A comparative analysis of relative brain size in waterfowl (Anseriformes)
A comparative analysis of relative brain size in waterfowl (Anseriformes)
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DOI：
10.1159/000047228
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发表时间：
2001-02-01
影响因子：
1.7
通讯作者：
Nelson, JE
中科院分区：
文献类型：
--
作者：
Iwaniuk, AN;Nelson, JE
水禽（雁形目）的种类。使用传统的统计学和基于遗传学的比较方法，相对脑大小的变化程度和可能的关系与觅食和饮食模式进行了研究。研究结果表明，虽然脑的大小有很大的差异密切相关的水禽物种之间，它是不可靠的觅食模式或饮食。大脑大小与觅食模式和饮食之间缺乏关系的可能原因有很多。首先，觅食模式和饮食的细微变化可能有利于大脑大小的相对较大的变化。其次，觅食模式和饮食可能与单个大脑区域的扩张相关，而不会影响整体大脑大小。第三，其他行为/生态特征对于水禽的大脑大小进化可能更重要。例如，麝香鸭（Biziura lobata）的大脑相对较大，与其他硬尾鸭（Oxyura spp）相比，其幼鸭的高度表明发育速率在大脑大小的进化中起着重要作用。考虑到我们的结果之间的差异，在鸟类的大脑大小的阶间比较报告，需要进一步的研究到其他鸟类订单，以评估大脑的大小和行为可能是相关的订单内，以及它们之间。(C)2001 S. Karger AG，巴塞尔。
species of waterfowl (Anseriformes). Using both conventional statistics and phylogenetically based comparative methods, the extent of variation in relative brain size and possible relationships with mode of foraging and diet were examined. The results indicate that although brain size does vary considerably between closely related species of waterfowl, it is not reliably related to either foraging mode or diet. There are a number of possible reasons for the lack of relationships between brain size and foraging mode and diet. Firstly, subtle changes in foraging mode and diet may favor relatively large changes in brain size. Secondly, foraging mode and diet could be correlated with the expansion of an individual brain region without affecting overall brain size. Thirdly, other behavioral/ecological traits may be more important with respect to brain size evolution in waterfowl. For example, the relatively large brain of the musk duck (Biziura lobata) and altriciality of their young in comparison to other stiff-tailed ducks (Oxyura spp,) indicates that developmental rate plays a significant role in the evolution of brain size. Given the difference between our results and that reported in inter-order comparisons of brain size in birds, further research is required into other avian orders to assess how brain size and behavior might be related within orders as well as between them. (C) 2001 S. Karger AG, Basel.