Journal
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
Volume 279, Issue 1730, Pages 876-883Publisher
ROYAL SOC
DOI: 10.1098/rspb.2011.1351
Keywords
bird migration; carry-over effects; compensation; snow geese
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Funding
- Natural Science and Engineering Research Council of Canada (NSERC)
- Fonds Quebecois de Recherche sur la Nature et les Technologies (FQRNT)
- Canadian Wildlife Service
- FQRNT
- W. Garfield Weston Award for Northern Research
- Canadian Wildlife Federation
- NSERC
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Despite observational evidence of carry-over effects (COEs, events occurring in one season that produce residual effects on individuals the following seasons), to our knowledge no experimental studies have been carried out to explore how COEs might affect reproductive output. We simulated an environmental perturbation affecting spring-staging migrants to investigate COEs in greater snow geese (Anser caerulescens atlanticus). During three consecutive years, 2037 females captured during spring staging (approx. 3000 km south of their Arctic breeding grounds) were maintained in captivity (with or without access to food) for 0-4 days. Duration of captivity (but not food treatment) negatively affected reproductive success, probably through stress response. Reproductive success was reduced by 45-71% in 2 years, but not in a third year with unusually favourable breeding conditions. This unprecedented manipulation indicates that COEs can have a strong effect on individual reproductive success in long-distance migrants, but that this effect can be partly compensated for by good environmental conditions on the breeding ground.
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