Cantalupo C, Bisazza A, Vallortigara G
Dipartimento di Psicologia Generale, Università di Padova, Italy.
Neuropsychologia. 1995 Dec;33(12):1637-46. doi: 10.1016/0028-3932(95)00043-7.
Evidence of lateral asymmetries in the direction of turning during escape behaviour in a species of poeciliid fish, Girardinus falcatus, is reported. When repeatedly faced with a simulated predator (in five successive sessions, spaced 7 days apart), immature Girardinus falcatus exhibited a significant population bias to turn right on the first session and a progressive bias to turn left in subsequent sessions. Mature Girardinus were then tested to check whether the shift in the direction of turn with repeated sessions depended on maturation or habituation. It was found that adult Girardinus showed a slight population bias to turn right in the first session and a strong subsequent bias to turn left after repeated sessions. The implications of these findings to our current understanding of the evolution of brain lateralization are discussed.
有报告称，在一种食蚊鱼（镰形食蚊鱼）的逃避行为中，存在转向方向的侧向不对称证据。当反复面对模拟捕食者时（在五个连续的实验环节中，每个环节间隔7天），未成熟的镰形食蚊鱼在第一个实验环节中表现出显著的群体偏向右转，而在后续实验环节中则逐渐偏向左转。随后对成熟的镰形食蚊鱼进行测试，以检查随着实验环节的重复，转向方向的变化是取决于成熟度还是习惯化。结果发现，成年镰形食蚊鱼在第一个实验环节中表现出轻微的群体偏向右转，而在实验环节重复后则强烈偏向左转。本文讨论了这些发现对我们当前对大脑侧化进化理解的意义。
