我国12种无尾类的鸣叫特征参数

The Acoustic Features of the Mating Call of 12 Anuran Species

分析了1 2种无尾类的求偶鸣叫特征参数,包括角蟾科(Megophryidae) 2种:峨眉角蟾(Megophrysomeimontis)、高山掌突蟾(Leptolalaxalpinus) ;雨蛙科(Hylidae) 2种:华西雨蛙(Hylaannectans)、秦岭雨蛙(H .tsinlingensis) ;树蛙科(Rhacophoridae) 5种:斑腿树蛙(Rhacophorusmegacephalus)、无声囊树蛙(R .mutus) ,宝兴树蛙(R .dugritei)、经甫树蛙(R .chenfui)、锯腿小树蛙(Philautusodontotarsus) ;蛙科(Ranidae)2种:弹琴水蛙(Hylaranaadenopleura)、沼水蛙(H .guentheri) ;姬蛙科(Microhylidae) 1种:花姬蛙(Microhylapulchra)。特征参数包括:(时域)时长和(频域)基频、主能峰、共振峰等9个。与已有的描述作了对比,发现差别较小,并简单讨论了差别出现的原因。此外,对同域分布且繁殖时间重叠的两个近缘种———宝兴树蛙和经甫树蛙的鸣叫比较发现,二者声音的9个参数除了音节间隔之外,差异都极其显著(P <0 0 0 1 ,α=0 0 5 ,two tailedtest) ,它们的鸣叫有显著差异。

The present paper deals with the mating calls of 12 anuran species, which belong to 5 families and 7 genera,and represented by:Megophryidae: Megophrys omeimontis, Leptolalax alpinus; Hylidae: Hyla annectans, H. tsinlingensis; Rhacophoridae: Rhacophorus megacephalus, R.mutus,R.dugritei, R.chenfui, Philautus odontotarsus; Ranidae: Hylarana adenopleura, H. guentheri; Microhylidae: Microhyla pulchra. The coefficient derived from the call is: call and note duration in the time domain and fundamental frequency,dominant frequency and formant.The parameters derived from 4 species are little different from what Matsui and Wu(2 species) and Mu and zhao (2 species)reported. After compared the mating call’s parameters between two allied species—R.dugritei and R.chenfui frogs, it’s found that both of them have the contemporary breeding time and shared the same habitats. All the 9 parameters are different significantly (P<0.001,α=0.05,two-tailed test) except note interval(t-test P=0.055;Mann-Whitney U test P=0.416 ). This suggested that the mating call is important for the female for conspecies discrimination between the closely related sympatric species.