关键词: 绒山蝠, 生态, 栖息地, 繁殖, 冬眠

Abstract: The bat, Nyctalus velutinus G.M.Allen, which is distributed in South China has been observed on ecoloical characteristics, for 3 years since 1980, in Wuhu, Anhui. The results obtained are as follows:1. Most of them live in buildings together with little house-bat(Pipistrellus javanicus abramus). Their yearly and daily cycles of activity are shorter than that of the latter.2. This species mates about October. Spermatozoa are stored in the female reproductive tract throughout the winter, so that spermatozoa are found in the uterus during the period of hibernation. Ovalation occurs at the end of March or in early April; the gestation period lies probably between 50 and 60 days. Twin youngs are born at the time in mid-May and late June. The young bats reach sexual maturity during their first year of life. The epididymis of males are full of spermatozoa from October to the early April of next year. The sperm head measures 4.8 μ (range, 4.2-5.4) ×2.6 μ(1.8- 3.0)) the midpiece 15.7 n(13.4-20.0) ×1.0 μ(0.8-1.2), and the tail 47.4μ(38.7-51.0).3. They hibernate in early or mid-November and wake up in late March or early April next spring. The period of hibernation is probably 140 days. During this time (hibernation), Their tody weight, liver and fat all are decreased. Red blood cell and hemoglobin are changed apparently. From winter to spring the natural mortality of the bat is about 26.3 percent. Before mid-March the dead number is less, only occupying about 5.25 per cent (table 3).

Key words: Nyctalus noctula velutinus, Ecology, Habitat, Reproduction, Hibernant