366 



Fishery Bulletin 93(2), 1995 



TL =187.06 + 2-94 x HL (r = 0.972, n.139) 



A 





»: ~ 







V?' 



180 220 260 



Head length (mm) 



01 



c 800 



a 



- 700 



TL =264 46 + 7 24 x ML (r = 959, n = 112) 



B 



•V-". 



•• v •••• 



4 



?:: 



60 70 90 110 



Maxillary length (mm! 



Figure 6 



Size of partially consumed Greenland turbot, Reinhardtius 

 hippoglossoides . (A) The relationship between head length (HL) 

 and total length (TL); (B) the relationship between maxillary 

 length (ML) and total length (TL). 



but the rate of yearly loss per station (per operation) 

 is relatively large in product per station. 



Discussion 



Although killer whales range throughout Alaskan 

 waters (Braham and Dahlheim, 1982), fishery inter- 

 actions are restricted to the Bering Sea and Prince 

 William Sound (Dahlheim 2 ). In the Bering Sea, two 

 areas, B-I and B-II, were repeatedly noted for pre- 

 dation by killer whales on longline-caught fish. De- 

 spite considerable fishing effort in areas outside the 

 Bering Sea, killer-whale-longline interactions have 

 not been reported for most of the western Aleutian 

 Island chain, Alaska Peninsula, Gulf of Alaska, or 

 Southeast Alaska. However, in September 1991 in 

 Glacier Bay National Park, fishermen reported that 

 a small number of halibut showed evidence of tooth 

 rake marks made by killer whales and consequently 



were unmarketable fish (Matkin 15 ). In Canadian 

 waters, 85% of the commercial harvest of sablefish 

 is taken by pot gear. There have been no reports of 

 killer whales interfering with this pot fishery. There 

 are, however, two isolated accounts of killer whales 

 raiding Pacific halibut longline operations in Hecate 

 Strait, British Columbia (Ellis 16 ). Sablefish longlining 

 operations also range from Washington State to cen- 

 tral California. Records of killer whale interference 

 with this fishery have not been found (Parks 17 ). 



The only other area within Alaska where killer 

 whales have been reported raiding longline gear is 

 Prince William Sound. Interactions in this area are 

 well documented (Dahlheim 2 ; Matkin 3 ). At least 19 



15 Matkin, D. R. Box Gustavus, AK. Pers. commun., October 1991. 



16 Ellis, G. Box 215, Station A, Nanaimo, B.C., Canada V9R 5K9. 

 Pers. commun., March 1990. 



17 Parks, N. Alaska Fisheries Science Center, 7600 Sand Point 

 Way N.E., Seattle, WA 98115. Pers. commun., May 1990. 



