摘要: 囊鼠是一种营地下单洞穴居的鼠类,广泛分布于加利福尼亚州的农田、牧场和森林,危害甚大。作者在实验室条件下对两种襄鼠(Thomomys bottae和Thomomys mazama)的某些摄食行为进行了观察,得到以下结论: 1.囊鼠的摄食行为有8个组成部分,即:(1)暴露洞口;(2)探察洞外动静;(3)将食物拖入洞内;(4)储藏食物;(5)反复在洞外搜索剩余食物;(6)推土堵洞;(7)尝试及

摘要: 本文报道了休氏壮鼠一新亚种——休氏壮鼠云南亚种Hadromys humei yun-nanensis subsp.nov.。特征:体型较大,尾长短于体长;耳前有一棕色斑;齿隙较长;腭较短。模式标本采自云南瑞丽县,保存在云南省流行病防治研究所标本室。

摘要: 人工低气压舱模拟高原低氧,观察实验动物小白鼠、豚鼠及野生动物达乌尔鼠兔,在海拔5000米及8000米24小时内的几种生理效应,并与2300米海拔对照组进行了比较。发现随着海拔高度的升高:1.3种动物体重明显下降;2.肝糖原含量明显降低:小鼠、达乌尔鼠兔与豚鼠肝糖原在8000米时分别为2300米含量的62％,35％及 9％:3.小鼠、达乌尔鼠兔及豚鼠的肝脂肪累积量依次增大;4.肝蛋白质含量减少;5.SGPT与SGOT活力升高;6.肝细胞溶酶体的酸性磷酸酶与芳基硫酸脂酶活力升高。肝组织形态学观察结果与生化检测结果一致,豚鼠在8000米海拔时,肝细胞出现气球样变,脂肪变性及灶性液化性坏死等变化。综合分析,这3种动物对极度低氧的耐受性依顺序为小鼠、达乌尔鼠兔、豚鼠。

摘要: Many studies on models of growth of body weight in animals have been reported. This paper provides a model of growth of body weight in plateau pika (Ochotona curzoniae) under natural conditions. The data of growth of body weight in plateau pikas were obtained from the Haibei Alpine Meadow Ecosystem Reseach Station, Academia Sinica, from May to September in 1979 and from April to October in 1980 and 1981 (Tab. 1 and Tab. 2).The growth of body weight is divided into two stages:the young (0-29 days of life) and the juvenile (29-80 days of life). Body weight remains stable in the adult stage (after 80th day of life). The growth of body weight is quick in 0-29 days and slow in 29-80 days. A model of growth is constructed with the boundary problem of the Logistic equation (1)(1)wherew = body weight (g.)t= age in dayk= saturation boby weightr1 = instrinsic growth rateWi = mean born body weightws = mean observed value of body weight at 29th day of lifefor 0-29 days. The parameter r1 is only estimated according

摘要: 达乌尔黄鼠分布在我国北方及蒙古和苏联等区域,对牧草及农田危害甚大。有关达乌尔黄鼠的核型国内外已有报道(Lyapunova等,1970;蔡有余等,1985;马继霞等,1985)。签于其染色体的一些特征,达乌尔黄鼠有可能成为染色体工程及检测环境诱变剂等方面的实验材料。虽然苏联Lyapunova等(1978,1980)对黄鼠属某些种的G-带和C-带进行过比较研究,我国蔡有余等(1985)对达乌尔黄鼠的C-带和Ag-NOR进行了观察,但无法对其染色体进行逐个地准确识别,特别是对Χ染体色的正确识别。为此,我们对达乌尔黄鼠的显带染色体进行了较详细的研究。