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《ACTA THERIOLOGICA SINICA》 1994-02
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STUDIES ON THE VARIATIONS OF BROWNADIPOSE TISSUE AND NONSHIVERINGTHERMOGENESIS IN A HIBERNATOR(ERINACEUS EUROPAEUS)

SUN Jinsheng ZENG Jinxiang(Department of Biology . Tianjin Normal University, Tianjin , 300074)  
The variations of nonshivering thermogenesis (NST) and brown adipose tissue( BAT) in weight and ultrastructure were studied in the hedgehogs (Erinaceuseuropaeus) , so as to deal with the function of BAT during arousal from hibernation.The results showed that, the relative weight of BAT in hedgehogs was the lowest( 0. 23%) in summer(Julyl ,and increased rapidly in autumn ,the highest value of relativeweight was observed in the prehibernation (November) ; no variations were observed inthe hibernating hedgehogs, but decreased rapidly during arousal from hibernation(0. 32%). The variation of BAT were related to the heat production during arousal. Thenumbers and sites of fat droplets and mitachondria cristaes of BAT in the prehibernatingand hibernating hedgehogs were higher than that in the posthibernating hedgehogs , andshow the hibernating hedgehogs could be able to produce heat rapidly during arousalfrom hi bernatoin.The results also showed that the thermoneutral zone was the ranges 25℃ to 27℃and the lowest RMR (mlO_2/g/h) was 2. 577±0. 654 in the awaking hedgehogs , over theTa. ranges O℃ to the low artical temperature, a significantly negative correlation and aregression was observed between the Ta. and the RMR; The lowest RMR was 0. 064 atthe Ta. of 5 ℃ in the hibernating hedgehogs, and the Ta. also affected RMR.The NE-NST was expressed in two forms: the maxmium metabolic response toNE (NSTmax), and the absolute increase in oxygen consumption ( (NSTmax-RMR ) /RMR%). NSTmax in the awaking hedgehogs was higher than that in the hiber-nating hedgehogs, and show the body temperature of hibernating hedgehogs inhibitedthe metabolic rate; The absolute increase in oxygen consumption in the awaking hedge-hogs was lower than that in the hibernating hedgehogs , and show the NE-NST was themain heat source during arousal from hibernation.
【CateGory Index】: Q959.831
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