Moult-breeding overlap in relation to environmental conditions of the pied flycatcher within a climate change context
Reproduction and moult are two fundamental events in the life of birds, and both are characterized for being energetically expensive. The overlap of both processes can lead to a reduction in the reproductive success and/or survival of the bird. Furthermore, this trade-off between reproduction and mo...
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| Formato: | tesis de maestría |
| Fecha de publicación: | 2024 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:dnet:digitalcsic_::fe8297c39077a1abe016f94a80ba9a02 |
| Acesso em linha: | http://hdl.handle.net/10261/426328 |
| Access Level: | acceso abierto |
| Palavra-chave: | Moult-breeding overlap Pied flycatcher (Ficedula hypoleuca) Climate change Physiological trade-off Intrinsic and extrinsic factors Fitness Environmental conditions |
| Resumo: | Reproduction and moult are two fundamental events in the life of birds, and both are characterized for being energetically expensive. The overlap of both processes can lead to a reduction in the reproductive success and/or survival of the bird. Furthermore, this trade-off between reproduction and moulting is of vital importance in long-distance migratory birds due to the limited time they have to carry out both processes before returning to their winter quarters, specially under a framework of global warming. In this work, we investigate the influence of different intrinsic factors (sex, age, laying date) and extrinsic factors (temperature and habitat) on the occurrence of moult-breeding overlap and moult onset using 19 years of data from a long-term monitoring population of pied flycatchers. Our results show that the occurrence of moult-breeding overlap has not increased during the study period, and neither has advanced the onset of moult. We found that both moult-breeding overlap and onset of moult were sex and age-dependent: males showed greater overlap and earlier moult onset than females, and first-year birds tend to overlap moult and breeding more than older birds. However, temperature during incubation did not show any association with neither the occurrence of moult-breeding overlap nor the onset of moult. Our findings suggest that sexual differences in the moult-breeding overlap may indicate differential fitness costs for males and females and that moult may be more sensitive to endogenous conditions. |
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