| 来源类型 | Monograph (IIASA Interim Report) |
| 规范类型 | 报告 |
| Fast running restricts evolutionary change of the vertebral column in mammals. | |
| Galis F; Carrier DR; van Alphen J; van der Mije SD; Van Dooren TJM; Metz HJAJ; ten Broek CMA | |
| 发表日期 | 2014 |
| 出版者 | IIASA, Laxenburg, Austria: IR-14-029 |
| 出版年 | 2014 |
| 语种 | 英语 |
| 摘要 | The mammalian vertebral column is highly variable, reflecting adaptations to a wide range of lifestyles, from burrowing in moles to flying in bats. Yet, in many taxa the number of trunk vertebrae is surprisingly constant. We argue that the latter constancy result from strong selection against initial changes of thse numbers in fast-running or agile mammals, while such selection is weak in slower-running, sturdier mammals. The rationale is that changes of the number of trunk vertebrae require homeotic transformations from trunk into sacral vertebrae, or vice versa, and mutations outwards such transformations generally produce transitional lumbosacral vertebrae that are incompletely fused to the sacrum. We hypothesize that such incomplete homeotic transformations impair flaxibility of the lumbosacral joint and, thereby threaten survival in species that depend on axial mobility for speed and agility. Such transformations will only marginally affect performance in slow sturdy species, so that sufficient individuals with transitional vertebrae survive to allow eventual evolutionary changes of trunk vertebral numbers. We present data on fast and slow carnivores and artiodactyls and on slow afrotherians and monotremes that strongly support this hypothesis. The conclusion is that the selective constraints on the number of trunk vertebrae stem from a combination of developmental and biomechanical constraints. |
| 主题 | Evolution and Ecology (EEP) |
| 关键词 | body plans evolutionary conservation stabilizing selection homeotic transformations mammals mammals locomotion |
| URL | http://pure.iiasa.ac.at/id/eprint/11242/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/125987 |
| 推荐引用方式 GB/T 7714 | Galis F,Carrier DR,van Alphen J,et al. Fast running restricts evolutionary change of the vertebral column in mammals.. 2014. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| IR-14-029.pdf（8473KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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