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Table 1. Percentage of total stomach contents by weight of six functional prey groups for 170 species of fish and squid collected in the Northwest Atlantic. (The order of species follows the taxonomic index presented earlier.)
Predator Functional Prey Group
Fish Squid Polychaete Decapod
Crustacean		 Other
Crustacean		 All
Other
Northern shortfin squid 19.0 34.6 <0.1 0.4 16.2 29.8
Longfin inshore squid 13.7 5.6 <0.1 0.2 4.5 76.0
Atlantic hagfish 47.6 - - - - 52.4
Sand tiger 00.0 - - - - -
Bigeye thresher 3.5 15.1 - - - 1.4
Thresher shark 97.1 2.9 - - - -
White shark 27.0 - - - - 73.0
Shortfin mako 98.2 1.4 - - - 0.4
Longfin mako 91.9 4.9 - - - 3.2
Porbeagle 0.7 99.3 - - - -
Chain dogfish 49.5 20.7 6.3 10.0 12.4 1.1
Bignose shark 38.4 - - - - 61.6
Silky shark 57.5 32.3 - - - 10.2
Dusky shark 58.1 14.4 - 11.5 6.1 9.9
Sandbar shark 98.2 - - - - 1.8
Night shark 1.2 97.9 - - - 0.9
Tiger shark 57.6 0.3 - - - 42.1
Smooth dogfish 7.4 8.2 0.8 72.1 2.6 8.9
Blue shark 53.9 33.8 - - - 12.3
Atlantic sharpnose shark 80.0 5.2 - 8.3 1.4 5.1
Scalloped hammerhead 100.0 - - - - -
Smooth hammerhead 98.0 - - - - 2.0
Spiny dogfish 53.7 17.8 - 3.3 1.0 24.2
Atlantic angel shark 83.3 7.7 <0.1 0.2 0.1 8.8
Atlantic torpedo 100.0 - <0.1 - - -
Clearnose skate 57.8 0.6 0.4 38.6 0.8 1.8
Little skate 9.5 - 12.9 40.5 25.0 12.1
Rosette skate 1.7 2.6 0.7 81.8 9.9 3.3
Barndoor skate - - - 100.0 - -
Winter skate 66.2 7.0 8.5 4.8 2.6 10.9
Thorny skate 45.3 22.9 6.4 9.1 3.9 12.4
Smooth skate <0.1 - - 69.2 27.4 3.4
Southern stingray 0.7 - 0.3 98.7 0.3 -
Roughtail stingray 31.1 - <0.1 68.7 0.1 0.1
Bluntnose stingray 40.9 - 10.2 23.2 1.0 24.7
Spiny butterfly ray 6.9 - - - - 93.1
Bullnose ray <0.1 - 2.2 6.2 0.2 91.4
Cownose ray 90.7 - - 0.3 8.6 0.4
Margined snake eel - - 31.7 61.7 6.4 0.2
Slender snipe eel - - - - 100.0 -
Conger eel 96.5 - - - 0.1 3.4
Blueback herring - - - 0.9 49.6 49.5
Hickory shad - - - 100.0 - -
Alewife 1.7 0.1 - 2.5 86.2 9.5
American shad 16.3 1.1 - - 78.1 4.5
Atlantic menhaden - - - 0.5 49.3 50.2
Atlantic herring <0.1 - - <0.1 85.2 14.8
Round herring 32.8 - - 21.3 41.3 4.6
Atlantic thread herring - - - - - 100.0
Spanish sardine - - - - 100.0 <0.1
Striped anchovy 0.3 - 5.9 2.8 79.5 11.5
Atlantic argentine 10.3 0.5 1.0 1.6 70.8 15.8
Atlantic salmon - - 4.6 0.3 - 95.1
Shortnose greeneye - - 10.7 - 68.8 20.5
Inshore lizardfish 100.0 - - - - -
Offshore lizardfish 2.5 96.2 - 1.3 - -
Snakefish - - - - - 100.0
Longnose lancetfish 2.8 1.0 - 13.5 82.6 0.1
Lanternfish uncl. 6.2 - - 20.5 52.4 20.9
Hygophum taaningi - - 0.5 3.3 95.7 0.5
Mullers pearlsides - - - - 100.0 -
Cusk 15.5 0.1 <0.1 47.7 3.7 33.0
Fourbeard rockling - - 65.7 - 1.2 33.1
Atlantic cod 56.8 12.5 2.5 17.8 3.3 7.1
Haddock 3.0 1.1 14.1 2.9 15.4 63.5
Offshore hake - - - - 82.5 17.5
Silver hake 63.0 7.7 - 5.2 23.4 0.7
Pollock 54.1 23.5 - 2.6 18.3 1.5
Longfin hake 0.5 - - - 99.1 0.4
Red hake 21.7 5.7 2.6 25.9 37.4 6.7
Spotted hake 39.1 25.0 0.9 11.9 16.4 6.7
White hake 57.1 21.4 0.1 7.1 13.5 0.8
Marlin-spike - - 0.4 - 99.6 -
Longnose grenadier - - 80.1 2.9 10.9 6.1
Grenadier uncl. - - 16.7 - 27.3 56.0
Fawn cusk-eel 9.8 - 25.7 23.9 27.3 13.3
Striped cusk-eel - - - 70.3 29.7 -
Atlantic midshipman 68.9 23.2 - 2.8 5.1 -
Goosefish 73.9 24.9 - - - 1.2
