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首页> 外文期刊>ICES Journal of Marine Science >Otolith increment width-based chronologies disclose temperature and density-dependent effects on demersal fish growth
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Otolith increment width-based chronologies disclose temperature and density-dependent effects on demersal fish growth

机译：基于耳石增加宽度的年代，揭示了温度和密度对水下鱼类生长的影响

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摘要

Climate change and fishing are drastically impacting marine ecosystems. Comprehending the biological consequences of these effects on commercially exploited fish is especially challenging. Here, we developed a 43-year otolith increment width-based growth chronology for one of the most important commercially exploited fish species in the Northeast Atlantic (European hake, Merluccius merluccius). Increasingly complex linear mixed-effects models were used to partition growth variation into intrinsic (age, sex, and age-at-capture) and extrinsic (environmental and biotic variables) factors, allowing age interaction with extrinsic variables to assess age-dependent responses in growth. Our results provided strong evidence that European hake growth is impacted by ocean temperature, namely sea surface temperature and temperature at depth, and species abundance (recruitment), with different responses depending on fish age. We found evidence that increasing ocean temperature could be highly detrimental for species growth especially during the first years of life. We provided insights into the effects of environmental and biotic factors on species growth variation. Such information is key to recognize the sensitivity of European hake growth to climate change, which may contribute to sustainable management policies for this valuable resource.
机译：气候变化和捕鱼正严重影响海洋生态系统。理解这些影响对商业开发鱼类的生物学后果尤其具有挑战性。在这里，我们为东北大西洋最重要的商业开发鱼类之一（欧洲无尾鳕，墨鲁奇鱼）开发了一种基于耳石增量宽度基于43年的生长年表。越来越复杂的线性混合效应模型用于将生长变异划分为内在（年龄，性别和被捕年龄）和外在（环境和生物变量）因素，从而允许年龄与外在变量相互作用，以评估年龄相关反应。增长。我们的结果提供了有力的证据，表明欧洲无须鳕的生长受到海洋温度（即海面温度和深海温度以及物种丰富度（补充））的影响，并且根据鱼类的年龄会有不同的反应。我们发现有证据表明，升高的海洋温度可能会对物种的生长造成极大的损害，尤其是在生命的最初几年。我们提供了有关环境和生物因素对物种生长变异的影响的见解。此类信息对于认识欧洲无须鳕生长对气候变化的敏感性至关重要，这可能有助于对这一宝贵资源的可持续管理政策。

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