干旱对中国林蛙体长生长的影响

Effects of Arid Years on the Body Length and Growth of Rana chensinensis

运用椎骨年轮返算体长方法 ,分析了干旱年、正常年天津蓟县中国林蛙第 1至第 3年龄体长增长量。结果表明 ,干旱年体长生长减缓 ,t 检验差异显著或差异极显著。证实了代偿性生长在两栖类上的存在。做不同年份体长分布频率图比较之间差异 ,干旱年秋季出现大量体长极小的性成熟个体♂♂ <41mm ,♀♀≤ 40mm ,干旱年中国林蛙种群优势年龄组比正常年的推迟一年。

This paper deals with a method of body length calculation in Amphibia based on the clitellum of the vertebrae and the growth of 1-3 years old Rana chensinensis in Jixian County Tianjin China. The result shows that a drought affected the growth of 1-3 years old Rana chensinensis in Jixian County Tianjin China. Frogs grew significantly more slowly during arid years with more smaller adult frogs (♂♂<41?mm,♀♀≤40?mm) present in the autumn. The dominant age class of Rana chensinensis in arid years was a year younger than that in normal years . The results show that Amphibia have compensatory growth after arid years.