Fearfulness in red junglefowl and domesticated White Leghorn chickens
Fearfulness in red junglefowl and domesticated White Leghorn chickens
复制标题
DOI：
10.1016/j.beproc.2008.12.018
复制
发表时间：
2009-05-01
影响因子：
1.3
通讯作者：
Jensen, Per
中科院分区：
文献类型：
--
作者：
Campler, Magnus;Jongren, Markus;Jensen, Per
可以假设，减少恐惧是驯化过程中选择的主要目标。我们测试了20个驯化的白色来航鸡（WL）和它们的祖先，红原鸡（RJF），在四个不同的恐惧测试（开放领域，新的对象。空中捕食者，和人类的恐惧）。这些测试旨在测量对不同类型的潜在恐惧刺激的反应。用主成分分析（PCA）分析了来自每个测试的相同四个变量（站/坐警觉、运动、飞/跳和发声）的持续时间之间的相关性。在主成分分析中，33.5%的反应变化是由一个单一的因素解释的，解释为一般的恐惧因素。这方面的得分越高，恐惧反应越强。红色原鸡在这个因素上的得分明显高于白色来航鸡，并且在人类恐惧测试中也有更长的潜伏期，在相同的测试中用作恐惧的独立测量。结果表明，选择低恐惧一直是驯化的一个重要因素。(C)2009爱思唯尔有限公司版权所有。
It may be hypothesised that reduced fearfulness has been a major target of selection during domestication. We tested 20 domesticated White Leghorn (WL) chickens and their ancestors, red junglefowl (RJF), in four different fear tests (Open Field, Novel Object. Aerial Predator, and Fear for Humans). The tests were designed to measure reactions to different types of potentially fearful stimuli. The correlations between durations of the same four variables from each of the tests (Stand/sit alert, Locomotion, Fly/jump, and Vocalisation) were analysed with principal components analysis (PCA). In the PCA, 33.5% of the variation in responses was explained by a single factor, interpreted as a general fear factor. Higher scores on this were related to stronger fear reactions. Red jungle fowl scored significantly higher than White Leghorns wet on this factor, and also had a longer latency to feed in the Fear of Humans-test, used as an independent measure of fear in the same tests. The results suggest that selection for low fearfulness has been an important element of domestication. (C) 2009 Elsevier B.V. All rights reserved.