La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Effects of age and experience on the responses of territorial and floater male Red-winged Blackbirds to models of receptive females
Auteurs :	Ken Yasukawa, Auteur
Type de document :	Article
Dans :	Journal of Field Ornithology (84(4) DEC 2013)
Article en page(s) :	377-388
Langues:	Anglais
Résumé :	The ability of sexually mature non-territorial floaters to sire offspring affects the success of floating as a breeding strategy. Red-winged Blackbirds (Agelaius phoeniceus) have second-year (SY) and after-second-year (ASY) floater males, and genetic studies suggest that floaters may gain paternity. Despite these studies, we still know little about the fitness costs and benefits of floating in this species. By presenting taxidermic models of females in soliciting, precopulatory postures in territories of experienced (previously attracted at least one mate in the study area) and inexperienced (did not previously defend a territory in the study area) males, I was able to examine the copulation behavior and success of floater male Red-winged Blackbirds as well as the effect of experience for territorial males. Floaters trespassed during 66.1% of presentations and 85.4% of trespassers were

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...