Journal of Applied Ecology 2004/ 347 Supplementary Material
Power of monitoring programmes to detect decline and recovery of rare and
vulnerable fishes
DAVID MAXWELL and SIMON JENNINGS
Appendix S1. Trends in the mean numerical abundance of adult fishes sampled on the
North Sea groundfish survey. Continuous lines represent mean abundance estimates
for all sites and broken lines represents abundance estimates from fixed sites.
Appendix S2. Relationship between the powers to detect annual percentage increases
and decreases in abundance.
1
2
0
1
0
0
8
0
Anualincreaseinabundance(%)
6
0
4
0
2
0
0
0
1
0
2
0
3
0
4
0
A
n
n
u
a
ld
e
c
r
e
a
s
e
in
a
b
u
n
d
a
n
c
e
(
%
)
5
0
Appendix S3. Total number of stations sampled in each year of the survey. Twenty
three stations were sampled every year.
Year
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
Number of stations
69
67
77
71
75
73
70
79
79
84
74
71
73
72
72
74
74
74
75
74
75