Davis S J, Fischer G J
Anim Behav. 1978 Feb;26(1):259-64. doi: 10.1016/0003-3472(78)90026-x.
Colour approach preferences in 1-day-old New Hampshire and White Leghorn chicks were assessed by choice preference tests between pairs of differently coloured floors, illuminated by light passed through different interference filters and adjusted to equal luminance. In experiment 1, the preferences found closely resembled colour pecking preferences reported previously for domestic chicks, e.g. a preference for blue over green. Experiment 2 showed that the latter preference could be reversed by cold stress. That is, chicks tested similarly but in a cold noisy room (18.9 C) preferred green over blue. Experiment 3 eliminated the role of noise in this reversal effect, since chicks tested in a warm noisy room showed the normal blue over green preference. It was concluded, in disagreement with prior findings and their interpretations, that chick colour pecking and approach preferences are normally the same, not different, and certainly not spectral mirror-image reversals. Instead, a more restricted preference reversal (i.e. in the blue-green spectral regions) occurs as a result of cold stress.
通过在不同颜色地板对之间进行选择偏好测试，评估1日龄新罕布什尔鸡和白来航鸡雏鸡的颜色接近偏好。这些地板由透过不同干涉滤光片的光照明，并调整至相同亮度。在实验1中，所发现的偏好与先前报道的家鸡的颜色啄食偏好非常相似，例如对蓝色的偏好超过绿色。实验2表明，后一种偏好可因冷应激而逆转。也就是说，在寒冷嘈杂的房间（18.9摄氏度）中以类似方式测试的雏鸡更喜欢绿色而非蓝色。实验3排除了噪音在这种逆转效应中的作用，因为在温暖嘈杂的房间中测试的雏鸡表现出正常的对蓝色超过绿色的偏好。得出的结论与先前的发现及其解释不同，即雏鸡的颜色啄食和接近偏好通常是相同的，而非不同，当然也不是光谱镜像反转。相反，由于冷应激会出现更有限的偏好逆转（即在蓝绿色光谱区域）。
