• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Avian research >Springtime migratory restlessness and departure orientation of Great Knots (Calidris tenuirostris) in the south compared to the north Yellow Sea
【24h】

Springtime migratory restlessness and departure orientation of Great Knots (Calidris tenuirostris) in the south compared to the north Yellow Sea

机译：与北黄海相比，南部大结节（Calidris tenuirostris）的春季迁徙不安和离开方向

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

摘要

BackgroundThe motivation of birds to proceed with migration is associated with both endogenous and exogenous factors. According to their migratory situation and to the characteristics of stopover sites, birds might exhibit migratory motivation differently among sites. Although migratory motivation of migrating birds has been well studied in many species, the investigation of the same species in different migratory situations and at different stopover sites is still limited. We predicted that birds at different stopover sites could differ in migratory disposition, including expression of migratory restlessness and responses to environmental cues. MethodsHere we compared migration motivation and orientation of Great Knots ( Calidris tenuirostris ) at two stopover sites, Chongming Dongtan in the south Yellow Sea, which is a temporary rest site, and Yalujiang Estuary Wetland in the north Yellow Sea, which is a critical refuelling site, during northward migration. Modified Emlen funnels, with thermal paper inside to record scratches of the birds, were used to detect activity (intensity and direction) of birds. Environmental conditions, including wind direction and speed, cloud cover, tide condition, times of the day (before and after sunset) were recorded during experiments. Generalized linear models were used to detect the effects of endogenous and exogenous factors on the migratory motivation of the birds. ResultsIn the south Yellow Sea, the migratory activity intensity of Great Knots was positively related to wind assistance. In the north Yellow Sea, where birds exhibited higher intensity of migratory activity than in the south, the intensity increased and the motivation to initiate migration grew stronger as the season advanced. The Great Knots exhibited wind-related orientation behaviour in the funnels at both sites. ConclusionsThe results suggest that the intensity of migratory motivation differed between the two sites. Departure decisions of Great Knots appear to be affected mainly by external factors at the temporary rest site in the south Yellow Sea but possibly by endogenous factors at the final pre-breeding refuelling site in the north Yellow Sea.
机译：背景鸟类进行迁徙的动机与内源性因素和外源性因素都有关。根据鸟类的迁徙情况和中途停留地点的特征，鸟类在各个地点之间表现出不同的迁徙动机。尽管在许多物种中都对迁徙鸟类的迁徙动机进行了很好的研究，但在不同迁徙情况和不同中途停留地点对同一物种的调查仍然有限。我们预测，在不同中途停留地点的鸟类可能会有不同的迁徙倾向，包括迁徙躁动和对环境暗示的反应。方法在这里，我们比较了两个中途停留点，即南黄海的崇明东滩（一个临时休息点）和北黄海的鸭绿江河口湿地（一个重要的加油站）两个中转站的大结（Calidris tenuirostris）的迁移动机和方向。 ，在向北迁移期间。改良的Emlen漏斗内部装有热敏纸以记录禽类的划痕，用于检测禽类的活动（强度和方向）。实验期间记录了环境条件，包括风向和风速，云量，潮汐条件，一天中的时间（日落前后）。使用广义线性模型来检测内源性和外源性因素对鸟类迁徙动机的影响。结果在南黄海，大结的迁徙活动强度与风力辅助呈正相关。在黄海北部，与南部相比，鸟类的迁徙活动强度更高，随着季节的发展，强度增加，引发迁徙的动机也增强。大结在两个站点的漏斗中都显示出与风有关的定向行为。结论结果表明，两个地方的迁徙动机强度不同。大结的起飞决定似乎主要受到南黄海临时休养地的外部因素的影响，但可能受北黄海最后育种前加油地点的内在因素的影响。

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