Sandell M, Agrell J, Erlinge S, Nelson J
Department of Ecology, Animal Ecology, University of Lund, Ecology Building, S-223 62, Lund, Sweden.
Oecologia. 1990 Jun;83(2):145-9. doi: 10.1007/BF00317745.
In a sample of 240 juvenile field voles 8% of the males and 22% of the females reached sexual maturity within their natal home range. Among individuals retrapped as adults, 58% of males and 23% of females had dispersed, i.e. had moved more than one home range diameter. The mean distance moved for males (58.5 m) exceeded that for females (28.6 m). Male movement distances were negatively associated with total density, and with density of adult females, but not with male density. Female movements were not related to population density. There were no relation between sex ratio and distance moved. The distribution of distances moved for both males and females fit a geometrical distribution, suggesting the importance of competitive processes.
在240只幼年田鼠的样本中，8%的雄性和22%的雌性在其出生的活动范围内达到性成熟。在成年后被重新捕获的个体中，58%的雄性和23%的雌性已经扩散，即移动超过了一个活动范围直径。雄性移动的平均距离（58.5米）超过了雌性（28.6米）。雄性的移动距离与总密度以及成年雌性的密度呈负相关，但与雄性密度无关。雌性的移动与种群密度无关。性别比例与移动距离之间没有关系。雄性和雌性移动距离的分布符合几何分布，这表明竞争过程的重要性。
