Table 2. — The importance of the snow crab, Chionoecetes bairdi, in the summer diet of Pacific cod. 

 Analysis based on specimens from pots. Crab incidence is given for total number of cod examined; 

 incidence as a percent of feeding cod given in parentheses. 



Table 3. — Frequency and percent frequency of occurrence of food items in stomachs ofGadus mac- 

 rocephalus collected July 1975 and 1976 by otter trawl near Kodiak Island, Alaska. N = number of 

 stomachs examined. Subtotals in parentheses. 



Table 4. — Comparison of percent frequency of occurrence of 

 summer food groups in male and female Gadua macrocephalus 

 caught by pots and trawls in the Kodiak Island area. 



other studies on Gadiformes (e.g., Romans and 

 Vladykov 1954; Wigley 1956; Powles 1958; Wigley 

 and Theroux 1965). 



A significant difference ( x~, a = 0.05) was found 

 for occurrence of food groups between years for 

 each size group (Figure 2). The only similarity was 

 among 33-52 cm fish between 1973 and 1975 and 

 among 73-92 cm fish between 1974 and 1975. 

 Some trends in frequency of food groups by cod size 

 were apparent (Figure 2). Fishes and cephalopods 

 increased in frequency with increasing cod size 

 over all years while amphipods and polychaete 

 worms decreased. Daan (1973) investigated the 

 relative size of food items (crustaceans and fishes) 

 used by the Atlantic cod, G. morhua, and found 



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