La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Extended incubation recesses by alpine-breeding Horned Larks: a strategy for dealing with inclement weather?
Auteurs :	Elizabeth C. MacDonald, Auteur ; Alaine F. Camfield, Auteur ; Jill E. Jankowski, Auteur ; Kathy Martin, Auteur
Type de document :	Article
Dans :	Journal of Field Ornithology (84(1) MAR 2013)
Article en page(s) :	58-68
Langues:	Anglais
Résumé :	Incubating birds can incur high energetic costs and, when faced with a trade-off between incubation and foraging, parents may neglect their eggs in favor of their own somatic needs. Extended incubation recesses are an example of neglect, but they are often treated as outliers and largely overlooked in studies of incubation behavior. We studied incubation rhythms of Horned Larks (Eremophila alpestris) on Hudson Bay Mountain, British Columbia, Canada, during four breeding seasons. Incubation recesses averaged 10.92 +/- 0.38 min (N= 4076 2-h periods), but we observed 70 extended recesses, ranging from 59 to 387 min in duration, at 35 nests. Although rare (

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