...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Adaptive phenotypic plasticity of eel diadromy
【24h】

Adaptive phenotypic plasticity of eel diadromy

机译：鳗鱼适应性的表型可塑性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Eels are marine teleosts that have ancestrally evolved a continental growth phase during which diadromy is facultative. This migratory plasticity reflects a fitness trade-off between search for the most productive habitats and competition avoidance favoring shift to less productive areas, while migration costs (increased mortality and reduced growth) hinder movements. To cope with these conflicting selective pressures acting in heterogeneous and unpredictable environments, eels have evolved a conditional evolutionarily stable strategy (ESS) with alternative tactics as a regulation mechanism for migratory plasticity. In this model, diadromy is considered as a threshold reaction norm to an individual's energetic status. In the population, this reaction norm evolves rapidly in response to changes in the cost/benefit fitness ratio of diadromy. This conditional ESS model may explain how the collapse of freshwater eel stocks results not only from decreased recruitment but also from an adaptive drop in the proportion of the diadromous phenotype in populations. Hence, I suggest that the decline in populations of eels has been less steep in salt than in freshwater habitats.
机译：鳗鱼是海洋硬骨鱼类，从祖先演化为大陆生长期，在此期间透性是兼性的。这种迁徙可塑性反映了在寻找生产力最高的栖息地与避免竞争之间的权衡取舍，而竞争避免则倾向于转移到生产力较低的地区，而迁徙成本（死亡率增加和生长减少）阻碍了迁徙。为了应对在异质且不可预测的环境中发生的这些相互矛盾的选择压力，鳗鱼已经进化出条件进化稳定策略（ESS），并采用替代策略作为迁移可塑性的调控机制。在此模型中，透湿被视为对个体精力充沛状态的阈值反应标准。在人群中，该反应规范随着对避孕药成本/收益适合度的变化而迅速发展。这种有条件的ESS模型可以解释淡水鳗鱼种群的崩溃不仅是由于招聘减少，而且是由于种群中过缺表型比例的适应性下降造成的。因此，我建议鳗鱼种群的下降幅度不如淡水栖息地大。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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