Stopover ecology of autumn migrating Bluethroats Luscinia s. svecica in relation to age and sex
Stopover ecology of autumn migrating Bluethroats Luscinia s. svecica in relation to age and sex
复制标题
秋季迁徙蓝喉鹬Luscinia s的中途停留生态。
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
H. Ellegren
中科院分区：
文献类型：
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作者：
H. Ellegren
秋移蓝腹脂鲤的生态学研究。在瑞典东部的一个中途停留地点，对不同年龄和性别的svecica进行了调查，并使用数据来测试最佳鸟类迁移模型的预测。成虫和幼鱼同时迁移，但成虫的迁移时间较集中。成年人携带更多的脂肪，停留的时间比青少年短。与青少年相比，成年人在到达后并没有失去质量，并且比青少年更早开始积累脂肪。因此，成年鸟类可以被视为更有效的“迁徙者”，这种情况与最近的数据相一致，这些数据表明成年蓝鳃金龟的迁徙速度比幼年蓝鳃金龟快。在幼鱼中，雌性（比雄性小）平均比雄性早三天到达。如果女性比男性拥有更低的资源潜力，时间差异可能是由于女性为了避免竞争而分配的迁移时间。然而，没有发现性别之间的脂肪沉积模式或停留时间的差异。中途停留的数据至少部分支持最佳鸟类迁徙的时间最小化模型。
The ecology of autumn migrating Bluethroats Luscinia s. svecica of different age and sex classes was investigated at a stopover site in eastern Sweden, and data were used to test predictions from a model for optimal bird migration. Adults and juveniles migrated simultaneously but the migration period of adults was more concentrated. Adults carried more fat and stopped over for a shorter time than juveniles. In contrast to juveniles, adults did not lose mass after arrival and started accumulating fat earlier than juveniles. Adult birds can thus be regarded as more efficient "migrators", a situation consistent with recent data showing that adult Bluethroats migrate at a higher speed than juveniles. Among juveniles, females (being smaller than males) arrived on average three days before males. If females have lower resourceholding potentials than males, the time difference could be due to an allocation of the migration time by females in order to avoid competition. However, no differences in fat deposition patterns or stopover times were found between sexes. The stopover data at least partly support the time-minimization model for optimal bird migration.