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首页> 外文期刊>ICES Journal of Marine Science >Differential north-south response of juvenile Chinook salmon (Oncorhynchus tshawytscha) marine growth to ecosystem change in the eastern Bering Sea, 1974-2010
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Differential north-south response of juvenile Chinook salmon (Oncorhynchus tshawytscha) marine growth to ecosystem change in the eastern Bering Sea, 1974-2010

机译：1974-2010年白令海东部少年契努克鲑鱼（Oncorhynchus tshawytscha）海洋生长对生态系统变化的南北响应差异

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摘要

Chinook salmon (Oncorhynchus tshawytscha, Salmonidae) returns to western Alaska were historically high and variable but recently reached record lows. Understanding the differential influence of climatic and oceanic conditions on the growth of juvenile Chinook salmon in the north and south eastern Bering Sea is key to understanding mechanisms and factors affecting the production dynamics of Chinook salmon from western Alaska and the Arctic. Summer growth was lower and more variable among years for Chinook salmon in the south than the north eastern Bering Sea. Summer growth decreased with a rise in sea temperatures in the north and south and increased with more sea ice coverage and a later time of ice retreat in the south but not in the north. Capelin (Mallotus villosus), an important prey for juvenile Chinook salmon in the north and during cold years may link increased growth to cooler sea temperatures. Reduced and more variable summer growth of juvenile Chinook salmon from the eastern Bering Sea with warming may have implications on overwintering survival.
机译：奇努克鲑鱼（Oncorhynchus tshawytscha，Salmonidae）返回阿拉斯加西部的历史高位和多变，但最近达到了历史最低点。了解气候和海洋条件对白令海北部和东南部的奇努克鲑鱼幼鱼生长的不同影响，是了解影响阿拉斯加西部和北极奇努克鲑鱼生产动态的机制和因素的关键。与南部的白令海相比，南部的奇努克鲑鱼的夏季生长速度较低，并且各年间变化较大。夏季的增长随着北部和南部海温的升高而降低，并随着海冰覆盖率的增加和南部（而非北部）冰层撤回时间的增加而增加。毛鳞鱼（Mallotus villosus）是北部和春季寒冷时的奇努克鲑鱼的重要猎物，可能将生长的增加与凉爽的海水温度联系起来。来自白令海东部的奇努克鲑鱼的夏季生长减少且变化较大，且变暖可能对越冬存活率有影响。

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