Page iii 



Contents 



Abstract v 



Taxonomic Index of Fish and Squid Species Sampled, Including for Each Species the Number of Stomachs Examined, 



Percentage of Stomachs Found Empty, and Associated Appendix Table Number vii 



Alphabetic Index of Fish and Squid Species Sampled, Including for Each Species the Geographic Areas Where 



Collected, Types of Data Listed, and Associated Appendix Table Number xi 



Introduction 1 



Methods and Materials 1 



Results and Observations 2 



Acknowledgments 5 



References Cited 6 



Tables 



Table 1 . Percentage of total stomach contents by weight of six functional prey groups for 1 70 species offish 



and squid collected in the Northwest Atlantic 7 



Table 2. Percentage by weight offish component of diet of piscivores according to geographic area of collection 11 



Table 3. Percentage by weight of squid component of diet of predators which eat squid according to geographic 



area of collection 12 



Table 4. Percentage by weight of polychaete component of diet of predators which eat polychaetes according to 



geographic area of collection 13 



Table 5. Percentage by weight of decapod crustacean component of diet of predators which eat decapods according 



to geographic area of collection 14 



Table 6. Percentage by weight of crustaceans (other than decapods) in diet of predators which eat such crustaceans 



according to geographic area of collection 15 



Table 7. Percentage by weight of all other prey (than those noted in Tables 2-6) in diet of predators according to 



geographic area of collection 16 



Figure 



Figure 1 . Delineation of the six principal offshore geographic areas, and the two inshore areas referred to as inshore 



north of Cape Hatteras and inshore south of Cape Hatteras, surveyed by the NEFSC during 1977-80 iv 



Appendices 



Appendix A. Overall prey of 1 1 predators which were lightly sampled and/or not well represented in collections 



during the NEFSC's 1 977-80 bottom trawl surveys 17 



Appendix B. Overall prey of 60 predators which were fully sampled and well represented in collections during the 



NEFSC's 1977-80 bottom trawl surveys 33 



