La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Resting Metabolic Rates of Adult Northern Shrikes (Lanius excubitor) Wintering in Northern Wisconsin (2015)
Auteurs :	James D. Paruk, Auteur ; Sheldon J. Cooper, Auteur ; Anna O. Mangan, Auteur ; Ryan S. Brady, Auteur ; Logan Tucker, Auteur
Type de document :	Article
Dans :	Wilson Journal of Ornithology (The) (127(3) September, 2015)
Article en page(s) :	510-514
Résumé :	ABSTRACT Resting metabolic rate (RMR) represents a significant component of an animal?s energy budget and is correlated with ecological, physiological, and life-history parameters. We measured resting metabolic rates of 14 adult Northern Shrikes (Lanius excubitor) wintering in northern Wisconsin (Ashland and Bayfield Counties) over a 2-year period (Jan?Apr 2008 and 2009). The average (±SE) RMR was 3.09 ± 0.45 ml O2/g/hr (range 2.46?3.83) from the first reported RMR values for adults of this species from the Neartic. Our RMR values were 50% higher than RMRs gathered from summer adult Northern Shrikes in the Paleartic. These data suggest Northern Shrikes exhibit seasonal variation in their RMR as a potential means of winter acclimatization.
En ligne :	http://dx.doi.org/10.1676/14-061.1

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