SEASONAL-CHANGES IN THERMOREGULATION AND MAXIMUM METABOLISM IN THE YELLOW-NECKED FIELD-MOUSE

被引:21
作者
CYGAN, T
机构
来源
ACTA THERIOLOGICA | 1985年 / 30卷 / 1-8期
关键词
D O I
10.4098/AT.arch.85-4
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Seasonal changes in thermoregulation efficiency and basal metabolism rate (BMR) were studied in Apodemus flavicollis (Melchior, 1834). The animals had significantly greater body weight in winter than in summer and the body weight of females differed significantly from that of males. The average rectal temperature in winter was 37.0 .+-. 1.6.degree. C. There were two cases of spontaneous decrease in rectal temperature to 31.5 and 34.2.degree. C. During the experiments carried out in helium-oxygen mixture, a decrease in body temperature to as much as 15 and 12.degree. C was noted, without lethal effect. The maximum thermogenesis values extrapolated to -20.degree. C in summer reached 11.6 .+-. 0.8 ccm O2 .times. g-1 .times. hr-1 and extrapolated to -30.degree. C in winter reached 13.4 .+-. 1.6 ccm O2 .times. g-1 .times. hr-1. BMR in summer (2.9 .+-. 0.3 ccm O2 .times. g-1 .times. hr-1) did not differ significantly from that determined in winter (3.0 .+-. 0.4 ccm O2 .times. g-1 .times. hr-1). In summer, the maximum metabolism was four times higher, and in winter four and half times higher that the BMR.
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页码:115 / 130
页数:16
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