한국산 참개구리의 짝짓기 소리의 구조와 변이

초록

The structure and variation of mating call in Rana nigromaculata was studied in a population at Darakri, Ceongwon, Chungbuk in Korea. The mating call consists of 3 to 8 pulse groups divided by clear silent intervals. Each pulse group is also composed of fine pulses. Temperature and body size affect the temporal and spectral characteristics of the mating call. Pulse, pulse group repetition rate and dominant frequency rise with increasing temporature, whereas pulse group repetition rate and dominant frequency decrease with increasing body size. A playback experiment was designed to establish the effect of potential intruder on male calling. During the stimulus periods, resident males markedly decreased the pulse repetition rate, and increase the rate of pulse groups, dominant frequency, and the number of call group. This result indicates that this species responds in a graded fashion when interacting with other individuals.