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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Can individually characteristic calls be used to identify long-distance movements of Corncrakes Crex crex?
Auteurs :	Gunvar Mikkelsen, Auteur ; Svein Dale, Auteur ; Thorstein Holtskog, Auteur ; Michal Budka, Auteur ; Tomasz S. Osiejuk, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (154(3) JUL 2013)
Article en page(s) :	751-760
Langues:	Anglais
Résumé :	Movements of animals at large spatial scales are important in ecology and conservation biology, but current methods for monitoring long-distance movements (e.g. ringing or telemetry) are resource demanding and limit sample sizes. Many birds have individually characteristic calls and songs, and recordings may provide an alternative method for monitoring movements. Previous studies have shown that Corncrake Crex crex night-time calls are individually characteristic. We recorded and analysed Corncrake calls from 60 different territories (30 % of all known territories) in two widely separated areas of Norway in one breeding season to assess the potential of recordings to identify individuals that had moved. Due to extensive mowing of meadows, many territories were used for only a short time, and Corncrakes appeared in new places throughout the breeding season, suggesting movements. By using recordings from the same territory during different nights as a measure of variability within individuals, and recordings from different territories during the same night as a measure of variability between individuals, discriminant analyses indicated that

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