中华姬鼠巢区的研究

中华姬鼠是亚热带山地常绿阔叶林内的优势种。本文报道了用标志重捕流放法,研究该鼠不同个体的巢区大小、相互关系以及在样地上的分布等一些生态学资料。

HOME RANGE OF A.DRACO (BARETT-HAMILTON)

The home range study of Apodemus draco, which ran from May, 1983 to April, 1984 was carried out in a subtropical mountainous evergreen broad-leaf forest,Jingdong County,Yunnan Province. The trapping grid covered an area of 2 ha,and consisted of 200 points,10 m apart,with 1 trap at each point. Home ranges were estimated by mark and release trapping method,and this field work was done from 10th to 24th every month.Material consisting of a total of 3504 captures for 143 individuals was collected. Using exclusive boundary strip method, areas were calculated.with the increase of trapping times, home ranges became greater in size. So it's necessary to estimate trapping times for getting certain ranges at first.The results studied showed 10 trapping times were reasonable.The mean home range of male adults was 4520.6±491.4m2,larger than that of female adults(2390.5±171.6m2).Home range of juveniles was smaller than that of adults.With habitat variation encountered on the grid, one might expect mice to occupy some parts of the grid in preference to others. To test this idea, the trapping on the slop and the plain of grid were scored separately and discovered that during dry season from Nov. to May, the plain was more "prefered" by mice while the slope was avoided.Home ranges of the individuals at different sexes and ages often overlapped one another.The amount of overlap in home ranges of both sexes for adults at all seasons was investigated.Between male and female individuals, their overlap amount in May-Oct.was larger than that in Nov.-Jan.. There was a significant difference in overlap amount for both sexes between Aug.-Oct. and Nov.-Jan.. The changing of spatial relationships in the mouse population has relation to reproductive activity to certain extent,is not due to shift of home ranges.