. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . YELLOWFIN SOLE auG-OCT 1975 CATCH IN kg/km | + NO CATCH 250 â Figure 34-11. Distribution and relative abundance of yellowfin sole in June 1976 and August-October 1975 as shown by NWAFC trawl surveys (after Bakkala and Smith 1978). As mentioned in the text, concentrations of yellowfin sole can be noted in Bristol Bay in June 1976 and on the inner shelf off Nunivak Island and in the southeastern Bering Sea in August-Septem- ber 1975. 180° 17e°W I76*W 174-W 172-W 170°W I68'W I66*W 164°W
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . YELLOWFIN SOLE auG-OCT 1975 CATCH IN kg/km | + NO CATCH 250 â Figure 34-11. Distribution and relative abundance of yellowfin sole in June 1976 and August-October 1975 as shown by NWAFC trawl surveys (after Bakkala and Smith 1978). As mentioned in the text, concentrations of yellowfin sole can be noted in Bristol Bay in June 1976 and on the inner shelf off Nunivak Island and in the southeastern Bering Sea in August-Septem- ber 1975. 180° 17e°W I76*W 174-W 172-W 170°W I68'W I66*W 164°W 162-W 160-W 158-W water to intrude onto the continental shelf in summer to replace residual cold water (0 C or less). One multiyear temperature cycle in the eastern Bering Sea ended in 1976. Maeda (1977) has shown that temperatures increased from 1961 to 1967 and then decreased from 1968 to 1976. The 1971-76 period has been recognized as a particularly cold period in the eastern Bering Sea (McLain and Favorite 1976, Bakkala and Smith 1978). In 1977 and 1978, temperatures were again warmer than in the pre- ceding six years. Research vessel surveys to assess the condition of crab and groundfish resources in the eastern Bering Sea have been carried out by the NWAFC annually since 1971; a more comprehensive series of data is available from 1973. The 1973-78 series provides information on the distribution and abundance of yellowfin sole during the last four years of the cold phase of the recent climatic cycle and the initial two years (1977-78) of a warmer phase. Age data col- lected during the surveys also provides information on the strength of year-classes originating as far back
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