Détail de la notice
Titre du Document
Nonshivering thermogenesis in four rodent species from Kubuqi desert, Inner Mongolia, China
Auteur(s)
BAO Wei-Dong ; WANG De-Hua ; WANG Zu-Wang
Résumé
We examined the capacity for nonshivering thermogenesis in four rodent species residing in the Ordos Plateau of Inner Mongolia. Nonshivering thermogenesis (NST, maximum NST minus resting metabolic rate) was determined fornorthern three-toed jerboas (Dipus sagitta), midday gerbils (Meriones meridianus), desert hamsters (Phodopus roborovskii), and striped hamsters (Cricetulus barabensis) in spring (May), summer (July), and autumn (October) captured in the Kubuqi desert in 1997. NST was induced by norepinephrine (NE) and measured by using the closed-circuit respirometer at 27 °C. Our results showed significant increases from summer to autumn in NST for the four species. NST capacities were 0.52′0.27 ml O2/g0.73.h (n = 7) in summer and 2.49′1.29 (n = 6) in autumn for jerboas, 1.61′0.74 (n = 6) in summer and 3.26′1.35 (n = 5) in autumn for gerbils, 3.62′0.75 (n = 5) in summer and 9.71′2.81 (n = 6) in autumn for desert hamsters, and 6.81′3.02 (n = 8) in summer and 11.23′2.77 (n = 8) in autumn for striped hamsters. These results suggest that small mammals living in the inland arid region of Ordos Plateau adapt to their extreme environment physiologically by adjusting their thermogenic capacities to cope with the dramatic seasonal temperature fluctuations.
Editeur
Academia
Identifiant
ISSN : 0139-7893 CODEN : FOZODJ
Source
Folia zoologica (Brno) A. 2002, vol. 51, SUP, pp. 9-13 [5 pages]
Langue
Anglais
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