The trouble with flippers: a report on the prevalence of digital anomalies in Cetacea
The trouble with flippers: a report on the prevalence of digital anomalies in Cetacea
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鳍状肢的麻烦：关于鲸目动物数字异常流行的报告
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Susan D. Dawson
中科院分区：
文献类型：
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作者：
L. Cooper;Susan D. Dawson
鲸目动物(鲸鱼、海豚和江豚)的前肢在哺乳动物中是独一无二的，因为它们的脚趾显示出多指节，整个肢体被软组织鳍片包裹着，其功能是产生升力。鲸目动物手指的典型形态已被详细的解剖学研究很好地记录下来。然而，这项研究通过对鲸目动物数字异常进行分类上的广泛调查，进一步加深了我们对鲸目动物前肢解剖的理解。来自博物馆藏品的前肢X光片为我们计算鲸目动物数字异常的患病率和记录其形态提供了基础。结果表明，11%(n=255)的齿鲸表现出某种类型的异常骨化：大多数病例在一条指骨中融合了多种元素，而表现出分叉的指骨的病例很少见。一小部分须鲸X光照片样本(n=6)包含了灰鲸标本(Eschrichtius)中唯一有记录的须鲸多指症病例。此外，一些Balaenoptera标本在指间间隙内显示出僵化的元素，缺乏与相邻指骨和腕部的附着。此外，我们推测有几个基因可能在鲸目动物的数字异常中起到了作用。《伦敦林尼安学会》，《林尼安学会动物学杂志》，2009年，第155,722-735页。
The forelimbs of cetaceans (whales, dolphins, and porpoises) are unique among mammals as the digits exhibit hyperphalangy, and the entire limb is encased in a soft tissue flipper that functions to generate lift. The typical morphology of cetacean digits has been well documented by detailed anatomical studies. This study however furthers our understanding of cetacean forelimb anatomy by conducting a taxonomically broad survey of cetacean digital anomalies. Forelimb radiographs from museum collections provided the basis upon which we calculated the prevalence and documented the morphology of cetacean digital abnormalities. Results indicated that 11% (n = 255) of toothed whales displayed some type of aberrant ossification: the majority of these cases displayed a fusion of elements within a single digital ray, whereas cases exhibiting branched digits were rare. A small sample of baleen whale radiographs (n = 6) contained the only documented case of baleen whale polydactyly in a specimen of the gray whale (Eschrichtius). Furthermore, some Balaenoptera specimens displayed ossified elements within the interdigital spaces that lacked attachment to the adjacent digits and carpus. In addition, we speculated on the role that several genes may have played in creating cetacean digital anomalies. © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 155, 722‐735.