FISHERY BULLETIN: VOL. 87, NO. 4, 1989 



Table 5. — Parameters used to obtain cod population consumption esti- 

 mates for Paralithodes camtschatica and the estimated total biomass and 

 numbers consumed by the cod population. (Assuming this species of crab 

 is vulnerable to cod predation for only 30 days of the study period.) 



Table 6. — Parameters used to obtain cod population consumption estimates for 

 Chionoecetes bairdi and the estimated total biomass and numbers consumed by the 

 cod population. (Assuming this species of crab is vulnerable to cod predation during 

 the whole 1 53 days of the study period.) 



Table 7. — Parameters used to obtain cod population consumption estimates for 

 Chionoecetes opilio and the estimated total biomass and numbers consumed by the 

 cod population. (Assuming this species of crab is vulnerable to cod predation during 

 the whole 153 days of the study period.) 



Year 



Cod 

 size 

 (cm) 



Cod 

 biomass 

 (1,000 t) 



Daily 



ration 



(%BWD) 



Percent 

 crab in diet 

 (by weight) 



Total biomass 



crab consumed 



(1,000 t) 



Total number 



crab consumed 



(billions) 



818 



