高原鼢鼠种群消长与繁殖特性的关系  

Relationships Between Population Size of Myospalax baileyi and its Reproductive Characteristics

作　　者：丁连生 张卫国 韩天虎 

机构地区：[1]甘肃省畜牧局草原处 [2]甘南州草原站

出　　处：《草业学报》1998年第4期49-54,共6页Acta Prataculturae Sinica

摘　　要：通过对高原鼢鼠３个具有不同栖息史的种群连续３年的观测，研究了种群数量消长与种群性比、怀胎率、胎仔数、繁殖强度间的对应关系。结果表明，高原鼢鼠在某一适生地栖息时间的长短对其种群数量的稳定具有决定性影响，即栖息史越长，种群稳定性越好；种群性比在１．０左右时，表明种群数量呈上升之势，在１．３左右时，种群数量处于相对稳定状态，大于１．５时，种群数量将趋于减少；种群中雄性个体的数量和比例与怀胎率、胎仔数和繁殖强度呈正相关，因而它的变化在一定程度上决定着种群数量的消长。The relationships between the fluctuation in Myospalax baileyi [WTBZ]population and its reproductive characteristics such as sex ratio (M/F), rate of pregnancy, litter size and reproductive intensity were studied through a 3 year investigation on 3 Myospalax populations with different history of habitation. It was shown that the population with the longest history of habitation was the most stable. A M/F ratio of some 1.0 was related to an increasing population size, a M/F of about 1.3 to a stable situation, and a ratio greater than 1.5 to a declining population state. The number of male individuals in the population was positively correlated to the rate of pregnancy, litter size and intensity of reproduction.

关 键 词：高原鼢鼠 种群消长 繁殖特性 

分 类 号：Q959.837[生物学—动物学]