (%)
(%)
Digger
Local
Local
State
State
Non-State
Non-State
Spec
i esTomp.
(%)
Species
Comp. (%)
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
CTams/trip
Cfãihs/trip
I
W
Butter
Butter .....
I
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Clams7hour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Size
(x size)1!
size)l!
Size Compo
Comp. (x
Butter
­
Butter
Cockle
Cockle
Gaper
Gaper
Litt
1eneck
Littleneck
Soft
she 111
Softshel
No. Clams
Clams Measured1!
Measured l / No.
Butter
­
Butter
Cockle
Cockle Gaper
Gaper Littleneck Littleneck
Softshell
Softshel 1 1/ Not
1/
Not taken
taken
65
65
1,003
1,003
133
133
2.1
2,1
15.4
15.4
7,5
7.5
36.9
36.9
53.9
53.9
9.2
9.2
32.0
32.0
0.5
0.5
51.4
51.4
16.0
16.0
o
0
4.9
4.9
0.1
0.1
7.9
7.9
2.5
2.5
o0
2.4
2.4
<
0.1
<0.1
3.9
3.9
1.2
1.2
o
0
19
19
19
19
19
19
19
n---yg--Tg------rg
Table
Table 24.
24.
ANNUAL
INTERVIEW DATA
DATA
ANNUAL SUMMARY
SUMMARY OF
OF RECREATIONAL
RECREATIONAL INTERVIEW
Bay:
Coos
Bay: Coos
Tideflat: Sitka
Sitka Flat
Flat
Tideflat:
1983
No. Diggers
Diggers Sampled
Sampled
No.
No. Clams
Sampled
No.
Clams Sampled
No.
Hours
No. Digger
Digger Hours
Hours/trip
Hours/trip
Clams/trip
Clams/trip
Clams/hour
Clams/hour
Digger
origin (%)
(%)
Digger origin
I
~
I
Local
Local
State
State
Non-State
Non-State
SpeC:ies-Comp.\TJ
Species
Comp. (%)
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Clams/trip
ClamsTtrip
Butter
Butter
Cock
le
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Clams/hour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Litt
1eneck
Littleneck
Softshell
Softshell
Size Comp.
Compo (x
(x size)
size)
Size
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshe 11
Softshell
No. Clams
Clams Measured
Measured
No,
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshe
11
Softshell
46
46
678
678
81.5
1.8
14.7
14.7
8.3
8.3
1.8
58.7
58.7
41.3
41.3
o0
19.8
1.0
1.0
50.9
50.9
28.2
28.2
o0
2.9
2,9
0.2
0.2
7.5
7.5
4.2
4.2
o0
1.6
1.6
0.1
0.1
4.2
4.2
2.3
2.3
o0
85.9
85.9
37.9
37.9
108.0
108.0
67.2
67.2
o0
44
44
77
46
46
99
o0
-------r9~9--
I!
19
19
19
19
19
19
19
19
19
Table
25.
Table 25.
ANNUAL
INTERVIEW DATA
ANNUAL SUMMARY
SUMMARY OF
OF RECREATIONAL
RECREATIONAL INTERVIEW
DATA
Bay: Coos
Tideflat: Empire
Empire Flat
Flat
Tideflat:
1983
No.
Diggers Sampled
Sampled
No. Diqgers
No.
Clams Sampled
Sampled
No. Clams
No.
Digger Hours
Hours
No. Digger
Roursltrip
1urs/trip
Clams/trip
Clams/trip
Cl
ams/hour
Clams/hour
Digger origin
origin (%)
(i)
Digger
Local
Local
State
State
Non-State
Non-State
Species
Camp. (%)
(%)
Species Camp.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
~ Cl
amsltri p
Clams/trip
'F
'f
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Li
tt 1eneck
Littleneck
Softshell
Softshell
Cl amslhour
Clams/hour
Butter
Butter
Cock le
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Size
Camp. (x
(x size)1/
size)!!
