Similar at-sea behaviour but different habitat use between failed and successful breeding albatrosses

Ponchon, A., Gamble, A. , Tornos, J., Delord, K., Barbraud, C., Travis, J. M.J., Weimerskirch, H. and Boulinier, T. (2021) Similar at-sea behaviour but different habitat use between failed and successful breeding albatrosses. Marine Ecology Progress Series, 678, pp. 183-196. (doi: 10.3354/meps13880)

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Abstract

Breeding failure is expected to induce behavioural changes in central place foragers. Indeed, after a failed reproductive attempt, breeding individuals are relieved from having to return to their breeding site for reproductive duties and thus are less constrained than successful breeders in their movements during the remainder of the breeding season. Accordingly, they are expected to adjust their behaviour, travelling longer in distance and/or time to reach foraging grounds. They are also expected to use different foraging areas to decrease local intra-specific competition with successful breeders. We compared the at-sea behaviour and habitat use of successful and failed Indian yellow-nosed albatrosses nesting in Amsterdam Island, Southern Indian Ocean, during 2 chick-rearing seasons. Failed breeders exhibited the same at-sea foraging behaviour, travelling as far and as long as successful breeders. They also spent the same amount of time on their nest between at-sea trips. Nevertheless, habitat models revealed partial spatial segregation of failed breeders, which used specific foraging areas characterized by deeper and colder waters in addition to the areas they shared with successful breeders. Our study shows the importance of combining a range of analytical methods (spatial analysis, behavioural inferences with advanced movement models and habitat models) to infer the at-sea behaviour and habitat use of seabirds. It also stresses the importance of considering individual breeding status when aiming to understand the spatial distribution of individuals, especially when this information may have conservation implications.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Gamble, Dr Amandine
Authors: Ponchon, A., Gamble, A., Tornos, J., Delord, K., Barbraud, C., Travis, J. M.J., Weimerskirch, H., and Boulinier, T.
College/School:College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:Marine Ecology Progress Series
Publisher:Inter Research
ISSN:0171-8630
ISSN (Online):1616-1599
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in Marine Ecology Progress Series 678: 183-196
Publisher Policy:Reproduced under a Creative Commons License

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