| 来源类型 | Monograph (IIASA Interim Report)
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| 规范类型 | 报告
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| Climate Change and Condition of Herring (Clupea Harengus) Explain Long-Term Trends in Extent of Skipped Reproduction. |
| Engelhard GH; Heino M
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| 发表日期 | 2006
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| 出版者 | IIASA, Laxenburg, Austria: IR-06-008
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| 出版年 | 2006
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| 语种 | 英语
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| 摘要 | It is commonly assumed that iteroparous fish, once mature, normally reproduce in all consecutive seasons. Recent work suggested, however, that in Norwegian spring-spawning herring - a population that undertakes extensive spawning migrations - almost one in two adults may skip their second spawning migration. Why should herring not return to spawn the year after first spawning, but instead wait an extra year? This paper describes long-term changes in the extent to which the second reproductive season is skipped in this herring population. These are shown to be linked to the size and condition of herring as first-time spawners, and to climatic factors possibly related to food availability. The findings corroborate the hypothesis that skipped reproduction results from trade-offs between current and future reproduction, growth and survival. For herring, participation in distant, energetically costly, and risky spawning migrations will only pay off in terms of fitness if individuals are sufficiently large, and in sufficient condition, to both successfully migrate and spawn. |
| 主题 | Evolution and Ecology (EEP)
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| URL | http://pure.iiasa.ac.at/id/eprint/8086/
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| 来源智库 | International Institute for Applied Systems Analysis (Austria)
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| 资源类型 | 智库出版物
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| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/125545
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推荐引用方式
GB/T 7714 |
Engelhard GH,Heino M. Climate Change and Condition of Herring (Clupea Harengus) Explain Long-Term Trends in Extent of Skipped Reproduction.. 2006.
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文件名：
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IR-06-008.pdf
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格式：
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Adobe PDF
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