• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Moult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocation
【24h】

Moult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocation

机译：从基于光的和基于同位素的地理定位中推断北海金枪鱼的蜕皮位置和饮食

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

Many pelagic seabirds moult their feathers while at sea, which is an energetically costly behaviour. Mortality rates during moult can be high, so spatial and trophic ecology during this critical period is important for understanding demographic patterns. Unfortunately, individual foraging behaviours specifically linked to at-sea moulting are commonly unclear. This paper combines 2 different approaches to geolocation: data from bird-borne geolocation loggers and stable-isotope assignment using carbon and nitrogen isotope maps (isoscapes). Coupling 2 geolocation processes allows some uncertainties associated with isotope-based assignment to be constrained. We applied this approach to quantify species-specific foraging locations and individual trophic variability during feather regrowth in 3 sympatric auk populations breeding on the Isle of May, Scotland (common guillemot Uria aalge, razorbill Alca torda and Atlantic puffin Fratercula arctica). Inferred foraging areas during moult differed between species and feather types. Guillemots likely underwent moult within the southern North Sea, razorbills along the east coast of England and into the southern North Sea and puffins off the east coast of Scotland. Estimates of individual trophic position varied considerably within feather types (up to 1 trophic level difference between individuals), among feather types grown during different time periods and across the 3 species, with guillemots consistently foraging at higher trophic positions than razorbills and puffins. Used in combination, these methods better constrain foraging areas during moulting, and provide a technique to explore individual differences and flexibility in foraging strategy, which is valuable information for both seabird conservation and marine spatial planning.
机译：许多远洋海鸟在海上换羽，这是一种耗能巨大的行为。换羽期的死亡率可能很高，因此在这个关键时期的空间和营养生态学对于理解人口统计学模式很重要。不幸的是，人们通常不清楚与蜕皮有关的个体觅食行为。本文结合了两种不同的地理定位方法：来自鸟类传播的地理定位记录仪的数据以及使用碳和氮同位素图（等值线）进行的稳定同位素分配。耦合2地理位置过程允许约束与基于同位素的分配相关的一些不确定性。我们采用了这种方法来量化在苏格兰梅岛上的3个同养的auk种群的羽毛再生长中特定物种的觅食位置和个体的营养变异性（常见的海雀科的乌拉尔aalge，razorbill Alca torda和大西洋海雀Fratercula arctica）。换羽期间推断的觅食面积在物种和羽毛类型之间有所不同。海雀科的鸟类可能在北海南部进行了换羽，在英格兰东海岸和北海南部进入了剃须刀，并在苏格兰东海岸附近进行了海鹦。在不同类型的羽毛中，在不同时间段内以及在这3个物种中生长的羽毛类型中，单个营养位置的估计在羽毛类型中存在很大差异（个体之间最多有1个营养水平差异），海胆科动物始终在比剃刀和海雀更高的营养位置上觅食。这些方法结合使用，可以更好地限制换羽期间的觅食区域，并提供一种探索觅食策略中个体差异和灵活性的技术，这对于海鸟保护和海洋空间规划都是有价值的信息。

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