Size Camp.
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Litt 1eneck
Littleneck
Softshell
Softshel 1
No.
Measuredll
No. Clams
Clams Measured1/
Butter
Butter
Cock1lee
Cock
Gaper
Gaper
Littleneck
Li ttleneck
Soft
she 111
Softshel
'1/
:.../
Not taken
taken
Not
70
70
1,057
1,057
99
99
1.4
1.4
15.1
15.1
10.7
10.7
54.3
54.3
34.3
34.3
11.4
11.4
1.4
1.4
11.2
11.2
58.8
58.8
0.3
0.3
00
0.2
0.2
1.7
1.7
8.9
8.9
0.1
0o
<
<0.1
0.2
0.2
1.2
1,2
6.3
6.3
<
0.1
<0.1
00
19
19
19
19
I.'
u-----rg
u 19
urg--
T9-~
19
19
19
Table
26.
Table 26.
ANNUAL
SUMMARY OF
RECREATIONAL INTERVIEW
INTERVIEW DATA
DATA
ANNUAL SUMMARY
OF RECREATIONAL
Tideflat:
North Spit
Spit
Tideflat: North
Bay:
Coos
Bay: Coos
1983
No. Diggers
Diggers Sampled
Sampled
No.
No.
Sampled
No, Clams
Clams Sampled
No. Digger
No.
Digger Hours
Hours
Hours/trip
Hours/trip
C1
ams/tri p
Clams/trip
Cl
ams/hour
Clams/hour
Digger origin
origin (%)
(%)
Digger
I
.+::­
0
I
Local
Local
State
State
Non-State
Non-State
Species Comp.
Compo (%)
(%)
Species
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Clams/trip
Clams/trip
Butter
Butter Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshe
11
Softshell
C1
ams/hour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Size
Compo (x
(x size)
size)
Size Comp,
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
No. Clams
No.
Clams Measured
Measured
Butter
Butter
Cock le
Cockle
Gaper
Gaper
Littleneck
Littleneck
Soft
she 11
Softshell
65
65
692
692
93
93
1.4
1.4
10.7
10,7
7.4
7.4
72.3
72.3
27.7
27.7
00
3.5
3.5
17.6
17
.6
75.3
75.3
3.6
3.6
0
0
0.4
0.4
1.9
1.9
8.0
8,0
0.4
0.4
00
0.3
0.3
1.3
1.3
5.6
5.6
0.3
0.3
0
0
00
67.7
67.7
109.6
109.6
72.0
72.0
00
00
20
20
185
185
22
00
19
19
19 19
--r9
19
---r9 _ .. 19-··-r9
19
19
Table
27.
Table 27.
ANNUAL
INTERVIEW
ANNUAL SUMMARY
SUMMARY OF
OF RElKEATIONAL
RELKEATIONAL INTERVIEW
DATA
Bay: Coos
Tideflat: Clam
Tideflat:
Clam Island
Island
1983
I
....
.J:>o
I
No.
Diggers Sampled
Sampled
No. Diggers
No. Clams
Clams Sampled
Sampled
No.
No. Digger
No.
Di9ger Hours
Hours
Hours/trip
Hours/trip
Clams/trip
Clams/trip
Clams/hour
Clams/hour
Digger origin
origin (%)
(%)
Digger
Local
Local
State
State
Non-State
Non-State
Species Comp,
Compo (%)
(%)
3pecies
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Clams/trip
Clams/trip
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Cl
ams/hour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Size Comp.
Compo (x
(x size)
size)
Size
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
No. Clams
Measured
No.
Clams Measured
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Litt
leneck
Softshell
Softshell
57
57
1,002
1,002
82
82
T4
1.4
17.6
17.6
12.2
12.2
36.8
36.8
57.9
57.9
5.3
5.3
2.8
2.8
36.5
36.5
54.2
54.2
1.1
1.1
5.4
5,4
0.5
0.5
6.4
6.4
9.5
9.5
0.2
0.2
1.0
1.0
0.3
0.3
4.5
4.5
6.6
6.6
0.1
0.1
0.7
0.7
78.7
78,7
54.1
54.1
107.7
107.7
55.5
55.5
00
6
6
88
46
46
4
4
0
0
19
19
19
I.'
