Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15298 |
A century of fish growth in relation to climate change, population dynamics and exploitation | |
Cô; me Denechaud; Szymon Smoliń; ski; Audrey J. Geffen; Jane A. Godiksen; Steven E. Campana | |
2020-08-20 | |
发表期刊 | Global Change Biology |
出版年 | 2020 |
英文摘要 | Marine ecosystems, particularly in high‐latitude regions such as the Arctic, have been significantly affected by human activities and contributions to climate change. Evaluating how fish populations responded to past changes in their environment is helpful for evaluating their future patterns, but is often hindered by the lack of long‐term biological data available. Using otolith increments of Northeast Arctic cod (Gadus morhua) as a proxy for individual growth, we developed a century‐scale biochronology (1924–2014) based on the measurements of 3,894 fish, which revealed significant variations in cod growth over the last 91 years. We combined mixed‐effect modeling and path analysis to relate these growth variations to selected climate, population and fishing‐related factors. Cod growth was negatively related to cod population size and positively related to capelin population size, one of the most important prey items. This suggests that density‐dependent effects are the main source of growth variability due to competition for resources and cannibalism. Growth was also positively correlated with warming sea temperatures but negatively correlated with the Atlantic Multidecadal Oscillation, suggesting contrasting effects of climate warming at different spatial scales. Fishing pressure had a significant but weak negative direct impact on growth. Additionally, path analysis revealed that the selected growth factors were interrelated. Capelin biomass was positively related to sea temperature and negatively influenced by herring biomass, while cod biomass was mainly driven by fishing mortality. Together, these results give a better understanding of how multiple interacting factors have shaped cod growth throughout a century, both directly and indirectly. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/291089 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Cô,me Denechaud,Szymon Smoliń,et al. A century of fish growth in relation to climate change, population dynamics and exploitation[J]. Global Change Biology,2020. |
APA | Cô.,me Denechaud.,Szymon Smoliń.,ski.,Audrey J. Geffen.,...&Steven E. Campana.(2020).A century of fish growth in relation to climate change, population dynamics and exploitation.Global Change Biology. |
MLA | Cô,et al."A century of fish growth in relation to climate change, population dynamics and exploitation".Global Change Biology (2020). |
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