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首页> 外文期刊>Comparative Medicine >The Effect of Otolith Malformation on Behavior and Cortisol Levels in Juvenile Red Drum Fish (Sciaenops ocellatus)
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The Effect of Otolith Malformation on Behavior and Cortisol Levels in Juvenile Red Drum Fish (Sciaenops ocellatus)

机译：耳石畸形对幼年红鼓鱼（Sciaenops ocellatus）行为和皮质醇水平的影响

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摘要

Captive-raised red drum fish were observed with phenotypic abnormalities, including deformities of the spine, jaw, and cephalic region, that were consistent with vitamin C deficiency during the larval stage. In light of their visible exterior skeletal abnormalities, we suspected that the affected fish would also have abnormal otoliths. Otoliths are dense calcareous structures that function in fish hearing. We hypothesized that abnormal fish would have irregular otoliths that would alter behavior and cortisol levels as compared with those of phenotypically normal fish. The normal and abnormal fish had statistically significant differences in behavior, cortisol levels, and otolith volume and density. MicroCT assessment of abnormal fish revealed operculum abnormalities, malocclusions, and several types of otolith malformations. Therefore, the affected fish had not only an abnormal skeletal appearance but also significantly abnormal behavior and cortisol responses.
机译：圈养的红鼓鱼的表型异常，包括脊柱，下颌和头颅区域的畸形，与幼体期维生素C缺乏症相一致。鉴于它们可见的外部骨骼异常，我们怀疑受影响的鱼也会有耳石。耳石是致密的钙质结构，在鱼的听力中起作用。我们假设与表型正常的鱼类相比，异常鱼类将具有不规则的耳石，这些耳石会改变行为和皮质醇水平。正常和异常鱼的行为，皮质醇水平以及耳石的体积和密度在统计学上具有显着差异。 MicroCT对异常鱼类的评估显示盖异常，错牙合畸形和几种耳石畸形。因此，受感染的鱼不仅具有异常的骨骼外观，而且具有明显的异常行为和皮质醇反应。

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