19
19
19
1-9~
-----rg
19
.~ 19~
19
Table
Table 28.
28.
ANNUAL SUMMARY
SUMMARY OF
OF RECREATIONAL
RECREATIONAL INTERVIEW
INTERVIEW DATA
DATA
ANNUAL
Tideflat:
Bandon Softshell
Softshell
Tideflat: Bandon
Bay: Coquille
Coqui 11 e
Bay:
1983~~
II*
No. Diggers
Diggers Sampled
Sampled
No.
No.
Sampled
No. Clams
Clams Sampled
No. Digger
Digger Hours
Hours
No.
Hours/trip
Hours/trip
Cl
ams/tri p
Clams/trip
Clams/hour
Clams/hour
Digger origin
ifrigin (%)
(%)
I
~
I
Local
Local
State
State
Non-State
Non-State
Spec i es Comp.
Comp: (%)
(l)
Species
Butter
Butter
Cock
le
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshe11
Softshell
Clams/trip
Clams/trip
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshell
Softshell
Cl
amSlhour
Clams/hour
Butter
Butter
Cockle
Cockle
Gaper
Gaper
Littleneck
Littleneck
Softshe11
Softshell
Size "Comp.
(x size)1/
sizerr7
Size
Comp. (x
Butter
­
Butter
Cockle Cockle
Gaper
Gaper
littleneck
Littleneck Softshell
Softshel 1
-No.
Clams Measured1!
Measured l ! No. Clams
Butter
­
Butter
Cockle
Cock
1 e Gaper Gaper
Littleneck Littleneck
Softshe11 Softshell
........
-.~-
.. - . ­
1/ No,
No.
-.
~aken
.aken
66
215
215
55
0,8
0.8
35.8
35.8
43.0
43.0
100.0
100.0
o0
o
0
o0
o0
o0
o0
100.0
100.0
o
o
0
0
0
0
o
o
35.8
35.8
o0
o0
o
0
o0
43.0
43.0
I!
19
19
19
19
19
19
19
I.'
19
19
19
Table 29.
Table
29.
Summary
Summary of
of pounds
pounds of
of Bay
Clams Reported
Reported Harvested
Harvested in
in Oregon~
Oregon,
Bay Clams
1970-83.
1970-83.
Year
Year
Butter
Butter
Cockle
Cockle
Gaper
Gaper
1970
1970
885
885
12,257
12,257
1,218
1,218
863
863
10,661
10,661
00
25,884
25~884
1971
1971
217
217
9,391
9,391
10,345
10,345
639
639
7,714
7,714
220
220
28,526
28,526
1972
1972
52
52
7,269
7,269
34,006
34,006
1,406
1,406
18,772
18,772
00
61,505
61,505
1973
1973
95
95
5,756
5,756
185
185
9,771
9,771
1,349
1,349
00
17,156
17,156
1974
1974
412
412
6,073
6,073
00
8,987
8,987
843
843
00
16,315
16,315
1975
1975
0
0
6,855
6,855
15,024
15,024
4,311
4,311
360
360
00
26,550
26,550
1976
1976
816
816
322
322
85,831
85,831
455
455
630
630
00
88,054
88,054
1977
1977
607
607
859
859
81,775
81,775
232
232
1,366
1,366
894
894
85,733
85,733
1978
1978
1,452
1,452
6,717
6,717
207,685
207,685
1,056
1,056
16
16
00
216,926
216,926
1979
1979
606
606
2,299
2,299
91,028
91,028
00
979
979
0
0
94,912
94,912
1980
1980
40
40
2,244
2,244
74,459
74,459
4,268
4,268
456
456
0
0
81,467
81,467
1981
1981
2,409
2,409
4,580
68,508
4,892
4,892
749
749
00
81,138
81,138
1982
1982
3,654
3,654
10,517
10,517
106,440
106,440
13,231
13,231
248
248
00
134,105
134,105
1983
1983
4,035
4,035
2,579
2,579
95,091
95,091
34,444
34,444
36
36
00
136,185
136,185
Littieneck
Littleneck
-43-43­
Softshell
Softshell
Macoma
Macoma
Total
Total
Table 30.
