...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Scientific reports. >Extreme variation in migration strategies between and within wandering albatross populations during their sabbatical year, and their fitness consequences
【24h】

Extreme variation in migration strategies between and within wandering albatross populations during their sabbatical year, and their fitness consequences

机译：信奉休假年的信天翁种群之间和之内的迁徙策略极端不同，其适应性后果

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Migratory behavior, routes and zones used during the non-breeding season are assumed to have been selected to maximize fitness, and can lead to genetic differentiation. Yet, here we show that migration strategies differ markedly between and within two genetically similar populations of wandering albatross Diomedea exulans from the Crozet and Kerguelen archipelagos in the Indian Ocean. Wandering albatrosses usually breed biennially if successful, and during the sabbatical year, all birds from Kerguelen migrate to the Pacific Ocean, whereas most from Crozet are sedentary. Instead of taking the shortest routes, which would involve a return against headwinds, migratory birds fly with the westerly winds, requiring detours of 10,000?s km. In total, migrants circumnavigate Antarctica 2 to 3 times, covering more than 120,000?km in a single sabbatical year. Our results indicate strong links between migratory behavior and fitness; all birds from Kerguelen breed biennially, whereas a significant proportion of those from Crozet, especially females, are sedentary and breed in consecutive calendar years. To breed annually, these females temporarily change mate, but return to their original partner in the following year. This extreme variation in migratory behavior has important consequences in term of life history evolution and susceptibility to climate change and fisheries.
机译：假定已选择非繁殖季节使用的迁徙行为，路线和区域，以使其适应性最大化，并可能导致遗传分化。然而，我们在这里表明，在印度洋的Crozet和Kerguelen archipelagos的两个信实信天翁Diomedea exulans的两个遗传相似的种群之间和之内，迁移策略存在明显差异。如果成功的话，信天翁通常每两年繁殖一次，并且在休假的一年里，所有来自科格伦的鸟类都迁往太平洋，而大多数来自克罗泽特的鸟类都是定居的。候鸟不会走最短的路线，而是要逆风而行，而是要以西风飞行，绕道行驶10,000公里。总体而言，移民绕南极航行2到3次，仅在休假的一年中就覆盖了12万多公里。我们的结果表明，迁徙行为与适应之间有密切的联系。来自克格伦（Kerguelen）的所有鸟类每两年繁殖一次，而克罗兹（Crozet）的那些鸟类，尤其是雌性鸟类，有很大一部分是定居的，并且在连续日历年内繁殖。为了每年繁殖，这些雌性暂时改变配偶，但在第二年返回其原始伴侣。迁徙行为的这种极端变化对生活史的演变以及对气候变化和渔业的敏感性具有重要的意义。

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