摘要
研究了分布于我国大、小兴安岭林区松鼠体重、身体热值、脂肪含量、灰分含量以及水分含量的季节变化。松鼠体重存在明显的季节性变化和性别差异 ,春季 ,雄性松鼠体重明显小于雌性个体 ,而其它季节 ,雄性大于雌性。冬季体重最低(3 3 1 .9～ 3 45 .1 g) ,秋季体重最高 (3 78.1～ 3 89.9g) ,体重降低了 9.41 %～ 1 4.0 7%。大、小兴安岭松鼠身体热值、脂肪含量和水分含量季节变动范围为 6.2 71～ 8.60 9k J/g和 6.891～ 8.41 3 k J/g,8.81 %～ 2 1 .3 7%和 9.47%～ 2 2 .0 1 % ,67.1 2 %～73 .3 8%和 66.3 5 %～ 71 .73 % ;灰分含量不存在季节差异 ,大、小兴安岭年平均值分别为 1 2 .0 4%± 1 .1 7%和 1 1 .2 7%±2 .0 7%。环境温度。
A total of 107 red squirrels Sciurus vulgaris mantchuricus were captured year round from Fenling Nature Reserve and Huzhong Nature Reserve.The former locates in south part of the Xiao Xing'an Mountains (128°59′~129°15′E, 47°01′~47°19′N) with the mean temperature of -0 5 ℃ and the extreme temperature of 34 9 ℃ in summer and -41 5 ℃ in winter While the later locates in middle part of D\-a Xing'an Mountains (122°39′~124°20′E,48°06′~48°21′N), the mean tempreature there is -0 4 ℃, and extreme temperatures is 31 5 ℃ in summer and -49 ℃ in winter. The eco\|physiological indices of body condition,such as content of energy density,lipid contents,ash, water contents and weights of carcass were measured.There was a significant difference in the body weight between spring and summer.In spring the body mass of males was lighter than females (348 7±11 3 VS. 357 7±13 1 for Lesser Xing'an Mountains and 333 7±12 2 VS 348 6±14 6 in Daxing'an Mountains), but in summer the males became heaver than Females (340 8±14 7 VS. 328 8±0 0 in D\-a Xing'an Mountains). The Carcass mass peaked in autumn (378 1~389 9g) and was lowest in winter (331 9~345 1g) for both the study areas,the difference was 9 41%~14 07% between the two seasons. Energy density in biomass of animal bodies ranged seasonally from 6 271 to 8 609KJ/g in Daxing'an Mountains, from 6 891 to 8 413KJ/g in Xiao Xing'an Mountain. The seasonal variation in lipid content between the two regions were 8 81%~21 37% and 9 47%~22 01%, respectively. And the seasonal variations of water contents in the two regions were 67 12%~73 38% and 66.35%~71 73%, respectively. All eco\|physiological indices (except water content) declined as carcass mass reduced during winter. However, no significant seasonal changes were founded in ash contents, with the annually average of 12 04%±1 17% and 11 27%±2 07% in Daxing'an Mountain and Xiao Xing'an Mountain, respectively. The main factors that might influence the seasonal variation of carcass mass and composition were ambient temperature, food condition, and differences between the both sexes.
出处
《生态学报》
CAS
CSCD
北大核心
2002年第11期1995-2000,共6页
Acta Ecologica Sinica
基金
黑龙江省自然科学基金资助项目
