Kyphosis in reared sea bass (Dicentrarchus labrax L.):: ontogeny and effects on mortality
Kyphosis in reared sea bass (Dicentrarchus labrax L.):: ontogeny and effects on mortality
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DOI：
10.1016/s0044-8486(01)00821-3
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发表时间：
2002-06-28
期刊：
影响因子：
4.5
通讯作者：
Kentouri, M
中科院分区：
文献类型：
--
作者：
Koumoundouros, G;Maingot, E;Kentouri, M
描述了个体发育以及椎体后凸对饲养鲈鱼（Dicentrarchus labrax）死亡率的影响。第一个畸形证据是在总长 (TL) 为 10 毫米的个体中观察到的，表现为轻微畸形或个体椎骨双侧不对称。在平均 TL 14 毫米时，18.2% 的饲养鱼在前血管区域出现严重的椎体后凸。脊柱后凸继续发展，并在 17 mm TL 处出现其最大发生率 (24.8%)。畸形中心主要位于第5-6椎骨。脊柱后凸的标本表现出昏昏欲睡的行为。平均 TL 17 mm 后，由于受影响的鱼死亡率很高，畸形的发生率随着时间呈指数下降（幸存鱼的脊柱后凸发生率为 24.8%，从池中收集的死鱼为 52.6%，p < 0.01）。首次表明，尽管骨骼畸形对饲养的幼鱼的最终质量影响不大，但它会显着影响死亡率，从而影响孵化场的生产力。讨论了消除养殖鱼类骨骼畸形的病因、应用和研究目标等方面的结果。 (C) 2002 Elsevier Science B.V 保留所有权利。
The ontogeny and the effects of vertebral kyphosis on the mortality rate of reared sea bass (Dicentrarchus labrax) are described. The first evidence of deformities was observed in individuals of 10 mm total length (TL) in the form of light malformations or bilateral asymmetries of individual vertebrae. At 14 mm mean TL, the 18.2% of the reared fish presented severe vertebral kyphosis at the pre-haemal region. Kyphosis continued to develop and presented its maximum incidence at 17 mm TL (24.8%). The centre of the deformity was mainly located on vertebrae 5-6. Kyphotic specimens presented a lethargic behaviour. After 17 mm mean TL, the incidence of the deformity decreased exponentially over time due to the heavy mortality of the affected fish (24.8% kyphosis incidence in the surviving fish vs. 52.6% in the dead fish collected from the tank, p < 0.01). For the first time, it was shown that although a skeletal deformity could have little effect on the final quality of the reared juveniles, it can significantly affect the mortality rate and thus the productivity of the hatcheries. The results are discussed with respect to the aetiology, applications and research targets for the erasure of skeletal malformations from the reared fish. (C) 2002 Elsevier Science B.V All rights reserved.