Size discrimination in barn owls as compared to humans

Size discrimination in barn owls as compared to humans
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谷仓猫头鹰与人类相比的体型歧视

DOI:
10.1007/s00359-017-1241-1
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发表时间:
2018
期刊:
Journal of Comparative Physiology A
影响因子:
--
通讯作者:
Wagner H.
Wagner H.
中科院分区:
--
文献类型:
--
作者:
Stemmler T;Nikolay P;Nüttgens A;Skorupa J;Orlowski J;Wagner H.

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我们测试了仓鸮区分不同大小物体的能力。这种能力对于猫头鹰捕捉猎物来说可能很重要。我们在实验室进行了一项定量实验,并训练猫头鹰执行一项任务,其中猫头鹰必须区分计算机显示器上同时出现的两个菱形是否具有相同或不同的大小。我们获得了两只经验丰富的猫头鹰的完整数据集和第三只猫头鹰的一个数据点。对于远大于仓鸮空间分辨率的物体,角度阈值与物体大小相关,这意味着辨别遵循韦伯定律。我们确定的韦伯分数范围在 0.026 到 0.09 之间。对于接近空间分辨率的对象大小,性能会下降。我们对人类受试者进行了类似的实验。人类阈值对物体大小表现出同样的依赖性,尽管物体尺寸较小。人类表现导致韦伯分数范围从 0.025 延伸到 0.036。猫头鹰和人类之间的差异可以用人类比猫头鹰更高的空间敏锐度来解释。
We tested how well barn owls can discriminate objects of different sizes. This ability may be important for the owls when catching prey. We performed a quantitative experiment in the laboratory and trained owls in a task in which the owls had to discriminate whether two rhombi presented simultaneously on a computer monitor were of the same or of different sizes. We obtained full data sets with two experienced owls and one data point with a third owl. For objects being sufficiently larger than the spatial resolution of the barn owl, the angular threshold was related to object size, implying that the discrimination followed Weber’s law. The range of Weber fractions we determined was between 0.026 and 0.09. For object sizes close to the spatial resolution, performance degraded. We conducted similar experiments with human subjects. Human thresholds showed the same dependence on object size, albeit down to smaller object sizes. Human performance resulted in a range of Weber fractions extending from 0.025 to 0.036. The differences between owls and humans could be explained by the much higher spatial acuity of humans compared with owls.
谷仓猫头鹰 TYTO ALBA Guttata 对猎物大小的偏好和盈利能力
DOI: --
发表时间: 1991
期刊:
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