中华山蝠繁殖生态的研究

STUDY ON REPRODUCTIVE ECOLOGY OF NYCTALUS VELUTINUS

借助于Mini- 2型超声波接收器 ,采用标志重捕法 ,结合录音、录像、拍照等方法 ,对四川师范学院校舍的中华山蝠繁殖生态进行了研究。结果表明 :中华山蝠集群繁殖 ,产仔育幼期雌蝠与雄蝠分离 ,形成母子群。 4月中下旬开始受孕 ,5月下旬到 6月下旬产仔。多是一胎两仔 ,极个别一胎一仔。初生仔性比为 1 1∶1 (♀ ♂ ) ,幼蝠不选择母体 ,母蝠则只哺育自已的幼仔。幼蝠 5周龄后开始飞翔 ,独立生活前的成活率约为 72 2 0 % ,3个半月性成熟。当年仔参与交配。幼仔独立生活后 ,逐渐与母蝠分离。 9月中旬到 1 0月上旬交配 。

With mark recapture method and other methods such as sounds recording, photography, the reproductive ecology of Nyctalus velutinus in the campus of Sichuan Teachers’ College were studied, and got the following results Famale Nyctalus velutinus formed maternity colonies in old buildings in Summer and raised infants without the help of males which had left out They were gestated in middle or late April and labored in late May or early or middle June Females each bore 2 infants once, except a few only 1 The neonatal sex ratio was 1 1∶1(♀/♂) Young bats did not choose their mother, but mother bats only raised their own At the begining of the 6th week, the infants first began learning to fly and hunt for food themselves The survival rate before they could fly freely was 72 20% Young bats maturated at approximately of 3 and a half months of age, and would mate in the first Autumn