| 来源类型 | Monograph (IIASA Interim Report)
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| 规范类型 | 报告
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| The Influence of Juvenile and Adult Environments on Life History Trajectories. |
| Taborsky B
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| 发表日期 | 2006
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| 出版者 | IIASA, Laxenburg, Austria: IR-06-033
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| 出版年 | 2006
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| 语种 | 英语
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| 摘要 | There is increasing evidence that the environment experienced early in life can strongly influence adult life histories. It is largely unknown, however, how past and present conditions influence suites of life-history traits regarding major life-history trade-offs. Especially in animals with indeterminate growth, we may expect that environmental conditions of juveniles and adults independently or interactively influence the life-history trade-off between growth and reproduction after maturation. Juvenile growth conditions may initiate a feedback loop determining adult allocation patterns, triggered by size-dependent mortality risk. I tested this possibility in a long-term growth experiment with mouthbrooding cichlids. Females were raised either on a high-food or low-food diet. After maturation half of them were switched to the opposite treatment, while the other half remained unchanged. Adult growth was determined by current resource availability, but key reproductive traits like reproductive rate and offspring size were only influenced by juvenile growth conditions, irrespective of the ration received as adults. Moreover, the allocation of resources to growth vs. reproduction and to offspring number vs. size were shaped by juvenile rather than adult ecology. These results indicate that early individual history must be considered when analysing causes of life-history variation in natural populations. |
| 主题 | Evolution and Ecology (EEP)
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| 关键词 | development, phenotypic plasticity, trade-off, growth, reproduction, cichlids
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| URL | http://pure.iiasa.ac.at/id/eprint/8064/
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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/125523
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推荐引用方式
GB/T 7714 |
Taborsky B. The Influence of Juvenile and Adult Environments on Life History Trajectories.. 2006.
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文件名：
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IR-06-033.pdf
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格式：
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Adobe PDF
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