30. Summary of
Table
of Reported
Reported Commercial
Clams in
Commercial Harvest
Oregon
in Major
Major Oregon
Harvest of
of Bay
Bay Clams
Estuaries,
Estuaries, 1969-83.
1969-83.
Year
Year
Neha1em
Ti 11 amook
Nehalem Tillamook
Netarts
Netarts
Yaguina
Yaguina
Alsea
Alsea
Siuslaw
Siuslaw
LJmpgua
Um~gua
Coos
Coos
Total
Total
1970
1970
258
258
7,819
7,819
2,210
2,210
444
444
00
00
10,631
10,631
4,522
4,522
25,884
25,884
1/
19711/
1971
589
589
5,948
5,948
1,598
1,598
1,819
1,819
0
0
00
7,459
7,459
10,893
10,893
28,306
28,306
1972
1972
80
80
9,637
9,637
914
914
57
57
70
70
0
0
6,105
6,105
44,642
44,642
61,505
61,505
1973
1973
329
329
11,997
11,997
1,191
1,191
0
0
0
0
0
0
786
786
2,853
2,853
17,156
17,156
19741/
1974 1/
882
882
9,309
9,309
2,409
2,409
398
398
00
00
445
445
3,232
3,232
16,675
16,675
19751/
1975 1/
00
4,637
00
00
13
13
0
0
309
309
21,553
21,553
26,512
26,512
1/
19761/
1976
00
820
820
00
00
480
480
00
00
86,529
86,529
87,829
87,829
1/
19771/
1977
00
1,881
1,881
0
0
71,013
71,013
0
0
00
35
35
12,066
12,066
84,995
84,995
1/
19781/
1978
00
2,905
2,905
00
172,047
172,047
00
00
00
41,804
41,804
216,756
216,756
1979
1979
174
174
433
433
0
0
74,565
74,565
0
0
3,432
3,432
0
0
16,308
16,308
94,912
94,912
1980
1980
373
373
5,320
5,320
486
486
244
244
0
0
9,109
9,109
00
65,935
65,935
81,467
81,467
1981
1981
65
65
4,259
4,259
00
128
128
00
684
684
00
76,002
76,002
81,138
81,138
1/
19821/
1982
10,862
10,862
11,501
11,501
37
37
15
15
00
223
223
25
25
111,427
111,427
134,090
134,090
1983
1983
31,856
31,856
3,144
3,144
200
200
5,253
5,253
00
15
15
00
95,717
95,717
136,185
136,185
1/
1/
Astoria, Bandon
Bandon and
and
Totals exclude
exclude landings
landings of
clams reported
reported from
from Columbia
Columbia River,
River, Astoria,
Totals
of clams
Port Orford.
Orford.
Port
-44-44­
100
I00
1980
N::O
80
BC
60
£0
NO COMMERCIAL HARVEST
40
20
0
80
1979
N::: 748
1983
1978
N= 918
1982
N= 100
60
40
W
<.!)
<:!
I­
Z
W
20
0
<.)
a::
W
0..
i
I
50
SO
I
N=O
60 I
NO COMMERCIAL HARVEST
40 I
I
20
1
:
0
I
1977
N;: 1356
80
1981
N=O
60
NO COMMERCIAL HARVEST
40
40!
20
-
r1
i
_I
_I_
1
0 L
O~--~~~~~L-L~C===~----~--------------------------J
1977
1977
75
T3
73
71
71
69
67
65
YEAR-CLASS
Figure 1.
