La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	On the spatial relationship of males on "exploded" leks: the case of Capercaillie grouse Tetra urogallus examined by GPS satellite telemetry
Auteurs :	Per Wegge, Auteur ; Jorund Rolstad, Auteur ; Ken Olaf Storaunet, Auteur
Type de document :	Article
Dans :	Ornis Fennica (90(4) 2013)
Article en page(s) :	222-235
Langues:	Anglais
Résumé :	The mating system of Capercaillie has been referred to as "exploded lek" because displaying males are spaced farther apart than on classical leks. However, inter-male distances and spacing behavior rarely have been quantified. In 2009-2011, we examined the spatial relationships of males on two leks in southeastern Norway by GPS satellite telemetry. Largely exclusive display territories (median 2 ha) surrounded the mating site, but the males spent most of the time displaying on smaller, well-defined display sites (median 182 m(2)) within their territories. When on their display sites, neighboring birds were spaced 64-212 m apart; decreasing to a minimum during the time of mating. Occasionally, males made long exploratory excursions (median 243 m) across the territories of neighbors, sometimes interacting with them at close distance (

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