Natal dispersal in relation to population density and sex ratio in the field vole,Microtus agrestis |
| |
| Authors: | M. Sandell J. Agrell S. Erlinge J. Nelson |
| |
| Affiliation: | (1) Department of Ecology, Animal Ecology, University of Lund, Ecology Building, S-223 62 Lund, Sweden;(2) Present address: Department of Wildlife Ecology, Swedish University of Agricultural Sciences, S-901 83 Umeå, Sweden |
| |
| Abstract: | Summary 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. |
| |
| Keywords: | Natal dispersal Inbreeding avoidance Population density Sex ratio Microtus agrestis |
| 本文献已被 PubMed SpringerLink 等数据库收录！ |
|