Figure
1.
1981
t981
79
77
75
73
71
71
69
YEAR
-CLASS
YEAR-CLASS
Age Composition
Composition of
Subtidal Gaper
Gaper Clam
Clam Harvest,
Harvest. Area
Area 2,
2.
Age
of Commercial
Comercial Subtidal
Yaquina Bay,
Bay. 1977-83.
1977-83.
Yaquina
-45­
-45-
100
80
1978
N"285
1982
N"271
1977
N" III
1981
N-47
1976
N-238
1980 N"297 60
40
20
0
80
60
40
I.IJ
(!)
20
20
~
I
.+:>0
m
I
ZO0
Z
I.IJ
Lii
(.)
ex:
80
I.IJ
Ui80
Q.
60
40
20
0
['1
1983
1979
NI312
1975
N=2129
80
N-99
60
40
20
01
0
1976
1976
.....J1....rJb
74
74
72
72
70
68
68
66
'fEAR-CLASS
YEAR-CLASS
Figure 2.
Figure
2.
64
,........jJIIClL...
62
62
60
60
1978
978
76
76
74
74
72
70
68
'fEAR-CLASS
YEAR-CLASS
'!!I!b
66
64
986
62 1986
8
84
82
80
78
76
74
72
70 'fEAR-CLASS
YEAR-CLASS Age
Subtidal Gaper
Gaper Clam
Clam Harvest,
Harvest, Pigeon
Pigeon Point,
Point, Coos
Coos Bay,
Bay, 1975-83.
1975-83.
Age Composition
Composition of
of Commercial
Commercial Subtidal
FAST GROWING BROOD STOCK
60
SLOW
n
..
NORMAL GROWING BROOD STOCK
50
4
40
I
Ii'
~ e
.....,
I
­
,.-----
%
....
30
I 3
(!)
CD
Z
z
Id bJ
-j ..J
,/,"
20
,,"
,."
-------------------------------
,."
.~/
./
./
./
. '//
10
~
..,."
0~1------.------r------.-----~-----.------.-----~------.------r------.------r------
o
10
20
30
40
50
60
70
80
90
100
110
A GE (months
(monthsotter
afterrelease)
release)
AGE
Figure 3.
3.
Figure
Growth Curve
Curve of
of Manila
Manila Littleneck
Littleneck Clams
Clams Spawned
Spawned and
Planted from
from Normal
Normal and
and Fast
Fast Growing
Growing
Growth
and Planted
Brood Stock,
Stock, Netarts
Netarts Bay,
Bay, 1974-83.
1974-83.
Brood
FENCED
UNFENCED
EELGRASS
60
50
-
..................................................._.. ............................................. ........~-..,......... .
E
E
E
I
~
co
I
-------------------- .~
-----------
-­
...... 40
-
:r:
...
t- 30
30
~
.'
.,'.'
......
....' ,""
.-
W
..J
",
, ' .'
"""
,-'
.",
",
20
", ", ", .tt.","
3'
~
10
o,
o
I
I
I
I
I
I
10
20
30
40
50
60
AGE
A(,t.
90
100
(monthsafter
after release)
release)
(months
Figure 4.
4. Growth
Growth Curve
Curve of
of Manila
Manila Littleneck
littleneck Clams
Clams Planted
Planted in
in Fenced
Fenced and
and Unfenced
Unfenced and
and Eelgrass
Eelgrass
Figure
1974-83.
Covered
of Netarts
Netarts Bay. 1974-83.
Covered Areas
Areas of
Bays
110
\ ......;
...
'­ ............. III
...
~
.....'
...
......" . ' Go.-.
c:.
..
~..,-~...,.-.-.,:
"'0;.
....
110,...
~\
-.;
TILL
T
I
L
L
' \ i.mj
rJ
'
~
M
f\ 0 0D<MJ1b
g
7 O K
M
A
4
IL__
t.
