| 来源类型 | Monograph (IIASA Interim Report)
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| 规范类型 | 报告
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| Disparate Maturation Adaptations to Size-dependent Mortality. |
| Gardmark A; Dieckmann U
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| 发表日期 | 2006
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| 出版者 | IIASA, Laxenburg, Austria: IR-06-039
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| 出版年 | 2006
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| 语种 | 英语
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| 摘要 | Body size is an important determinant of resource use, fecundity, and mortality risk. Evolution of maturation size in response to size-dependent selection is thus a fundamental part of life-history theory. Increased mortality among small individuals has previously been predicted to cause larger maturation size, whereas increased mortality among large individuals is expected to have the opposite effect. Here we use a continuously size-structured model to demonstrate that, contrary to these widespread expectations, increased mortality among small individuals can have three alternative effects: maturation size may increase, decrease, or become evolutionarily bistable. We show that such complex responses must be reckoned with whenever mortality is size-dependent, growth is indeterminate, reproduction impairs growth, and fecundity increases with size. Predicting adaptive responses to altered size-dependent mortality is thus inherently difficult, since, as demonstrated here, such mortality can not only reverse the direction of adaptation, but also cause abrupt shifts in evolutionarily stable maturation sizes. |
| 主题 | Evolution and Ecology (EEP)
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| URL | http://pure.iiasa.ac.at/id/eprint/8058/
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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/125517
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推荐引用方式
GB/T 7714 |
Gardmark A,Dieckmann U. Disparate Maturation Adaptations to Size-dependent Mortality.. 2006.
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文件名：
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IR-06-039.pdf
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格式：
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Adobe PDF
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