...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of ornithology >Flexible foraging for finding fish: variable diving patterns in Magellanic penguins Spheniscus magellanicus from different colonies
【24h】

Flexible foraging for finding fish: variable diving patterns in Magellanic penguins Spheniscus magellanicus from different colonies

机译：灵活的觅食觅食方式：来自不同殖民地的麦哲伦企鹅企鹅Spheniscus magellanicus

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

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

摘要

Seabirds have to deal with environmental variability and are predicted to modulate foraging behavior to maximize fitness, with particularly strong selection pressure for optimal behavior during chick provisioning when energy demands are high. We reported data from 42 breeding birds equipped during the early chick-rearing period with depth recorders at four different colonies [Punta Norte (42A degrees S), Bahia Bustamante (45A degrees S), Puerto Deseado (47A degrees S) and Puerto San Julian (49A degrees S)] in patagonian Argentina. Although Magellanic penguins are purported to show little flexibility in foraging behavior, we discovered marked inter-colony differences in diving behavior. Even though the southern marine ecosystems, in general, and the area exploited by Magellanic penguins from the studied colonies, in particular, are usually characterized by their stability, we cannot entirely exclude that interannual differences may have also affected our results. The colonies located in the center of the breeding distribution, Bahia Bustamante and Puerto Deseado, showed the greatest diving and foraging effort with Bahia Bustamante penguins having the deepest and longest dives of all birds and requiring the longest post-dive recovery durations at the surface. Puerto Deseado had the birds with the highest values of diving effort parameters. Penguins from both colonies also had the highest descent and ascent rates during dives. We assume that the clear variation in diving behavior reflects the response of the birds to the varying prey types and availability around the different colonies, but note that, despite this, some colonies fare markedly better than others in breeding.C1 Sala, Juan E.; Ctr Nacl Patagon CENPAT CONICET, Puerto Madryn, Chubut, ArgentinaSC Behavioral Sciences; Environmental Sciences & Ecology; Marine & Freshwater Biology
机译：海鸟必须应对环境的变化，并被预测通过调节觅食行为来最大程度地提高适应性，特别是在能量需求很高的情况下，特别强的选择压力以在雏鸡供应期间实现最佳行为。我们报告了来自42个种鸡的数据，这些鸡在早期雏鸡饲养期间在四个不同的殖民地配备了深度记录仪[北蓬塔（42A度），巴伊亚布斯塔曼特（45A度），波多黎各Deseado（47A度）和圣朱利安港（49A度）]在巴塔哥尼亚阿根廷。尽管麦哲伦企鹅据称在觅食行为上表现出很小的灵活性，但我们发现潜水行为的明显殖民地差异。尽管一般来说，南部海洋生态系统，特别是麦哲伦企鹅从研究的殖民地开发的区域，通常通常以其稳定性为特征，但我们不能完全排除年际差异也可能影响我们的结果。位于繁殖分布中心的殖民地巴伊亚（Bahia Bustamante）和波多黎各（Puerto Deseado）表现出最大的潜水和觅食努力，巴伊亚（Bahia Bustamante）企鹅在所有鸟类中拥有最深和最长的潜水时间，并且需要最长的潜水后恢复时间。迪塞阿多港的鸟类的潜水努力参数最高。在潜水期间，来自两个殖民地的企鹅的下降率和上升率也最高。我们假设潜水行为的明显变化反映了鸟类对不同殖民地周围不同的猎物类型和可利用性的反应，但请注意，尽管如此，一些殖民地在繁殖方面的表现明显优于其他鸟类.C1 Sala，Juan E. ; Ctr Nacl Patagon CENPAT CONICET，马德林港，丘布特，阿根廷行为科学;环境科学与生态;海洋与淡水生物学

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