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

LI Shi Yi ① LI Hai Feng ② YANG Hong Ying ① LI Li Qin ① (①Nankai Vocational School Tianjin 300111;\ ②Department of Biology, Tianjin Normal University Tianjin 300074, China )  
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.
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