| 来源类型 | Monograph (IIASA Interim Report) |
| 规范类型 | 报告 |
| Adaptive Changes in Harvested Populations: Plasticity and Evolution of Age and Size at Maturation. | |
| Ernande B; Dieckmann U; Heino M | |
| 发表日期 | 2003 |
| 出版者 | IIASA, Laxenburg, Austria: IR-03-058 |
| 出版年 | 2003 |
| 语种 | 英语 |
| 摘要 | We investigate harvest-induced adaptive changes in age and size at maturation by modeling both plastic variation and evolutionary trajectories. Harvesting mature individuals displaces the reaction norm for age and size at maturation toward older ages and larger sizes and rotates it clockwise, whereas harvesting immature individuals has the reverse qualitative effect. If both immature and mature individuals are harvested, the net effect has generally the same trend as when harvesting immature individuals only. This stems from the sensitivity of the evolutionary response that depends on the maturity state of harvested individuals, but also on the type of harvest mortality (negatively or positively density-dependent, density-independent) and the value of three life history parameters (natural mortality, growth rate, and the trade-off between growth and reproduction). Evolutionary changes in the maturation reaction norm have strong repercussions for the mean size and the density of the harvested individuals that, in most cases, result in the reduction of biomass - a response that population dynamical models would overlook. These results highlight the importance of accounting for evolutionary trends in the long-term management of exploited living resources and give qualitative insights as how to minimize detrimental consequences of harvest-induced evolutionary changes in maturation reaction norms. |
| 主题 | Adaptive Dynamics Network (ADN) |
| 关键词 | Age and size at maturation Evolution Exploited populations Harvesting Phenotypic plasticity |
| URL | http://pure.iiasa.ac.at/id/eprint/7026/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/125228 |
| 推荐引用方式 GB/T 7714 | Ernande B,Dieckmann U,Heino M. Adaptive Changes in Harvested Populations: Plasticity and Evolution of Age and Size at Maturation.. 2003. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| IR-03-058.pdf（244KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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