Walk with the fishes

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Walk with the fishes

机译：与鱼同行

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Bichirs (genus Polypterus) are primitive ray-finned fish with lungs and powerful pectoral fins that provide support during occasional forays ashore. This study takes Polypterus senegalus as a model for the immediate ancestors of tetrapods and quantifies changes that occur when these fish are 'terrestrialized'. When raised on land, bichirs lift their heads higher off the ground, deploy their forelimbs closer to the midline and slip about less often than those raised underwater and deposited ashore for the first time. These observations, together with changes in bone and muscle structure, suggest that some of the postural changes seen in the earliest tetrapods, or rather their immediate antecedents, might have been made in response to the environment and assimilated by developmental plasticity.

机译：Bichirs（Polypterus属）是原始的带鳍鱼，具有肺和强大的胸鳍，在偶尔上岸袭击时提供支持。这项研究将塞内加尔息肉（Polypterus senegalus）作为四足动物的直接祖先的模型，并量化了这些鱼“陆生化”时发生的变化。当在陆地上抬起时，双足动物的头抬离地面更高，将前肢展开到中线附近，并且滑行的频率比第一次在水下抬高并沉积在岸上的频率低。这些观察结果以及骨骼和肌肉结构的变化表明，最早的四足动物（或者说它们的前身）中看到的某些姿势变化可能是对环境做出的响应，并且被发育可塑性所吸收。

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《Nature》 |2014年第7515期|373-373|共1页
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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Walk with the fishes

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