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### 群居性啮齿动物集群重组率的估算

1. 农业虫鼠害综合治理研究国家重点实验室，中国科学院动物研究所
• 出版日期:2006-06-01 发布日期:2008-07-07

### ESTIMATING THE GROUP REFORMATIVE RATE FOR SOCIAL RODENT SPECIES

WAN Xinrong,ZHONG Wenqin,WANG Mengjun

• Online:2006-06-01 Published:2008-07-07

Abstract: A new procedure is proposed to estimate the group reformative rate of the group unit (s) for the social rodent species. The probability that two animals taken randomly from a group come from different original groups is used as a measurement of group reformative rate at a census. Moreover the expected group informative rate is also derived as an index to evaluate the preference during the regrouping period. An illustration of how to apply this method to estimate the group reformative rate of the communal over-winter nests of Brandt's vole in the typical steppe in Inner Mongolia grassland. Results revealed that the over-winter group reformative rate of this species is very low suggesting that many members of the same over-winter group came from the same family. Furthermore the group reformative rate is much lower than the expected group reformative rate which indicates that the Brandt's vole possess a high preference to select familiar individuals as group members during this period.