静岡県北部のツキノワグマ

―狩猟報告書の検討―

抄録

In order to know the life of the black bear, Selenarctos thibetanus, the analysis was made by the writer based on the hunting reports in the north district of Shizuoka pref. in central part of Japan.
83 individuals were captured by traps or sporting guns from Apr. 1968 to June 1973.
The number of males captured was twice of females and the sex ratio was 204: 100. The immatures occupied 12.0 per cent of the whole, but the rate of immatures and sex ratio between individuals captured by traps and sporting guns were different.
The wild bear is a solitary animal and rarely seen with other ones. When two or more individuals consitute a group, they are always mother and her child. According to the points of captures and observations in the active season, their life seems to depend upon the broad leaved forest. In the aff orestation the rate of captures and observations increases in July and August.