关键词: 中华山蝠, 翼, 形态, 发育, 翼载

Abstract: Postnatal changes in wing morphology were studied in Chinese noctule（Nyctalus plancyi） from 2012 to 2014. Wing measurements increased linearly in the early postnatal growth period, and then the rate of growth decreased. The growth rate of arm-wings length decreased at the age of 25 days while the growth rate of wingspan, area of wing and arm-wing decreased at the age of 30 days. The hand-wings length and hand-wings area showed linear growth until 40 days of age. The length of arm-wings developed fastest and reached 80.9% of adult’s value at the age of 28 days. The wing loading of new born pups was (16.27±2.46) N/m2, which increased linearly to a maximum of （18.55±2.92）N/m2 at 14 days of age, and thereafter decreased to a minimum of 80.0% of adult’s wing loading at 35 days of age. The observations on flight showed that at the age of 15-30 days the young were able to flutter their wings; at the age of 30-40 days they flew for a short distance and at the age of 40-50 days they exhibited sustained flight. The results implied that the wing of N. plancyi developed fast before they exhibited clumsy flight, thereafter, the young bats slowed down the growth rate of body mass and wing loading to obtain sustained flight quickly. Of the three nonlinear growth models (Logistic, Gompertz, and von Bertalanffy), the Gompertz equation provided the best fit to the empirical curves for wingspan. The Gompertz and Von Bertalanffy equations both fitted the postnatal changes in wing area better than the Logistic equation.

Key words: Development, Morphology, Nyctalus plancyi, Wing, Wing loading