'/o OF VOLUME 



% OF OCCURRENCE 



30 40 50 



PERCENT 



Figure 7. — Percent of stomach content volume and percent of occurrence in stomachs of the principal food species found 



in 1963. 



of fur seals in the Bering Sea. In stomachs 

 from seals collected in the Bering Sea and 

 Unimak Pass area in I960 (Niggol, Fiscus, 

 O'Brien, and Wilke)', Theragra composed 65.7 

 percent of the total volume. The areas of 

 occurrence are shown in appendix figure 2. 



Sebastodes sp. (rockfish) 



Sebastodes sp. were found in one stomach 

 collected near Akutan Pass in lat. 54°08' N., 

 long. 166°2I' W. (appendix fig. 5). 



Pleurogrammus monopterygius (Atka mack- 

 erel) 



Pleurogrammus were found in 1 3 stomachs 

 and represented 2,7 percent of total volume 

 of food. They ranked sixth in importance as a 

 food species. The area of occurrence is 

 shown in appendix figure 2. 



preopercular spine of one cottid was 



•Karl Niggol, Clifford H. Fiscus, Jr., Thomas P. 

 O'Brien, and Ford Willce. 1960. Pelagic fur seal inves- 

 tigations, Alaska, 1960. Bureau of Commercial Fisheries, 

 Marine Mammal Biological Laboratory, Seattle, Wash. 

 (Manuscript report.) 



The 

 found. 

 Cyclopteridae 



Traces of Cyclopteridae were identified 

 from two fur seal stomachs. One seal was 

 collected 55 miles northwest of Cape Cheerful, 

 Unalaska Island; the other, 76 miles south- 

 west of St. George Island. Both were collected 

 in deep water of sectors 1 and 2. Cyclopterids 

 have been reported previously as occurring 

 in fur seal stomachs from the Gulf of Alaska 

 (Niggol, Fiscus, O'Brien, and Wilke'). 



Trichodontidae 



Two trichodontids were identified from fur 

 seals killed near the Pribilof Islands (appen- 

 dix fig. 4). One was identified as Trichodon 

 trichodon . Sandfish have been reported pre- 

 viously by Kenyon (1956) in stomachs from 

 St. Paul Island, andby Niggol, Fiscus, O'Brien, 

 and Wilke " . 



9 See footnote 8. 

 " See footnote 8. 



