抄録
Many studies of sign stimuli eliciting social behavior in fish have been reported. However, these studies have almost dealt with differentiated behaviors such as mating, fighting and parental care etc., and investigations concerning sign stimuli eliciting approach behavior have rarely been carried out, except ONO's study with Oryzias latipes (3). He states that recognition of social behavioristic signs releasing the group cohesion acts as the starting point of various social behaviors. The aspect of approach of mates to one another appears in various social behaviors, and from approach as such actually social behavior seems to start (1, 2, 4, 5, 6, 7). The present work was directed towards analysing visual stimuli eliciting approach behavior in goldfish.
1. Visual stimuli for approach behavior in goldfish were analysed through the use of models of red color.
2. The moving stimulus sources were more attractive than the staying ones. For the mode of movement “free-swimming” was more attractive than “horizontal vibration”.
3. For the staying stimulus source the attractiveness of the fish model bearing no “eye” was not so greater than that of the rectangle, and that of the square was the smallest.
4. The horizontally elongate model bearing the “eye” on its head or on its pointed end was most attractive and nearly equaled the narcotized goldfish in attractiveness.
