Abstract: Effects of blood relations between individuals on the population dynamics in small mammals were reviewed. A number of studies suggested that the interaction between related individuals showed more amicable behavior , higher level of nest sharing than between unrelateded individuals.Blood relations can also influence territory and dispersal in microtine rodents. Some studies found the changes of the degree of relatedness can alter the growth rate of population. Lambin and Krebs suggested that relatedness can influence the demographic characters , such as density , female survival success , offspring weaning success , offspring viability and sex ratio , and this hypothesis has been tested by a number of studies. The tools of molecular genetics began to be used in the ecological research. At resent , most of molecular research of blood relations were focused on parental identification and the analysis of the genetic structure of population.

Key words: Blood relations, Small mammals, Population dynamics, Spatial behavior, Population demographic character, Molecular ecology

摘要： 主要综述小型哺乳动物亲缘关系对其种群动态的作用及其研究进展。与非亲缘个体比较, 亲缘个体间的相互作用趋于亲密、巢区共享程度高, 亲缘关系水平对扩散有明显的作用。亲缘关系水平的差异可改变种群增长速率及种群统计学特征, 对提高雌体存活率、后代断乳成功率、后代存活率及性比具有显著的作用。亲缘关系的分子生态学研究主要集中于亲权鉴定和种群遗传结构的分析。

关键词: 亲缘关系, 小型哺乳动物, 种群动态, 空间行为, 种群统计学特征, 分子生态学