Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/176490
Title: Sex-specific costs of reproduction on survival in a long-lived seabird
Author: Cruz-Flores, Marta
Pradel, Roger
Bried, Joël
González-Solís, Jacob
Ramos i Garcia, Raül
Keywords: Reproducció
Ocells marins
Reproduction
Sea birds
Issue Date: 24-Mar-2021
Publisher: The Royal Society
Abstract: Costs of reproduction on survival have captured the attention of researchers since life history theory was formulated. Adults of long-lived species may increase survival by reducing their breeding effort or even skipping reproduction. In this study, we aimed to evaluate the costs of current reproduction on survival and whether skipping reproduction increases adult survival in a long-lived seabird. We used capture-mark-recapture data (1450 encounters) from two populations of Bulwer's petrel (Bulweria bulwerii), breeding in the Azores and Canary Islands, North Atlantic Ocean. Using a multi-event model with two different breeding statuses (breeders versus non-breeders), we calculated probabilities of survival and of transitions between breeding statuses, evaluating potential differences between sexes. Females had lower survival probabilities than males, independent of their breeding status. When considering breeding status, breeding females had lower survival probabilities than non-breeding females, suggesting costs of reproduction on survival. Breeding males had higher survival probabilities than non-breeding males, suggesting that males do not incur costs of reproduction on survival and that only the highest quality males have access to breeding. The highest and the lowest probabilities of skipping reproduction were found in breeding males from the Azores and in breeding males from the Canary Islands, respectively. Intermediate values were observed in the females from both populations. This result is probably due to differences in the external factors affecting both populations, essentially predation pressure and competition. The existence of sex-specific costs of reproduction on survival in several populations of this long-lived species may have important implications for species population dynamics.
Note: Versió postprint del document publicat a: https://doi.org/10.1098/rsbl.2020.0804
It is part of: Biology Letters, 2021, vol. 17, num. 3, p. 20200804
URI: http://hdl.handle.net/2445/176490
Related resource: https://doi.org/10.1098/rsbl.2020.0804
ISSN: 1744-9561
Appears in Collections:Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)

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