Age-specific social dominance affects habitat use by breeding American redstarts (Setophaga ruticilla): a removal experiment
Age-specific social dominance affects habitat use by breeding American redstarts (Setophaga ruticilla): a removal experiment
复制标题
特定年龄的社会优势通过繁殖美国红尾鸲（Setophaga ruticilla）影响栖息地的利用：一项清除实验
DOI：
--
复制
发表时间：
1989
影响因子：
2.3
通讯作者：
R. Holmes
中科院分区：
文献类型：
--
作者：
T. Sherry;R. Holmes
通过将年长的雄性逐出它们的繁殖区域，我们通过繁殖美国红蜘蛛Setophaga ruticilla(Aves：Parulinae)来检验与年龄相关的优势行为影响栖息地选择模式的假设。在三个繁殖季节的五个实验重复中，15只年长的红蜘蛛被10岁的幼崽取代，5只年长的雄性红蜘蛛被取代；在同一时间段，这两个年龄段的红蜘蛛雄性都没有出现在控制点，尽管两只一岁的幼崽消失了。在腾退地区定居的一岁雄性(67%，n=9)明显多于红星种群(26.8%，n=209)。我们拒绝了另一种假设，即一岁的雄性红蜘蛛由于年龄相关的(天生)栖息地偏好而占据了与老年雄性不同的栖息地。红蜘蛛是一群在行为上不同的动物，它们殖民了因我们的迁徙而空置的领土(即“飞蚊”)。一岁龄和年长雄性飞蚊的存在表明，适宜的栖息地对该物种来说是有限的，种内竞争相互作用在栖息地分布和潜在的种群调节中是重要的。
SummaryBy removing older males from their breeding territories, we tested the hypothesis that age-related dominance behavior influenced the pattern of habitat selection by breeding American redstarts Setophaga ruticilla (Aves: Parulinae). Fifteen older male redstarts removed in five experimental replicates during three breeding seasons were replaced by ten yearling and five older males; no redstart males of either age colonized the control sites during the same time periods, although two yearlings disappeared. Significantly more yearling males (67%, n=9) colonized the vacated areas than were present in the redstart population at large (26.8%, n=209). We reject the alternative hypothesis that yearling male redstarts occupy different habitats from older males because of age-related (innate) habitat preferences. Redstarts that colonized the territories made vacant by our removals (i.e., “floaters”) were a behaviorally heterogeneous group of animals. The presence of both yearling and older male floaters indicates that suitable habitat is limiting for this species and that intraspecific competitive interactions are important in habitat distribution, and potentially in population regulation.