714 



Fishery Bulletin 98(4) 



\Nunivak) 



Alaska 



1997 



Pribilof Islands 



CPUE (no/ha) 



. 0.01-10 



• 10.1-25 



• 25.1-75 



• 75.1 - 102 



V 



1998 



Pribilof Islands 



(^ :A.i 



Figure 2 



Trawling stations (coded by density [CPUE=number fish per hectare] for 1997 and 1998), where 

 Gymnocanthus pistilligcr were collected during the Alaska Fisheries Science Center Eastern 

 Bering Sea Groundfish Survey. 



the entire survey area was 110.24 million fish and the bio- 

 mass estimate was 4254 metric tons (t). The 1998 CPUE 

 ranged from 0.1 to 55 with a mean of 7.37 (SD=5.23); the 

 population estimate was 51.70 million fish and the bio- 

 mass estimate was 1956 t. 



The distribution of females and males differed by depth 

 (Fig. 3) with the proportion of females decreasing with 



depth. Catch rates at depth indicated that G. pistilligcr 

 inhabited nearshore areas and were most abundant in the 

 shallowest depths covered by this survey (Fig. 4). 



Trawling in Kuskokwim Bay and Togiak Bays resulted 

 in mean CPUEs of 6 and 24 for each bay, respectively (»=9 

 trawls per bay, CPUEs of 1 to 17, SD=5.54 for Kuskokwim 

 Bay: CPUEs of 1 to 79, SD=30.32 for Togiak Bay). During 



