ニザダイの群れ行動

概要

論文の詳細を見る
The social behaviors of Prionurus micralepidotus, one of the most common tangs or surgeon fishes along the southern coast of Japan, were studied both in the sea (Tanabe Bay, Wakayama Prefecture) and in a large tank (in the Suma Aquarium) in 1955,1956 and 1961. In the open sea, relatively large schools (average number of one school is about 20 individuals) were found on the large and deep offshore reefs, while schools on the small and shallow inshore reefs were small (average : about three individuals) and there were found even solitary and resided, or territorial individuals. In the large tank, ten individuals of this fish were brought to the tank one by one. The first to fifth specimens resided under the rock or rock shade and showed territorial behavior, whereas the next five specimens did not resided anywhere, but made schools and hovered. Moreover, three specimens out of five territorial fish joined these schooling individuals resolving their territories. From these facts, it seems that the social behavior type of P. microlepidotus is apparently effected by its population density as well as by the habitat condition, whether it is large or limited.
日本生態学会の論文
1964-10-01