| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1073/pnas.1401392111 |
| 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 JAJ; ten Broek CMA | |
| 发表日期 | 2014 |
| 出处 | Proceedings of the National Academy of Sciences 111 (31): 11401-11406 |
| 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. However, in many taxa, the number of trunk vertebrae is surprisingly constant. We argue that this constancy results from strong selection against initial changes of these numbers in fast running and agile mammals, whereas 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 toward such transformations generally produce transitional lumbosacral vertebrae that are incompletely fused to the sacrum. We hypothesize that such incomplete homeotic transformations impair flexibility 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 count 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 Locomotion Eco-Evo-Devo Musculoskeletal system |
| URL | http://pure.iiasa.ac.at/id/eprint/10868/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/129906 |
| 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 | ||
| Fast%20running%20res（1584KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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