REXSTAD and PIKITCH: FOOD CONSUMPTION OF PACIFIC HAKE 



CD 

 O 



c 



05 



O 

 Q. 



E 



"cd 

 DC 



X 



CD 



~o 



c 



S> 



Prey Consumption by Time of Day 







A Thysanoessaspinifera 



B Euphausia pacifica 



C Pandalus Jordan i 



D Sergestessp. 



E Pasiphaea pacifica 



F C rang on sp. 



G Callianassasp. 



H Engraulis mordax 



I Clupeaharengus 



J Thaleichthys pacificus 



K Osmeridae 



L Gadidae 



M Pleuronectidae 



800-1200 

 1200-1600 

 1600-2000 



jj_* 



t^TU i-l- Ixl - fca 



A B C D E F G 



— . n S. 



1 



Prey Category 



Prey Consumption by Size Class of Predator 



A Thysanoessaspinifera 



B Euphausia pacifica 



C Pandalus jordani 



D Sergestessp. 



E Pasiphaea pacifica 



F Crangonsp. 



G Callianassasp. 



H Engraulis mordax 



I Clupeaharengus 



J Thaleichthys pacificus 



K Osmeridae 



L Gacf/c/ae 



M Pleuronectidae 



35-39cm 

 40 -44cm 

 45 -49cm 

 50 -54cm 

 55 + cm 



jfl *_[]_ 



 I - ji 



K L M 



JI 



A B 



D E F G H I 



Prey Category 



K L M 



Figure 2.— Index of relative importance for major prey categories by a) time of collection and b) size of Pacific hake. Square 



root transformation used for scaling purposes. 



951 



