Studies on Neotropical Fauna and Environment ( IF 0.9 ) Pub Date : 2020-10-06 , DOI: 10.1080/01650521.2020.1829888 Mauro G. Rozas Sia 1 , Exequiel Gonzalez 1 , Luciano N. Segura 1
ABSTRACT
Philopatric birds have a number of advantages when breeding in familiar habitats, such as learning the locations of food, efficient movement throughout the breeding area, or effective escape from predators. However, few investigators have examined the possible effect of site familiarity on reproductive success, even less for Neotropical songbirds. We studied a breeding population of Masked Gnatcatchers (Polioptila dumicola) and Vermilion Flycatchers (Pyrocephalus rubinus), two south temperate songbirds, and examined the possible reproductive benefits of natal philopatry. In our population, 13.9% and 6.9% of breeding adults, respectively, for Masked Gnatcatchers and Vermilion Flycatchers, were philopatric. We found no difference in the breeding success between philopatric and non-philopatric individuals. Our results showed higher levels of philopatry for both species than previously reported for other songbirds. Because the remnants of native forests in our study area were located within a matrix of highly disturbed habitats, these intermediate-to-high values of natal philopatry could be linked to the structural characteristics of the forest that may force birds to use the few suitable forest patches available in the area.
中文翻译:
在阿根廷中东部的原生森林中繁殖的喜土和非喜土鸣禽的繁殖成功率高,繁殖成功率无差异
摘要
在熟悉的栖息地繁殖时,栖息地鸟类具有许多优势,例如了解食物的位置、在整个繁殖区内高效移动或有效逃离捕食者。然而,很少有研究人员研究过地点熟悉度对繁殖成功的可能影响,对新热带鸣禽的研究就更少了。我们研究了 Masked Gnatcatchers ( Polioptila dumicola ) 和 Vermilion Flycatchers ( Pyrocephalus rubinus ) 的繁殖种群), 两只南温带鸣禽,并检查了母婴传养可能带来的生殖益处。在我们的种群中,分别有 13.9% 和 6.9% 的成年蒙面蚋捕蝇器和朱红捕蝇器是亲牧的。我们发现亲属和非亲属个体在繁殖成功方面没有差异。我们的结果显示,这两个物种的 philopatry 水平高于之前报道的其他鸣禽。由于我们研究区域的原始森林遗迹位于高度受干扰的栖息地矩阵中,因此这些中等到高的出生亲缘关系值可能与森林的结构特征有关,这可能迫使鸟类使用少数合适的森林该地区可用的补丁程序。