...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Canadian Journal of Fisheries and Aquatic Sciences >Fish ladder installation across a historical barrier asymmetrically increased conspecific introgressive hybridization between wild winter and summer run steelhead salmon in the Siletz River, Oregon
【24h】

Fish ladder installation across a historical barrier asymmetrically increased conspecific introgressive hybridization between wild winter and summer run steelhead salmon in the Siletz River, Oregon

机译：鱼梯安装在历史屏障中，野生冬季和夏季跑步之间的野生冬季和夏季跑步之间的缺乏杂交杂交。俄勒冈州硅灰岩河

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

Managing intraspecific hybridization is crucial for maintaining a balance between inbreeding and outbreeding depression in winter and summer run steelhead (Oncorhynchus mykiss). While spatial distance is a common factor in maintaining reproductive isolation between these two ecotypes, physical barriers may also prevent hybridization, particularly in short river systems. To determine the effect of barriers and their removal on hybridization, we studied winter and summer steelhead populations in the Siletz River of northern coastal Oregon, which were historically separated by a physical barrier that was removed in the 1950s. We observed a large degree of admixture in the summer run population but little in the summer hatchery or wild winter populations, the former of which was established shortly after the removal of the barrier. This suggests that the high level of admixture in the wild summer run may be due to the removal of the barrier. We also found reduced genetic diversity in the wild summer run and in both hatchery populations. This highlights the need to balance inbreeding and outbreeding depression in hybridizing subpopulations.
机译：管理内部杂交至关重要，在冬季和夏季运行Steelhead（Oncorhynchus Mykiss）中保持近亲繁殖和繁殖抑郁症之间的平衡至关重要。虽然空间距离是在这两个生态型之间保持生殖隔离的常见因素，但物理屏障也可能防止杂交，特别是在短河系中。为了确定障碍的效果及其在杂交中的去除，我们研究了冬天沿海俄勒冈州硅灰岩河的冬季和夏季钢头群，历史地被20世纪50年代拆除的物理屏障分开。我们在夏季人口中观察到了大量的混合物，但夏季孵化场或野生冬季人口中很少，前者在撤离屏障后不久就成立。这表明野生夏季运行中的高水平混合物可能是由于屏障的去除。我们还发现野生夏季和孵化场群体中的遗传多样性降低。这突出了在杂交群体中平衡近亲繁殖和繁殖抑郁症的需要。

著录项

相似文献

  • 外文文献
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