Bering Sea do constitute a single population, but 

 no such determinations have been made for rock 

 sole and Alaska plaice. Second, there is no evidence 

 of validity for the ages we obtained from otoliths; 

 that is to say that we do not know how well the 

 otolith ages represent the true age of the fish. 

 Additionally, we must assume that otoliths were 

 interpreted and recorded in essentially the same 

 manner by all investigators. 



Acknowledgments 



We thank Hency Sakuda, now with the Hawaii 

 Department of Fisheries, for assistance in sample 

 collection and Beverly Vinter of the Northwest 

 Fisheries Center, National Marine Fisheries Ser- 

 vice, NOAA, for reading of otoliths. 



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Douglas D. Weber 

 Herbert H.Shippen 



Northwest Fisheries Center 



National Marine Fisheries Service, NOAA 



2725 Montlake Boulevard East 



Seattle. WA 98112 



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