Can experience alter the avian annual cycle? Results of migration experiments with indigo buntings
Can experience alter the avian annual cycle? Results of migration experiments with indigo buntings
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经验可以改变鸟类的年度周期吗？
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
V. Nolan
中科院分区：
文献类型：
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作者：
P. Sniegowski;E. Ketterson;V. Nolan
在2年的测试是否过早释放他们熟悉的，常年繁殖的领土进行了现场实验会导致靛蓝彩旗（Passerzna cyanea）删除春季迁移从他们的年度周期。在第一年，男性彩旗在夏季在其繁殖区被抓获，并在室内举行了冬季的光照制度，他们会遇到的性质作为秋季移民和冬季居民。第二年春天，它们被释放的时候，彩旗开始春季迁移从亚热带地区。其中一半被释放到他们的繁殖区，他们通常会返回;一半被释放到遥远的南方。一些被释放到其领土上的雄性留下来，并进入繁殖状态，而没有迁移，而一些被释放到南方的雄性则返回北方的领土。结果表明，内源性或光周期机制控制的时间和发生的迁移，在这个物种可以被推翻的经验。在第二年，我们测试了这些结果的其他解释。我们第二年的结果似乎表明：（1）在第一年取消迁徙的鸟类并不是因为不利的天气而这样做的;（2）在第一年返回繁殖地的鸟类实际上是在迁徙，而不仅仅是追溯它们向外的旅程。
Field experiments were conducted during 2 years testing whether premature release on their familiar, perennial breeding territories would cause indigo buntings (Passerzna cyanea) to delete spring migration from their annual cycle. In the first year, male buntings were captured on their breeding territories in summer and held indoors for the winter on the photoregime that they would have encountered in nature as fall migrants and winter residents. The following spring they were released at the time buntings begin spring migration from the subtropics. Half were released on their breeding territories, to which they would normally have returned; half were released far to the south. Some of the males released on their territories remained and passed into breeding condition without having migrated, while some of those released to the south returned north to their territories. The results suggest that endogenous or photoperiodic mechanisms controlling the timing and occurrence of migration in this species can be overridden by experience. In the second year we tested alternative explanations for these results. Our second year’s results seem to indicate (1) that birds that deleted migration in year one did not do so because of unfavourable weather and (2) that the birds that returned to their breeding sites in year one were actually migrating and not simply retracing their outward journey.