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首页> 外文期刊>ICES Journal of Marine Science >Effect of zooplankton on fish larval abundance and distribution: a long-term study on North Sea herring (Clupea harengus)
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Effect of zooplankton on fish larval abundance and distribution: a long-term study on North Sea herring (Clupea harengus)

机译：浮游动物对鱼幼体丰度和分布的影响：北海鲱的长期研究（Clupea harengus）

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摘要

During the last decade, North Sea autumn spawning herring (Clupea harengus) has gone through consecutive years of low recruitment despite high spawning-stock biomass. Although several mechanisms, such as reduced larval growth and high early larvae mortality, have been identified as co-occurring during these years, the causes behind them have not been identified. In this study, we analyse a long-term dataset of larval distribution, obtained during the International Bottom Trawl Survey, in relation to environmental conditions during winter and zooplankton abundances, obtained from the continuous plankton recorder. These analyses assessed the potential influence of these factors on the reduced survival of larval stages. Generalized additive mixed models on 30 years of data showed the abundance of Pseudocalanus sp. during winter to have a strong relationship with larval distribution and abundance, suggesting that predator-prey processes are behind the low recruitment in recent years. According to our models, the direct effect of temperature on larval abundances was less than the effect of zooplankton abundances.
机译：在过去十年中，尽管产卵生物量较高，但北海秋季产卵鲱鱼（Clupea harengus）却连续数年处于低招聘状态。尽管在这些年中已发现多种机制（如幼虫生长减少和早期幼虫死亡率高）同时发生，但其背后的原因尚未查明。在这项研究中，我们分析了从国际海底拖网调查期间获得的长期幼虫分布数据集，该数据集与冬季和浮游生物丰度的连续冬季浮游生物记录仪有关的环境条件有关。这些分析评估了这些因素对降低幼虫存活率的潜在影响。基于30年数据的广义加性混合模型显示了Pseudocalanus sp。的丰富性。在冬季，它与幼虫的分布和丰富度有很强的关系，这表明近年来捕食者-猎物的过程是低招聘的背后。根据我们的模型，温度对幼虫丰富度的直接影响小于浮游动物丰富度的影响。

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