La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Weather conditions and date influence male Sage Grouse attendance rates at leks (2019)
Auteurs :	Aleshia L. Fremgen, Auteur ; Christopher P. Hansen, Auteur ; Mark A. Rumble, Auteur ; R. Scott Gamo, Auteur ; Joshua J. Millspaugh, Auteur
Type de document :	Article
Dans :	Ibis (161(1) January, 2019)
Article en page(s) :	35-49
Résumé :	For lek-breeding birds, lek attendance can be correlated with mating success. Variability in lek attendance could confound interpretation of male reproductive effort and complicate the use of lek counts as an index to monitor abundance. We assessed the daily probability of male Sage Grouse Centrocercus urophasianus lek attendance and explored implications of attendance on lek counts. We fitted 145 males with global positioning system (GPS) transmitters over 4 years in Carbon County, Wyoming. We evaluated influences of lek size and topography, date, weather, and bird characteristics such as age on daily morning lek attendance. The daily probability of attendance ranged considerably each year, from 0.120 (x over bar , 95% CI 0.051-0.259) in 2012 to 0.917 (95%

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