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首页> 外文期刊>ICES Journal of Marine Science >The Recruitment Of Atlantic Salmon In Europe
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The Recruitment Of Atlantic Salmon In Europe

机译：欧洲大西洋鲑鱼的招募

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摘要

The stock complex of Atlantic salmon, Salmo salar, in Europe has experienced a multidecadal decline in recruitment, resulting in the lowest stock abundances observed since 1970. Here, physical forcing, biological interactions, and the resultant growth response of post-smolt salmon are examined with a view to understanding the mechanism controlling recruitment. Sea surface temperature (SST) has increased in the Northeast Atlantic, with the pattern and seasonal change in SST negatively correlated with post-smolt survival during summer and in a region that spatially matches the post-smolt nursery. Constituents of the pelagic foodweb, including potential post-smolt food and plankton that may affect post-smolt forage, have changed on a decadal scale and correlate with salmon survival. Retrospective growth analyses of eight stock/sea age components show that post-smolt growth during summer is positively correlated with salmon survival and recruitment. The Atlantic Multidecadal Oscillation appears to be a more closely aligned climate forcing index than the North Atlantic Oscillation with respect to salmon recruitment. European Atlantic salmon recruitment appears to be governed by factors that affect the growth of post-smolts during their first summer at sea, including SST and forage abundances; growth appears to mediate survival by the functional relationship between post-smolts and their predators.
机译：欧洲大西洋鲑鱼Salmo salar的种群群经历了数十年的减少，因此自1970年以来观测到的种群丰度最低。在此，研究了鲑鱼的物理强迫，生物相互作用以及由此产生的生长反应以了解控制招聘的机制。东北大西洋的海表温度（SST）升高，SST的模式和季节变化与夏季和在空间上与后熏鲑苗圃相匹配的地区的后熏鲑存活率呈负相关。浮游食物网的成分，包括可能会影响到软体动物后草料的潜在的软体动物后食物和浮游生物，已经在十年的规模上发生了变化，并且与鲑鱼的存活率相关。对八种种群/海洋年龄成分的回顾性生长分析表明，夏季的熏鲑后生长与鲑鱼的存活和补充成正相关。就鲑鱼的吸收而言，大西洋多年代际涛动似乎是比北大西洋涛动更为紧密的气候强迫指数。欧洲大西洋鲑鱼的招募似乎受影响其在海中第一个夏季后软体动物生长的因素的控制，这些因素包括SST和草料丰度。增长似乎通过后软体动物与其捕食者之间的功能关系来介导生存。

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