Atlantic needlefish - - - - 100.0 -
Atlantic saury - - - - 45.6 54.4
Tidewater silverside - - - - 100.0 -
Buckler dory 100.0 - - - - -
Deepbody boarfish 3.3 - - - 43.1 53.6
Threespine stickleback 75.0 - - - 25.0 -
Red cornetfish 100.0 - - - - -
Cornetfish uncl. 26.7 - - - 73.3 -
Longspine snipefish - - - - 100.0 -
Northern pipefish - - - - 100.0 -
Blackbelly rosefish 2.1 3.0 3.3 46.7 5.4 39.5
Acadian redfish 7.5 - 0.1 3.1 88.2 1.1 
Scorpionfish uncl. - - - 100.0 - -
Armored searobin 1.1 - - 39.1 48.0 11.8
Spiny searobin - - - - 100.0 -
Northern searobin 14.7 - 15.2 37.3 14.2 18.6
Striped searobin 77.3 - - 21.3 1.3 0.1
Bluespotted searobin - - - - 100.0 -
Searobin uncl. - - - - 44.4 55.6
Hookear sculpin uncl. - - 54.2 - 25.3 20.5
Sea raven 73.8 1.4 - 24.0 - 0.8
Longhorn sculpin 10.5 - 2.1 77.2 5.2 5.0
Shorthorn sculpin - - - 58.4 2.9 38.7
Moustache sculpin - - 16.1 67.9 15.6 0.4
Bigeye sculpin - - 47.9 34.7 15.6 1.8
Alligatorfish - - - 3.4 96.6 -
Lumpfish - - 10.9 0.4 0.4 88.3
Atlantic seasnail - - - - 100.0 -
Striped bass 100.0 - - - - -
Black sea bass 28.5 3.8 1.9 45.6 8.9 11.3
Sand perch 100.0 - - - - -
Red grouper - 100.0 - - - -
Scamp 97.0 - - 3.0 <0.1 -
Bigeye - - 21.2 - 15.4 63.4
Tilefish <0.1 - 0.2 4.4 17.5 77.9
Bluefish 58.8 40.0 0.4 0.4 0.2 0.2
Cobia 29.5 12.9 - 54.3 - 3.3
Atlantic bumper - - - - - 100.0
Round scad - - - - - 100.0
Bigeye scad 13.6 - - 10.6 4.1 71.7
Greater amberjack 100.0 - - - - -
Banded rudderfish 97.0 - - 3.0 - -
Rough scad - - - - 38.0 62.0
Vermilion snapper 0.5 81.7 - <0.1 0.1 17.7
Tomtate 0.4 - 5.6 1.0 5.6 87.4
White grunt 13.1 - 18.9 13.2 4.3 50.5
Pigfish - - 61.2 5.8 0.7 32.3
Whitebone porgy 100.0 - - - - -
Spottail pinfish 0.2 - - 4.6 5.2 90.0
Pinfish 1.7 - - - - 98.3
Longspine porgy 2.9 0.8 11.3 21.6 7.2 56.2
Scup 23.5 11.8 21.0 7.3 13.1 23.3
Silver perch - - - - 100.0 -
Weakfish 76.0 7.8 1.0 10.4 4.5 0.3
Banded drum - - - 19.9 80.1 -
Spot 2.9 - 53.9 2.6 11.3 29.3
Southern kingfish 15.9 - 10.3 48.2 15.3 10.3
Northern kingfish 9.4 - 3.8 82.7 2.1 2.0 
Atlantic croaker 12.5 2.0 37.4 10.3 13.4 24.4
Atlantic spadefish - - - - - 100.0
Hogfish - - - 0.9 29.7 69.4
Tautog - - - 100.0 - -
Cunner 1.8 - 0.8 72.0 2.9 22.5
Ocean pout <0.1 - 2.1 5.4 19.3 73.2
Atlantic soft pout - - - - 100.0 -
Radiated shanny - - 2.3 - 5.4 92.3
Wrymouth - - - 100.0 - -
Atlantic wolffish - - 0.1 13.0 1.6 85.3
Southern stargazer 100.0 - - - - -
Northern sand lance 0.8 - <0.1 - 74.8 24.4
Atlantic cutlassfish 69.2 - - 21.9 8.1 0.8
Little tunny 99.3 - - - 0.6 0.1
Atlantic bonito 80.7 19.3 - - - -
Chub mackerel 0.8 - - - 12.6 86.6
Atlantic mackerel 0.1 0.2 <0.1 0.7 89.5 9.5
King mackerel 99.9 0.1 - - - -
Spanish mackerel 82.5 16.5 - 0.4 - 0.6
Swordfish 32.5 67.4 - - - 0.1
Harvestfish - - - - - 100.0
Butterfish 0.1 - 2.3 0.1 1.7 95.8
Gulf Stream flounder 4.6 - 47.2 7.2 34.1 6.9
Summer flounder 61.1 34.2 - 1.8 2.6 0.3
Fourspot flounder 11.8 54.3 2.0 27.3 2.5 2.1
Windowpane 31.4 - 0.9 14.3 51.6 1.8
Dusky flounder 8.7 - - 25.5 65.8 -
Witch flounder - - 85.7 - 3.4 10.9
American plaice - - 2.2 4.0 1.2 92.6
Atlantic halibut 65.7 18.5 - 15.4 <0.1 0.4
Winter flounder 3.5 - 35.6 0.8 7.1 53.0
Yellowtail flounder 0.7 - 38.5 6.4 42.5 11.9
Planehead filefish - 5.8 66.7 - - 27.5

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 (Modified Jun. 13 2008)