1986. Contribution of shivering in leg muscles to heat production in Japanese quail. Can. J. Zool. 64: 889-892. We estimated heat production in Japanese quail (Coturnix coturnix japonica) by measuring oxygen uptake using open-circuit respirometry as ambient temperature was decreased gradually from 26 to 3.5"C. At the same time, the intensity of shivering was estimated in both the leg muscles and the flight muscles by measuring electromyograms. Metabolic heat production increased in a linear fashion as ambient temperature decreased. Shivering intensity increased at the same linear rate in the leg muscles as in the flight muscles as ambient temperature decreased. The leg muscles produce a substantial fraction (about 114) of the total shivering heat production at low ambient temperatures. Shivering occurred in bursts; the onset of a burst in the leg muscles was precisely synchronized with the onset of a burst in the flight muscles.STEVENS, E. D., J. FERGUSON, V. G. THOMAS et E. HOHTOLA. 1986. Contribution of shivering in leg muscles to heat production in Japanese quail. Can. J. Zool. 64: 889-892. Nous avons estimk la production de chaleur chez des cailles japonaises (Coturnix coturnix japonica) en mesurant la consommation d'oxygkne au moyen d'un respiromktre a circuit ouvert, tout en abaissant graduellement la tempkrature ambiante de 26 a 3,5"C. L'enregistrement des klectromyogrammes dans les muscles des pattes et les muscles du vol a permis d'kvaluer en mCme temps I'intensitk du frissonnement. La production mktabolique de chaleur est fonction linkaire de la baisse de tempkrature. L'intensitk du frissonnement augmente selon le mCme taux linkaire dans les muscles des pattes et les muscles du vol a mesure que baisse la tempkrature. Les muscles des pattes sont responsables d'une fraction importante (environ 114) de la production de chaleur totale due au frissonnement lorsque la tempkrature ambiante est faible. Le frissonnement se produit par secousses; le dkclenchement du frissonnement dans les muscles des pattes est parfaitement synchronisk avec le dkclenchement du frissonnement dans les muscles du vol.[Traduit par la Revue]
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