Shinozuka Kazutaka, Watanabe Shigeru
Department of Psychology, Keio University, Mita 2-15-45, Minato-ku, Tokyo, Japan.
Physiol Behav. 2004 Mar;81(1):141-8. doi: 10.1016/j.physbeh.2004.01.005.
The role of the telencephalon in the shoaling behavior of the goldfish, Carassius auratus, was investigated. Experiments were carried out in a tank divided into three compartments. Subjects were introduced into the center compartment of the tank. In the activity phase, subjects swam alone, and swimming distance was used as an index of activity. In the shoaling behavior phase, a stimulus fish was introduced into one of the side compartments, and the time spent near the side compartment by the subject was used as index of shoaling behavior. After these measurements were made, visual and motor abilities were examined using the optomotor response. Subjects then received surgery and the same procedure was repeated. In Experiment 1, the effects of total ablation of the telencephalon and a section of the olfactory tract (OlT) were examined. The ablation group exhibited reduced activity and shoaling behavior compared with the sham and OlT group. In Experiment 2, the role of the dorsal part of the telencephalon was examined after damaging the dorsomedial and dorsolateral telencephalon. Lesions in either portion had no effect and no simple visual or motor deficits were seen. These results suggest that the ventral part of the telencephalon mediates shoaling behavior.
研究了端脑在金鱼（Carassius auratus）集群行为中的作用。实验在一个分为三个隔室的水箱中进行。将实验对象放入水箱的中间隔室。在活动阶段，实验对象独自游动，游动距离被用作活动指标。在集群行为阶段，将一条刺激鱼放入其中一个侧隔室，实验对象在侧隔室附近停留的时间被用作集群行为指标。在进行这些测量后，使用视动反应检查视觉和运动能力。然后对实验对象进行手术，并重复相同的程序。在实验1中，研究了端脑完全切除和一段嗅束（OlT）切断的影响。与假手术组和OlT组相比，切除组的活动和集群行为减少。在实验2中，在损伤背内侧和背外侧端脑后，研究了端脑背侧部分的作用。任何一个部位的损伤都没有影响，也没有观察到简单的视觉或运动缺陷。这些结果表明，端脑腹侧部分介导集群行为。
