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In Vivo Modeling of the Morbid Human Genome using Danio rerio
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Published on: August 24, 2013

河马中的岛屿矮体和Homo floresiensis中大脑大小缩小的模型

Eleanor M Weston1, Adrian M Lister

  • 1Department of Palaeontology, Natural History Museum, London SW7 5BD, UK. e.weston@nhm.ac.uk

Nature
|May 9, 2009
PubMed
概括

哺乳动物的岛屿矮体会导致大脑大小显著减少,这挑战了以前的预测. 这项对矮河马的研究表明,大脑尺寸的减少超过了身体尺寸缩放的预期.

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Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less likely to...