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Seasonal variation in oceanographic habitat and behaviour of white-chinned petrels Procellaria aequinoctialis from Kerguelen Island

Citation

Peron, C and Delord, K and Phillips, RA and Charbonnier, Y and Marteau, C and Louzao, M and Weimerskirch, H, Seasonal variation in oceanographic habitat and behaviour of white-chinned petrels Procellaria aequinoctialis from Kerguelen Island, Marine Ecology Progress Series, 416 pp. 267-284. ISSN 0171-8630 (2010) [Refereed Article]

Copyright Statement

Copyright 2010 Inter-Research

DOI: doi:10.3354/meps08785

Abstract

Marine environments experience seasonal variation in physical and biological parameters, with consequent changes in predator distributions. During the breeding period, proximity to suitable feeding sites is essential for central place foragers, whereas during the non-breeding period their distribution is relatively unconstrained. We combined light-based geolocation and satellite tracking to investigate seasonal variation in foraging grounds and behaviour of white-chinned petrels from Kerguelen Island. Birds were associated with highly productive areas throughout the year. During breeding (summer), they performed long commuting trips from the colony to distant, productive Antarctic waters. Thereafter, birds migrated 5200 km westwards to the Benguela upwelling system off Namibia and South Africa to spend the winter. This seasonal shift of foraging grounds coincides with a change in activity patterns; much less time was spent in flight in winter than in summer. Individual variability in the locations of foraging zones and seasonal/daily activity patterns was low. Trip durations were shorter during chick-rearing than incubation, although birds often travelled as far or farther, tracking the gradual break up of pack ice. Habitat use models revealed an association with distance to sea-ice edge and chlorophyll a gradient during incubation, whereas sea surface temperature and chlorophyll a gradient best explained habitat use during chick rearing. White-chinned petrels are likely to overlap with other marine predators and fisheries throughout the year. Fishery bycatch constitutes the most significant direct threat to petrels at sea. Moreover, future climate-induced reductions in productivity could affect birds year-round.

Item Details

Item Type:Refereed Article
Keywords:foraging behaviour, activity, breeding, non-breeding ground, upwelling, sea ice, bycatch, geolocation, satellite tracking
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Biological Sciences
Author:Peron, C (Dr Clara Peron)
ID Code:92765
Year Published:2010
Web of Science® Times Cited:44
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2014-06-26
Last Modified:2014-07-30
Downloads:0

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