A report for the ontogeny of schooling behavior in homo- and heterogeneous tadpole groups

To compare the ontogeny of schooling behavior between homo- and heterogeneous tadpole groups of the Japanese mountain frog (Rana ornativentris), I measured the schooling behavior of a pure group consisting only of siblings and a mixed group consisting of siblings and non-siblings weekly for 5 weeks. The mean individual and nearest-neighbor distances decreased with increasing ontogeny up to hindlimb development. However, there were no significant differences in mean distances between the pure and mixed tadpole groups. The heterogeneity prepared in this study did not affect the schooling behavior of this species.

为比较日本林蛙（Rana ornativentris）同质与异质蝌蚪群的集群行为个体发育规律，本研究以仅由同胞蝌蚪构成的纯同胞组，以及由同胞与非同胞蝌蚪共同构成的混合组为对象，连续5周每周测定其集群行为。结果显示，个体平均间距与最近邻间距均随个体发育进程逐渐减小，直至后肢发育阶段；但纯同胞组与混合蝌蚪组的平均间距并无显著差异。本研究设置的群体异质性并未对该物种的集群行为产生影响。