期刊
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
卷 286, 期 1894, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rspb.2018.1916
关键词
carry-over effects; life history; migration; Tachycineta bicolor; timing of breeding; tree swallow
资金
- Leaders Opportunity Fund Grants from the Canadian Foundation for Innovation
- Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grants
- NSERC Research Tools and Instruments Grant
- NSERC Postdoctoral Research Fellowship
- NSERC Industrial Research and Development Fellowship
- NSERC Alexander Graham Bell Canada Graduate Scholarship
- NSERC Canada Research Chairs Program
- University of Guelph
- Environment and Climate Change Canada
- Bird Studies Canada
- University of Northern British Columbia
- British Columbia Knowledge Development Fund
- Skaggs Foundation
- National Science Foundation [DEB-0933602, IOS-0745156, IDBR 1152356, DEB 0946685, IDBR 1152131]
- Fonds de Recherche du Quebec-Nature et Technologies
- James S. McDonnell Foundation
- Alberta Conservation Association
- TD Friends of the Environment
- Shell Environmental Fund
- Nature Canada's Charles Labatiuk Nature Endowment Fund
Latitudinal differences in timing of breeding are well documented but how such differences carry over to influence timing of events in the annual cycle of migratory birds is notwell understood. We examined geographical variation in timing of events throughout the year using light-level geolocator tracking data from 133 migratory tree swallows (Tachycineta bicolor) originating from 12 North American breeding populations. A swallow's breeding latitude influenced timing of breeding, which then carried over to affect breeding ground departure. This resulted in subsequent effects on the arrival and departure schedules at autumn stopover locations and timing of arrival at non-breeding locations. This 'domino effect' between timing events was no longer apparent by the time individuals departed for spring migration. Our range-wide analysis demonstrates the lasting impact breeding latitude can have on migration schedules but also highlights how such timing relationships can reset when individuals reside at non-breeding sites for extended periods of time.
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