• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Evolutionary Applications >Recurrent evolution of life history ecotypes in sockeye salmon: implications for conservation and future evolution
【2h】

Recurrent evolution of life history ecotypes in sockeye salmon: implications for conservation and future evolution

机译：红鲑生活史生态型的周期性演变：对保护和未来进化的意义

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We examine the evolutionary history and speculate about the evolutionary future of three basic life history ecotypes that contribute to the biocomplexity of sockeye salmon (Oncorhynchus nerka). The ‘recurrent evolution’ (RE) hypothesis claims that the sea/river ecotype is ancestral, a ‘straying’ form with poorly differentiated (meta)population structure, and that highly structured populations of lake-type sockeye and kokanee have evolved repeatedly in parallel adaptive radiations between recurrent glaciations of the Pleistocene Epoch. Basic premises of this hypothesis are consistent with new, independent evidence from recent surveys of genetic variation in mitochondrial and microsatellite DNA: (1) sockeye salmon are most closely related to pink (O. gorbuscha) and chum (O. keta) salmon with sea-type life histories; (2) the sockeye life history ecotypes exist as polyphyletic lineages within large drainages and geographic regions; (3) the sea/river ecotype exhibits less genetic differentiation among populations than the lake or kokanee ecotypes both within and among drainages; and (4) genetic diversity is typically higher in the sea/river ecotype than in the lake and kokanee ecotypes. Anthropogenic modification of estuarine habitat and intensive coastal fisheries have likely reduced and fragmented historic metapopulations of the sea/river ecotype, particularly in southern areas. In contrast, the kokanee ecotype appears to be favoured by marine fisheries and predicted changes in climate.
机译：我们检查了进化史，并推测了三种基本的生命史生态型的进化未来，这些生态型对红鲑鱼（Oncorhynchus nerka）的生物复杂性做出了贡献。 “经常演化”（RE）假说声称，海/河生态型是祖先的，是一种“散乱”的形式，具有低分化的（元）种群结构，并且高度结构化的湖泊型红大眼和科卡尼种群平行地反复进化。更新世时期冰川之间的适应性辐射。该假说的基本前提与最近对线粒体和微卫星DNA遗传变异的调查得出的新的独立证据相一致：（1）红鲑鱼与粉红色（O. gorbuscha）和chum（O. keta）鲑与海的关系最密切型生活史； （2）红大腿生活史生态型以大流域和地理区域内的多系谱系存在； （3）在流域内和流域之间，海河生态型在种群之间的遗传分化程度低于湖泊或科卡尼生态型； （4）海洋/河流生态型的遗传多样性通常高于湖泊和科卡尼生态型。人为改变河口栖息地和集约化沿海渔业可能会减少和分散海洋/河流生态型的历史性历史种群，尤其是在南部地区。相反，kokanee生态型似乎受到海洋渔业的青睐，并预测了气候的变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号