ダルマガエルのなわばり行動について

概要

論文の詳細を見る
In the breeding season, some adult males of R. brevipoda show aggressive behaviors-making approaches, rushes and attacks-against others in paddy fields. But other non-aggressive adult males, females, juveniles and mating pairs do not show such behaviors. The aggressive males show highly aggressive behaviors mainly against the other aggressive ones. They also call frequently. When they try to call or show aggressive behaviors, they always take a high posture. But non-aggressive males rarely call, never show aggressive behaviors, and they usually stay in a low posture. If they take a high posture, they are attacked by aggressive males more frequently than when taking a low posture. Females and juveniles always stay in a low posture. Each aggressive male has his own range and his aggressive behaviors are observed mainly near the boundary. Within it the aggressive male is dominant and drives out invaders aggressively. Taking a high posture and making frequest calls seem to be declaration of dominance, and their ranges are regarded as territories by definition of defended areas. The role of the territory is supposed to be a place where an aggressive (territorial) male makes frequent calls-a mate attractive display.
日本生態学会の論文