Behavioral and physiological studies on neuronal basis for lateralizedpredation in scale-eating cichlid fish

行为偏侧化在许多脊椎动物中都有记载，但其神经元基础的定义很少。在此，我们通过高速视频监控和行为偏侧化和运动学的定量评估研究了水槽中慈鲷的吃鳞行为。最大角速度和身体屈曲幅度在攻击时的优势侧比那些在非优势侧显着更大。在逃避反应中的声诱发屈曲中没有发现这种偏侧运动，这与吃鳞时的屈曲相似，表明吃鳞时控制身体屈曲的神经元回路可能在共同运动通路的上游功能性偏侧。

Behavioral lateralization has been documented in many vertebrates,but little has been defined for the neuronal basis of it. Here, we studied scale-eatingbehavior in cichlids in a tank through high-speed video monitoring and quantitative assessmentof behavioral laterality and kinematics. The maximum angular velocity and amplitude of bodyflexion were significantly larger during attacks on the preferred side compared to those onthe nonpreferred side. No such lateralized movement was found in acoustically evoked flexionduring the escape response, which is similar to flexion during scale eating, suggesting thatthe neuronal circuits controlling body flexion during scale eating may be functionallylateralized upstream of the common motor pathway.