Effect of zooplankton on fish larval abundance and distribution: a long-term study on North Sea herring (Clupea harengus)

Effect of zooplankton on fish larval abundance and distribution: a long-term study on North Sea herring (Clupea harengus)
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浮游动物对鱼类幼体丰度和分布的影响:对北海鲱鱼(Clupea harengus)的长期研究

DOI:
10.1093/icesjms/fsv140
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发表时间:
2015
影响因子:
3.3
通讯作者:
Alvarez-Fernandez S
Alvarez-Fernandez S
中科院分区:
农林科学2区
文献类型:
--
作者:
Alvarez-Fernandez S

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在过去的十年中,北海秋季产卵鲱鱼(鲱鱼)经历了连续几年的低招聘,尽管高产卵种群生物量。虽然几种机制,如减少幼虫生长和早期幼虫死亡率高,已被确定为共同发生在这些年来,其背后的原因尚未确定。在这项研究中,我们分析了一个长期的数据集的幼虫分布,在国际底拖网调查,在冬季和浮游动物丰度,从连续浮游生物记录仪获得的环境条件。这些分析评估了这些因素对幼虫期存活率降低的潜在影响。30年数据的广义加性混合模型显示Pseudocalanussp.在冬季,有很强的关系,幼虫的分布和丰富,这表明捕食者-猎物的过程是背后的低招聘,在最近几年。根据我们的模型,温度对幼虫丰度的直接影响小于浮游动物丰度的影响。
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 ofPseudocalanussp. 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.
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