1
2
Table S2: Description of prey categories used in field observations for 2009 MSI puffin
chick diet and corresponding DNA taxa.
2009 Diet Method Comparison
Field
Observation
Prey Category
Butterfish
Observed
1995-2010 (#
Items)
350
Krill
5121
Hake
4580 + 270
(larval)
Urophycis tenuis, U. chuss,
and Enchelyopus cimbrius
Urophycis tenuis, Urophycis
sp., and
Enchelyopus cimbrius
Hake or Herring
1304
Fish belonging to ‘Hake’
group or Clupea harengus
N/A
Field-Observed Prey
Category Description
Peprilus triacanthus
Any krill (Euphausiacea) but
typically Meganyctiphanes
norvegica
DNA-Identified Taxa
Peprilus triacanthus
Meganyctiphanes norvegica,
Thysanoessa sp.
Clupea harengus
Clupea harengus
Pollock
6328 + 126
(larval)
63
Pollachius virens
Polychaete
132
Any Polychaete (Polychaeta)
Not detected
Nereis pelagica, Hediste
diversicolor, Polychaeta
Sandlance
2759 + 222
(larval)
Sculpin
5
Squid
Unidentified
Fish
Unidentified
Rock
Eel/Gunnel
Bluefish
Crustacean
Lumpfish
Stickleback
Atlantic Saury
Fish Scrap
Eelpout
Earthworm
N/A
N/A
N/A
N/A
N/A
N/A
85
3400 + 2480
(larval)
723
Herring
Typically Ammodytes
americanus, potentially A.
dubius
Fish that look like sculpin
(Cottoidea)
Any squid
Myoxocephalus aenaeus,
Hemitripterus americanus
Not detected
Any unknown fish
N/A
Any unknown item
N/A
1
Not detected
Pholis gunnellus
2
3
3
3
4
17
36
42
N/A
N/A
N/A
N/A
N/A
N/A
Not detected
Not detected
Not detected
Not detected
Not detected
Not detected
Not detected
Not detected
Not detected
Ammodytes sp
Pomatomus saltatrix
Multiple species
Not detected
Not detected
Not detected
N/A
Not detected
Not detected
Hippolytidae
Melanogrammus aeglefinus
Liparis inquilinus
Gaidropsarus ensis
Sebastes fasciatus
Cryptacanthodes giganteus
2009 Diet Method Comparison
3
4
5
6
Field
Observed
Field-Observed Prey
Observation
1995-2010 (#
DNA-Identified Taxa
Category Description
Prey Category
Items)
N/A
N/A
Not detected
Gadus morhua
N/A
N/A
Not detected
Brachycera
N/A
N/A
Not detected
Neoptera
Number of prey items identified from field observations of provisioning adults on Machias Seal
Island 1995-2010 (LEFT, [23]). Description of prey categories identified in 2009 field
observations and the associated DNA-identified taxa (RIGHT). Bolded prey: observed with one
method only.