Meta‐population evidence of oriented chain migration in northern gannets (Morus bassanus)

Frontiers in Ecology and the Environment - Tập 10 Số 5 - Trang 237-242 - 2012
Jérôme Fort1,2, Emeline Pettex3,4,2, Yann Tremblay5, Svein‐Håkon Lorentsen6, Stefan Garthe7, Stephen C. Votier8, Jean Baptiste Pons3, François Siorat9, Robert W. Furness10, W. James Grecian8, Stuart Bearhop11, William A. Montevecchi12, David Grémillet3,13
1Department of Bioscience, Aarhus University, Roskilde, Denmark
2these authors contributed equally to this work
3Centre d’Ecologie Fonctionnelle et Evolutive, Montpellier, France
4Centre de Recherches sur les Ecosystèmes d'Altitude, Observatoire du Mont-Blanc, Chamonix, France
5Institut de Recherche pour le Développement, Centre de Recherche Halieutique Méditerranéenne et Tropicale, Sète, France
6Norwegian Institute for Nature Research, Trondheim, Norway
7Research and Technology Centre, University of Kiel, Büsum, Germany
8Marine Biology and Ecology Research Centre, University of Plymouth, Plymouth, UK
9Station LPO de l'Ile Grande, Pleumeur-Boudou, France
10College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
11School of Biosciences, University of Exeter, Penryn, UK
12Cognitive and Behavioural Ecology Program, Memorial University of Newfoundland, St John's, Canada
13Percy FitzPatrick Institute, Centre of Excellence, University of Cape Town, Rondebosch, South Africa

Tóm tắt

Although oriented migrations have been identified in many terrestrial bird species, the post‐breeding‐season movements of seabirds are generally regarded as dispersive. We used geolocator tags to reveal post‐breeding movements and winter distribution of northern gannets (Morus bassanus) at a meta‐population scale. By focusing on five breeding colonies of European gannets, we show that their breeding and wintering grounds are connected by a major flyway running along the coasts of Western Europe and Africa. Moreover, maximum winter distance to colony was similar across colonies despite their wide latitudinal range. In contrast with the general opinion that large pelagic birds such as gannets have unlimited ranges beyond the breeding season, our findings strongly suggest oriented chain migration in northern gannets (a pattern in which populations move uniformly southward) and highlight the benefit of meta‐population approaches for studying seabird movements. We argue that the inclusion of such processes in ocean management plans is essential to improve efforts in marine biodiversity conservation.

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Frontiers in Ecology and the Environment

Tập 10 Số 5

237-242

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