weight of stomach contents x 10* as a percentage 

 of wet weight offish). Empty stomachs were in- 

 cluded in seasonal measurements of feeding in- 

 tensity. Statistical tests were from Sokal and 

 Rohlf(1969). 



Results and Discussion 



Gammarus spp. were the most important prey 

 during all seasons (Table 2). Secondary prey in- 

 cluded copepods (winter), the oppossum shrimp, 

 Neomysis americana (spring and fall) 

 Monoculodes sp. (Amphipoda) (spring), Cyathura 

 polita (Isopoda) (spring and fall), and sand 

 shrimp, Crangon septemspinosa (fall). Gam- 

 marus spp., N. americana, and Monoculodes sp. 



are numerically important tychoplankters in this 

 area of the Hudson River (Ginn 1977; Lauer et 

 al.'*). Abundant infaunal species in the 

 Haverstraw Bay area include the polychaete 

 Scolecolepides viridis the amphipod Lep- 

 tocheirus plumulosus, and Cyathura polita (Ris- 

 tich et al. 1977). Tychoplankton appears to be 

 more important as prey of Hudson River tomcod 

 than infauna. In other estuaries, however, in- 

 fauna may be more important; e.g., Alexander 

 (1971) found that polychaetes, even though 



<Lauer, G. J., W. T. Waller, D. W. Bath, W. Meeks. R. Heffner, 

 T. Ginn, L. Zubarik, P. Bibko, and P. C. Storm. 1974. Entrain- 

 ment studies on Hudson River organisms. In L. D. Jensen 

 (editor), Entrainment and intake screening. Proceedings on the 

 second entrainment and intake screening workshop, p. 37-82. 

 Johns Hopkins Univ. Edison Electric Inst. Rep. 15. 



Table 2. — Seasonal prey of age 1 and 2 Atlantic tomcod from Haverstraw Bay. Hudson River, 1973-76. 



'Number of occurrences/total number ot fish 



^Number of prey item a'/lotal number of prey 



^Geometric mean of (percent occurrence  percent composition) 



1004 



