Mehlhorn Julia, Caspers Svenja
Institute for Anatomy I, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany.
Institute of Neuroscience and Medicine (INM-1), Research Center Jülich, Jülich, Germany.
Brain Behav Evol. 2020;95(6):287-301. doi: 10.1159/000516787. Epub 2021 May 27.
The avian class is characterized by particularly strong variability in their domesticated species. With more than 250 breeds and highly efficient commercial lines, domestic chickens represent the outcome of a really long period of artificial selection. One characteristic of domestication is the alterations in brain size and brain composition. The influence of domestication on brain morphology has been reviewed in the past, but mostly with a focus on mammals. Studies on avian species have seldom been taken into account. In this review, we would like to give an overview about the changes and variations in (brain) morphology and behavior in the domestic chicken, taking into consideration the constraints of evolutionary theory and the sense or nonsense of excessive artificial selection.
鸟类的特点是其驯化物种具有特别强的变异性。家鸡有250多个品种和高效的商业品系，代表了很长一段时间人工选择的结果。驯化的一个特征是大脑大小和大脑组成的改变。过去已经对驯化对大脑形态的影响进行了综述，但大多集中在哺乳动物上。对鸟类物种的研究很少被考虑在内。在这篇综述中，我们将概述家鸡（大脑）形态和行为的变化与差异，同时考虑进化理论的限制以及过度人工选择的合理性或不合理性。
