Colour preferences and colour vision in poultry chicks
Colour preferences and colour vision in poultry chicks
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DOI：
10.1098/rspb.2007.0538
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发表时间：
2007-08-22
影响因子：
4.7
通讯作者：
Osorio, D.
中科院分区：
文献类型：
--
作者：
Ham, A. D.;Osorio, D.
生物交流信号中引人注目的颜色引发了关于动物如何感知超阈值颜色差异的问题，以及关于非人类物种的颜色偏好和颜色分类的长期问题。本研究调查了觅食雏鸡（Gallus Gallus）在啄有色物体时的偏好。色彩识别的研究通常涉及对单色光的反应以及动物如何划分光谱。我们使用互补色，中间色为灰色，并将小鸡的选择与可能影响吸引力的三种因素模型联系起来。两个模型假设吸引力是由基于颜色歧视阈值的度量来决定的，或者(i)通过背景的颜色对比，或者（ii）相对于内部标准。第三种可选模型是分类很重要。我们用四对（鸟类）互补色测试了刚孵出的和9天大的小鸡，对人类来说是橙色、蓝色、红色和绿色。与9天大的鸟相比，颜色对比与刚孵出的小鸡更相关，但在这两种情况下，对比都不能单独解释偏好；尤其是橙色比蓝色。对于年龄较大的雏鸟，有证据表明它们有互补色的分类，以灰色为边界。
The dramatic colours of biological communication signals raise questions about how animals perceive suprathreshold colour differences, and there are long-standing questions about colour preferences and colour categorization by non-human species. This study investigates preferences of foraging poultry chicks (Gallus gallus) as they peck at coloured objects. Work on colour recognition often deals with responses to monochromatic lights and how animals divide the spectrum. We used complementary colours, where the intermediate is grey, and related the chicks' choices to three models of the factors that may affect the attractiveness. Two models assume that attractiveness is determined by a metric based on the colour discrimination threshold either (i) by chromatic contrast against the background or (ii) relative to an internal standard. An alternative third model is that categorization is important. We tested newly hatched and 9-day-old chicks with four pairs of ( avian) complementary colours, which were orange, blue, red and green for humans. Chromatic contrast was more relevant to newly hatched chicks than to 9-day-old birds, but in neither case could contrast alone account for preferences; especially for orange over blue. For older chicks, there is evidence for categorization of complementary colours, with a boundary at grey.