| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1111/eva.12123 |
| Evolution of age and length at maturation of Alaskan salmon under size-selective harvest. | |
| Kendall NW; Dieckmann U; Heino M; Punt AE; Quinn TP | |
| 发表日期 | 2014 |
| 出处 | Evolutionary Applications 7 (2): 313-322 |
| 出版年 | 2014 |
| 语种 | 英语 |
| 摘要 | Spatial and temporal trends and variation in life-history traits, including age and length at maturation, can be influenced by environmental and anthropogenic processes, including size-selective exploitation. Spawning adults in many wild Alaskan sockeye salmon populations have become shorter at a given age over the past half-century, but their age composition has not changed. These fish have been exploited by a gillnet fishery since the late 1800s that has tended to remove the larger fish. Using a rare, long-term dataset, we estimated probabilistic maturation reaction norms (PMRNs) for males and females in nine populations in two basins and correlated these changes with fishery size selection and intensity to determine whether such selection contributed to microevolutionary changes in maturation length. PMRN midpoints decreased in six of nine populations for both sexes, consistent with the harvest. These results support the hypothesis that environmental changes in the ocean (likely from competition) combined with adaptive microevolution (decreased PMRNs) have produced the observed life-history patterns. PMRNs did not decrease in all populations, and we documented differences in magnitude and consistency of size selection and exploitation rates among populations. Incorporating evolutionary considerations and tracking further changes in life-history traits can support continued sustainable exploitation and productivity in these and other exploited natural resources. |
| 主题 | Evolution and Ecology (EEP) |
| 关键词 | Fishery selection Harvest-induced evolution Oncorhynchus nerka Phenotypic plasticity Probabilistic maturation reaction norms |
| URL | http://pure.iiasa.ac.at/id/eprint/10998/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/129916 |
| 推荐引用方式 GB/T 7714 | Kendall NW,Dieckmann U,Heino M,et al. Evolution of age and length at maturation of Alaskan salmon under size-selective harvest.. 2014. |
| 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 | ||
| Kendall_et_al-2014-E（208KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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