La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Water temperature sampling by foraging Brunnich's Guillemots with bird-borne data loggers
Auteurs :	Y. Watanuki, Auteur ; F. Mehlum, Auteur ; A. Takahashi, Auteur
Type de document :	Article
Dans :	Journal of Avian Biology (32(2) JUN 2001)
Article en page(s) :	189-193
Langues:	Anglais
Résumé :	We describe the features of waters where seabirds were feeding by sampling vertical water temperature profiles with data loggers mounted on five Brunnich's Guillemots in Svalbard, Norway. The guillemots foraged in a cold water (-0.5-0.5 degreesC SST (sea surface temperature)) by making 1.8 dive bouts in short trips (32-257 min duration) as well as in moderate (0.5-2.0 degreesC SST) and warm waters (2.5-4.0 degreesC SST) by making 6.0 dive bouts during long trips (411-688 min duration). Judging from out bound flying time (15.7-24.4 min), time between dive bouts (23.9-43.3 min) and water types, the birds probably fed in fjord or coastal waters during short hips and in both coastal and offshore waters during long trips. Water temperature and diving behaviour can be simultaneously recorded by small data loggers, which therefore will provide useful information on marine features and foraging activity of top predators.

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