.,..~~. Sa]:' ~'"~
UJ
i II
\....
t;,
(ih
Y'......;
B
B
I
.po
\.0
I
PLOT NO.
NO.
2
3
4
5
LEGEND
LEGEND
DATE
NO. PLANTED
NO,
3-4-83
4-1683
4-16-83
6-16-83
6-30-83
2,000,000 set
set
2,000,000
1,000
1,000 adults
10,000
adults
lO,000adults
10,000
set
10,000 set
\\
~I
Yjy/
~P"
/'l'
(',
A
A
.1
\\
/
t )V/'
p.:;;
\
P"';
/),Ir.::
Mlddl.
C,..",../
M4d1. Chjnnt/
(shA1LLW)
(.lINSltMLLW)
:11
.;~,lj
vrlj
........
N_:
/
......
,..:t~
~.~~-'
~'"
MS
,4
1
'
:
S1
~:.
. ,. ,1":.. .
,
Figure 5.
5.
4,
Summary of t1anila
Clam Releases
Releases in
in Tillamook
Tillamook Bay,
Bay~ 1983.
1983.
Manila Littleneck Clam
-
100
80 1978 N=633 60 1982 N o ll8 r­
~
40 20 rfl--n
..r­
0
~
-
80 Ill_
r­
~
1977 N O I.759 1981 N-370 60 40 W
I
I
(JI
01
0
CI
(!)
(
20 t!ZZ
0
W
n.
~
c,)
a:
w 80 I&jeo
...­
1976 N=I.534 r-
Q..
0
1980 N°663 60 40 20 nJi.
00 80 '­
..-­
1975 N"2.178 r­
1979 N"667
1983 N-190 60 40 20 -
o
0 1979
1979
77
75 77 75
73
73
71
71
69
YEAR-CLASS
Figure
Figure 6.
6.
67
65
63
1982
1982
80
78
76 74
72
YEAR-CLASS
YEAR - CLASS
70
68
88
66
1986
84
1986 84
82
82
80
80
~
78
78
76
76
YEAR
- CLASS
YEAR-CLASS
Age Composition
Composition of
of Subtidal
Subtidal Gaper
Gaper Clams,
Clams. Area
Area 2,
2. Yaquina
Yaquina Bay.
Bay. 1975-83.
1975-83.
Age
74
74
72
72
70 70
...,.
.
~
\
i
:~
I
I
I
"
I
,,
L'
I
I
•I I
'e
I
,"
,. ,,, . , '
.....
_
........ -....
- - ......
... ......... ...."
\~,
-­ ....._­
I
I
,
I
,•
I
I
i
s4.
,
I4I ,
I
I
,,,
I
1
%
JC4
-%-
$$'
,,
'
..:
•\
\
\
-
liii
I
I "
J
LA
0
%
'
-',-
,,
I
I
\
,,
I
••
LEGEND
DENSITY
I
,,
I
I
I
1
I ,"';
,
\."
,
o
1-5 clams/ttZ
()
6- 10 clams / ftZ
•
> 10 clams /
tt Z
I
t
.
' '--Scal.
(fHI)
Fi gure 7.
Distribution and Abundance of Native Littleneck Clams in Nehalem Bay, 1983.
-51­
100
1983
98 3
SO
80
N ::670
670
UJ
LU
(!)
0
«
I­
Z
z
'
60
UJ 40
t.)
cr:
UJ
LU
a. 20
0
- ---- - --1984
82
80
78
76
72
YEAR-CLASS
YEAR - CLASS
Figure
8.
Figure 8.
Age Composition
Composition of
of Subtidal
Subtidal Native
Native Littleneck
littleneck Clams,
Clams, Nehalem
Nehalem Bay,
Bay,
Age
1983.
1983.
-52-52­
)
('
OREGON Fish,. Wi1dlif.
Post Office Box 3503
Portland, Oregon 97208
)