Metabolic Thermogenesis of Siberian Accentor (Prunella montanella)
摘要
To study the characteristics of energy metabolism,metabolic rate (MR),body temperature (T b),and thermal conductance ( C ) were determined at a temperature range of 5-35?℃ in 5 male and 3 female Siberian accentors ( Prunella montanella ) from Qiqihar City of Heilongjiang Province from April to June in 2003.MR was measured by using closed circuit respirometer,T b was measured by insertion of a digital thermometer into the cloaca,and C was calculated using the formula: C = MR /( T b T a),where T a is ambient temperature.With a temperature range of 5-35?℃,Siberian accentors can keep their T bs stable 41 25±0 12?℃.The mean minimum MR was 4 27±0 07 mL O 2/(g·h). C was 0 26±0 00 mL O 2/(g·h·℃) with a temperature range of 5-26 5?℃.Within this range of temperatures,MR increased with the declining in T a,and the relationship between MR and T a can be described as: MR [mL O 2/(g·h)]=10 39-0 24 T a (℃) for Siberian accentors.The ecophysiological characteristics of Siberian accentors were high level in MR and T b,relative higher in C .These properties might make them adapt to their environments and survive at relatively colder areas.