Raja erinacea 





FALL 1976 











90- 

 80- 



A 



IRI 



A 6791 

 B 5918 

 C 963 





70- 







K 60 " 





D 



274 





CD 50- 



3 40- 

 Z 

 „ 30- 





E 

 F 

 G 



79 

 78 



51 





° 20- 





B 



C 





10- 





D E F c, 



10- 









5j£w 



- 20- 



77% 



55% 



3 30- 



O 



> 40- 



c> 50- 











60- 



87% 





WINTER 1977 

 A 



93% 



IR I 



AMPHIPODA 



DECAPODA 



POLYCHAETA 



PELECYPODA 



PISCES 



CUMACEA 



ISOPODA 



9799 



2864 



51 4 



229 



17 



567 



23 



42% | 6% 

 21% 



\ 55% 16% 



51% 



SPRING 1977 



SUMMER 1977 



I Rl 



90- 





A 



8908 









80- 



A 



Q 



3201 

 600 









70- 





C 









60- 





D 



367 









50- 





E 



F 



<l 

 1055 









40- 





G 



68 









30- 















20- 





B 



C 



n 



F 





10- 





G 













71% 

 o 



2 5% 



10- 



62% 





28°/ 





20- 



94% 





30- 















40- 















30- 



















50% 











70- 















80- 

 90- 















92% 



I R I 



A 



7671 



B 



6268 



C 



225 



D 



2 



E 



228 



F 



874 



G 



3 



41% 



/23% 



63% 6% 



3% 



74% 

 % FREQUENCY 



Figure 2. — Percent frequency occurrence, percent number, percent volume 

 displacement, and index of relative importance (IRI) of higher taxonomic 

 groups of food in the diet of Raja erinacea, by seasonal cruise. 



11 



