中华鳑鲏空间认知能力的性别差异

Sex differences in spatial cognition ability of Rhodeus sinensis

选择16尾中华鳑鲏作为研究对象,对鳑鲏鱼类两性间空间认知能力的差异进行研究。试验使用T型迷宫装置,比较经过训练的雌雄个体进入目标位置所需的消耗时间、方向选择的正确率以及达到学习标准所需的训练次数。数据显示,雌性个体组训练前后的消耗时间变化及方向选择的正确率均大于雄性个体组,而达到学习标准所需的训练次数少于雄性组。试验结果表明处于生殖季节的中华鳑鲏,在经过训练后,都能够完成特定的空间认知任务,但两性间在空间认知能力上存在明显差异,生殖期的雌鱼相对雄鱼具有更好的空间学习能力。

In the present study,differences of spatial learning and memory ability between male and female bitterling,Rhodeus sinensis,were investigated using T-maze.A faster decline in mean latency and higher percentage of correction were detected in the trained female bitterling.The times of training trials reaching the criterion was also lower in female than that in male.The results showed that,both male and female bitterlings were able to learn a spatial task after being trained.However,there were significant gender differences in reproduction season,with the capability of spatial cognition in female excelled that in male.