한국산 금개구리의 짝짓기 행동과 울음 분석

초록

This study of Rana placyi, was done during the calling period at a pond in Osong, Chungbuk, Korea from may to the middle of august of 1996 and 1997. Five basic types of calls - A, B, C, D, E - were given to Rana plancyi according to the structure of call types. The structure of A type call has only one pulse, B type call has two pulses and C,D type call has one seperated pulse which is called introductory call and pulse group as follow it. On the other hand, E type call has 3-6 seperated pulses. The interval between introductory call and pulse group is 0.69+_0.24 sec. (N=159) in C type call and 0.60+_0.21 sec. (N=48) in D type call. The number of pulses in the pulse group is 28.92+_7.10 in C type call and 15.78+_2.31 in D type call. An increase in water temperature induces a decrease in C and D type call duration (C type call ; r=-0.4153, p<.001, D type call ; r=-0.7064, p<.001). In case of C,D type call, the interval between introductory call and pulse group much more influenced call duration than pulse group duration. We regarded A, B type call as a territorial call and C, D type call as a mating call and we estimated that E type call has the function of threat or alarm.