日本丛林鸦（大嘴乌鸦）的近视力
Near-field visual acuity in Japanese jungle crows (Corvus macrorhynchos).
作者信息
Yamamoto K, Furuya I, Watanabe S
机构信息
Department of Psychology, Keio University, 2-15-45 Mita, Minato-ku, Tokyo 108-8345, Japan.
出版信息
Physiol Behav. 2001 Jan;72(1-2):283-6. doi: 10.1016/s0031-9384(00)00356-5.
The near-field visual acuity of three Japanese jungle crows (Corvus macrorhynchos) was determined by means of operant conditioning. The task was discrimination of grating stimuli, and the threshold was measured by up-and-down method between sessions. To keep observing distance constant, a photo sensor was used and the head position was behaviorally fixed. The average visual acuity was 8.4 cycles/degree. When compared with other birds, this result is better than that of pigeons, and worse than that of predators.
通过操作性条件反射测定了三只日本丛林鸦（大嘴乌鸦）的近场视敏度。任务是辨别光栅刺激，并在各实验环节之间采用上下法测量阈值。为保持观察距离恒定，使用了光电传感器，并通过行为方式固定头部位置。平均视敏度为8.4周/度。与其他鸟类相比，这一结果优于鸽子，但不如食肉动物。
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