Table I 



-Stomach tontenis of eight northwest Atlantic pleuronectiform fishes collected during the spring and autumn hiittom trawl suiTey cruises, 1969-72. 

 Data are expressed as a percentage of the total weight of prey in the stomachs. ( + indicates present but <0. !%■) 



Gulf Stream 

 flounder 



Summer 

 flounder 



Fourspot 

 flounder 



Windowpane 

 flounder 



Wiich 

 flounder 



American 

 plaice 



Yellowiail 

 flounder 



Winter 

 flounder 



CNIDARIA 



Hydrozoa 



Anihozoa 



Other Cnidaria 

 ANNELIDA 



Nephthyidae 



Maldanidae 



Lumbreneridae 



Ampharetidae 



Terebellidae 



Sabellidae 



Other Annelida 

 ARTHROPODA 



Cumacea 



Amphipoda 



Mysidacea 



Euphausiacea 



Pandalidae 



Crangonidae 



Axiidae 



Paguridae 



Majidae 



Cancridae 



Other Decapoda 



Other Arthropoda 

 MOLLUSCA 



Gastropoda 



Bivalvia 



Cephalopoda 



Other Mollusca 

 ECHINODERMATA 



Holothuroidea 



Echinoidea 



Ophiuroidea 



Other Echinodermata 

 PISCES 



Gadidae 



Cottidae 



Bothidae 



Other Pisces 

 Other groups 

 Animal remains 

 Sand and rock 



0.1 



51.2 



+ 

 0.1 



24.9 

 3.6 

 3.6 

 0.8 

 1.5 

 2.7 



14.1 



42.2 



2.1 

 24.2 

 0.8 

 4.4 

 2.0 

 2.4 

 + 

 + 

 + 

 1.6 

 0.4 

 4.3 



0.9 



0.6 

 0.2 

 0.1 



1.4 



1.4 



2.7 



2.6 



0.1 



1.1 

 0.3 

 0.1 



1.2 



0.1 



1.1 



51.0 



51.0 



47.8 



26.1 



21.7 



0.3 



40.7 



19.4 



28.5 



22.6 



1.6 



4.3 



0.5 

 10.4 

 0.2 



6.4 



0.2 

 0.3 

 5.9 



1.2 

 3.0 

 0.2 



1.7 



0.2 



0.6 



1.0 



0.1 



0.6 



0.9 



1.4 

 5.4 

 0.3 



0.7 

 2.8 

 1.8 



2.9 



0.8 



0.5 



0.3 



3.9 

 5.9 

 2.6 



26.3 



0.1 



0.1 



3.8 

 16.1 

 5.0 



Windowpane, Scophthabnus aquosus. — Three hundred and 

 eighty-five of the 716 windowpane stomachs examined contained 

 prey, and almost 90% of the diet was arthropods (Table 1). Three 

 arthropod groups accounted for over 80"% of the diet, and within 

 these groups only a few species were important. For example, virtu- 

 ally all the Mysidacea (41.8%) were identified as Neomysis 

 americana (41.0"%). The family Pandalidae (22.4%) was similar in 

 that Dichelopandalus leptocerus accounted for 20.4% of this 

 group, and in the fcunily Crangonidae, Crangon septemspinosa 

 (18.4%) was the only representative. The only other arthropod 

 group contributing >1% to the diet was the Amphipoda (2.1%), 

 with Leptocheirus pinguis (lAVo) and Gammarus annulatus (O.l^is) 

 being the most important animals. Pisces was of secondary impor- 



tance in the diet; however, a variety of fish species were identified in 

 the stomach contents. American sand lance, Ammodytes 

 americanus, both adults (1.6%) and larvae (1.8%), were preyed 

 upon. The blackbelly rosefish, Helicolenus dactylopterus (0.4%); 

 windowpane (0.3%); silverside, Menidia (0.3%); and longhom 

 sculpin, Myoxocephalus octodecispinosus (0.2%), were all foimd in 

 windowpane stomachs. The only other animals of any significance 

 in the diet were squid, Loligo (1.1%), and the sand dollar, 

 Echinarachniits parma (1.2%). 



Witch flounder, Glyptocephalus cynoglossus. — Annelids 

 accounted for almost three-fourths (72.8%) of the diet of witch 



