宁陕齿突蟾蝌蚪的生物学特性  

Biological Characteristics of tadpoles of the Ningshan alpine toad Scutiger ningshanensis Fang,1985

作　　者：陆宇燕[1] 李丕鹏[1] 梁刚[2] 李昂[3] 周正彦[3] 王勇[3] 

机构地区：[1]陕西师范大学生命科学学院 [2]School of Life Science,Shaanxi Normal University [3]沈阳师范大学生命科学学院,辽宁沈阳110034

出　　处：《动物学报》2007年第2期383-389,共7页ACTA ZOOLOGICA SINICA

基　　金：国家自然科学基金项目(No.0470206);沈阳师范大学特聘教授专项基金支持;~~

摘　　要：The Ningshan alpine toad Scutiger ningshanensis Fang, 1985 is a rare endemic toad living in alpine area of the Qinling Mts. in China. It has the most northeastern distribution of any species in the genus Scutiger. Only the holotype and allotype have been collected for the last 20 years during field surveys, and its biology is poorly studied. This report confirms that a special type of tadpole found in the type locality belongs to S.ningshanensis. A remarkable and uniform character of the tadpole is the presence of a golden “Y” shaped stripe on the posterior part of dorsum, similar to tadpoles of species of genus Vibrissaphora and Oreolalax lichuanensis (with a “U” stripe). The tadpole is morphologically typical of those which inhabit streams (Orton’s type Ⅳ larvae with LTRF I:5-5/I:5-5), but exhibits no special morphological adaptations for life in torrent streams. The tadpoles usually remain on or near rocks or sand and are positively phototactic. From an analysis of the population ecology of the tadpoles, it appears that the reproductive period of the toad is from June to August,and that hatching occurs between August and September. Tadpoles complete metamorphosis in about three years.The Ningshan alpine toad Scutiger ningshanensis Fang, 1985 is a rare endemic toad living in alpine area of the Qinling Mrs. in China. It has the most northeastern distribution of any species in the genus Scutiger. Only the holotype and allotype have been collected for the last 20 years during field surveys, and its biology is poorly studied. This report confirms that a special type of tadpole found in the type locality belongs to S. ningshanensis. A remarkable and uniform character of the tadpole is the presence of a golden ＂Y＂ shaped stripe on the posterior part of dorsum, similar to tadpoles of species of genus Vibrissaphora and Oreolalax lichuanensis （with a ＂U＂ stripe）. The tadpole is morphologically typical of those which inhabit streams （Orton＇s type IV larvae with LTRF I： 5-5iI： 5-5 ）, but exhibits no special morphological adaptations for life in torrent streams. The tadpoles usually remain on or near rocks or sand and are positively phototactie. From an analysis of the population ecology of the tadpoles, it appears that the reproductive period of the toad is from June to August, and that hatching occurs between August and September. Tadpoles complete metamorphosis in about three years .

关 键 词：宁陕齿突蟾 蝌蚪 种群生态 生长 发育 

分 类 号：Q95[生物学—动物学]