earticle

영어

To determine which external cues from females evoke the body undulation of male Hynobius leechii, a representative courtship behavior, we examined visual, tactile, and chemical cues of females and also determined whether or not direct female contacts by males were required for males to receive female chemical cues. Each male was allowed to mate with a female before and after each cue treatment for 30 min. When only visual cues of females were allowed, fewer males conducted the body undulation, and the number of body undulation significantly decreased. Despite Co2+ exposure that destroyed the mechanosensory lateral line system of male salamanders, the number of males conducting the body undulation and the number of body undulation were not significantly changed. While, when both nostrils were blocked with sponges soaked to Vaselin, significantly fewer males conducted the body undulation and the number of body undulation decreased. When we allowed only partial contacts of males to females or completely blocked the contacts, but allowed exposure to female chemical cues, the number of males conducting the body undulation significantly decreased. These findings suggest that chemical cues of females who are freely interacting with males, not partial contacts, evoke the male body undulation.