Matrai Eszter, Hoffmann-Kuhnt Matthias, Kwok Shaw Ting
Ocean Park, 180 Wong Chuk Hang Road, Aberdeen, Hong Kong.
Acoustic Research Laboratory, Tropical Marine Science Institute, National University of Singapore, 18 Kent Ridge Road, 119227, Singapore.
Behav Processes. 2019 May;162:112-118. doi: 10.1016/j.beproc.2019.02.003. Epub 2019 Feb 16.
Perceptual and behavioral asymmetry has been observed in a wide range of vertebrate and invertebrate species with its origin estimated to go back over 500 million years. Previously, hemispheric lateralization in marine mammals has been recorded during foraging, parental care, preferred swimming direction as well as when solving cognitive challenges. Visual laterality has been demonstrated in preferred eye use and performance accuracy. A female Indo-Pacific bottlenose dolphin was trained to associate eight pairs of non-identical visual stimuli. Her performance was tested and compared under binocular and monocular conditions. No significant difference was found in accuracy, while a clear left eye advantage was demonstrated in reaction time. In addition, behavioral asymmetry was observed in movement pattern preference during the stimulus discrimination.
在广泛的脊椎动物和无脊椎动物物种中都观察到了感知和行为上的不对称现象，其起源估计可追溯到5亿多年前。此前，海洋哺乳动物的大脑半球侧化已在觅食、亲代抚育、偏好的游泳方向以及解决认知挑战时被记录下来。视觉偏侧化已在偏好的眼睛使用和表现准确性方面得到证实。一只雌性印太瓶鼻海豚经过训练，能够将八对不同的视觉刺激联系起来。在双眼和单眼条件下对她的表现进行了测试和比较。在准确性方面未发现显著差异，但在反应时间上表现出明显的左眼优势。此外，在刺激辨别过程中的运动模式偏好方面也观察到了行为不对称。
