Johnson Laura N L, McLeod Brenna A, Burns Lynne E, Arseneault Krista, Frasier Timothy R, Broders Hugh G
Biology Department, Saint Mary's University, Halifax, Nova Scotia, Canada.
Biology Department, Saint Mary's University, Halifax, Nova Scotia, Canada; Nova Scotia Museum of Natural History, Halifax, Nova Scotia, Canada.
PLoS One. 2015 May 5;10(5):e0126309. doi: 10.1371/journal.pone.0126309. eCollection 2015.
During late summer and early autumn, temperate bats migrate from their summering sites to swarming sites, where mating likely occurs. However, the extent to which individuals of a single summering site migrate to the same swarming site, and vice versa, is not known. We examined the migratory connectivity between summering and swarming sites in two temperate, North American, bat species, the little brown bat (Myotis lucifugus) and the northern long-eared bat (Myotis septentrionalis). Using mitochondrial and microsatellite DNA markers, we examined population structuring within and among summering and swarming sites. Both species exhibited moderate degrees of mitochondrial DNA differentiation (little brown bat: FST(SUMMER) = 0.093, FST(SWARMING) = 0.052; northern long-eared bat: FST(SUMMER) = 0.117, FST(SWARMING) = 0.043) and little microsatellite DNA differentiation among summering and among swarming sites[corrected]. Haplotype diversity was significantly higher at swarming sites than summering sites, supporting the idea that swarming sites are comprised of individuals from various summering sites. Further, pairwise analyses suggest that swarming sites are not necessarily comprised of only individuals from the most proximal summering colonies.
在夏末和初秋，温带地区的蝙蝠会从它们的夏季栖息地迁徙到集群地点，交配可能在此发生。然而，来自同一夏季栖息地的个体迁徙到同一个集群地点的程度，以及反之亦然的情况，目前尚不清楚。我们研究了北美两种温带蝙蝠——小棕蝠（Myotis lucifugus）和北长耳蝠（Myotis septentrionalis）的夏季栖息地与集群地点之间的迁徙连通性。我们使用线粒体和微卫星DNA标记，研究了夏季栖息地内部和之间以及集群地点内部和之间的种群结构。这两个物种都表现出中等程度的线粒体DNA分化（小棕蝠：FST（夏季）= 0.093，FST（集群）= 0.052；北长耳蝠：FST（夏季）= 0.117，FST（集群）= 0.043），并且在夏季栖息地之间和集群地点之间微卫星DNA分化较小[校正后]。集群地点的单倍型多样性显著高于夏季栖息地，这支持了集群地点由来自不同夏季栖息地的个体组成的观点。此外，成对分析表明，集群地点不一定只由来自最近的夏季栖息地群体的个体组成。
