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首页> 外文期刊>Scientific reports. >Inner Ear Otolith Asymmetry in Late-Larval Cichlid Fish ( Oreochromis mossambicus , Perciformes) Showing Kinetotic Behaviour Under Diminished Gravity
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Inner Ear Otolith Asymmetry in Late-Larval Cichlid Fish ( Oreochromis mossambicus , Perciformes) Showing Kinetotic Behaviour Under Diminished Gravity

机译：晚幼耳耳耳耳骨耳骨耳骨耳骨粉（Oreochromis mossambicus，Perciformes）显示重力下的动力学行为

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The inner ears of all vertebrates are designed to perceive auditory and vestibular inputs. Although a tremendous diversity in the inner ear can be found even among bony fishes, the morphologies of the utricle and of the semicircular canals are rather conservative among vertebrates. Fish show kinetoses under reduced gravity (spinning movements and looping responses) and are regarded model organisms concerning the performance of the otolithic organs. Otoliths can be analysed easily because they are compact, in contrast to the otoconial masses of other vertebrates. Here, late-larval Oreochromis mossambicus were subjected to 0.0001?×?g and 0.04?×?g aboard a sounding rocket, their behaviour was observed and morphometrical analyses on otoliths were carried out. Fish swimming kinetotically at 0.0001?×?g had a higher asymmetry of utricular otoliths (gravity perception) but not of saccular otoliths (hearing process) than specimens behaving normally at this gravity level (p?=?0.0055). Also, asymmetries of lapilli in animals swimming normally at 0.0001?×?g were lower than asymmetries in specimens swimming normally at 0.04?×?g (p?=?0.06). This supports the “otolith asymmetry hypothesis”, an explanation for the susceptibility to kinetosis, particularly concerning the utricular otoliths. It would be interesting to identify processes generating asymmetric otoliths, also in regard to human motion sickness.
机译：所有脊椎动物的内耳都设计用于感知听觉和前庭投入。虽然即使在骨鱼中也可以发现内耳的巨大多样性，但是脊椎动物中utricle和半圆形管的形态也是保守的。鱼在减轻重力（纺纱运动和循环响应）下进行动力学，并被认为是关于侧右转器官的性能的模型生物。与其他脊椎动物的单态肿块相比，它们可以轻松地分析右侧。在这里，晚幼虫肉瘤迁移率为0.0001Ω···克和0.04？×××××××××××××××××××××××××××g，它们的行为被观察到，并进行了对Otoliths上的形态学分析。鱼类游泳动力学在0.0001？×××g具有较高的左侧右侧（重力感知），但不是囊间右侧（听力过程），而不是在该重力水平处的样本（p？= 0.0055）。此外，兰布里的人类在通常为0.0001Ω····克的动物中的不对称，通常比通常为0.04××g（p≤x0.06）的标本中的不对称。这支持“otolith不对称假设”，解释对动力学的易感性，特别是关于尿合的偏乐力。识别产生不对称偏乐力的过程将是有趣的，也在人类晕车疾病方面。

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