期刊
CANADIAN JOURNAL OF ZOOLOGY
卷 97, 期 11, 页码 979-987出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/cjz-2019-0001
关键词
Barn Swallow; breeding; food supply; Hirundo rustica; prey availability; reproduction
类别
资金
- Species at Risk Research Fund of Ontario (Ontario Ministry of Natural Resources and Forestry)
- Toronto Entomologists' Association
- Toronto Zoo's Endangered Species Reserve Fund
- Trent University
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Toronto Zoo
Animal populations are often limited by food availability, particularly during the breeding season. In birds, food limitation can impact several components of the reproductive cycle, including the timing of reproduction and reproductive output. Barn Swallows (Hirundo rustica Linnaeus, 1758) have experienced a population decline over the past 40 years in North America that is thought to be related to changes in prey availability. We monitored Barn Swallow reproductive behaviour and prey availability throughout two breeding seasons at 10 sites in Ontario, Canada, to test the hypothesis that limited prey availability during the breeding season affected reproductive behaviour. We found no relationship between food availability and number of eggs laid or number of young fledged. Neither did we observe higher rates of second brooding or more pairs nesting at breeding sites with higher food availability. Barn Swallows did not time their reproductive effort to maximize prey availability during the nesting period, but any mismatch in phenology of prey and bird reproduction at a breeding site was not associated with lower reproductive success. The results of this study did not support our hypothesis and suggest that Barn Swallow reproductive behaviour was not negatively affected by limited prey availability on the breeding grounds.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据