Growth, development, and skin abnormalities of halibut (Hippoglossus hippoglossus L.) juveniles kept on different bottom substrates
Growth, development, and skin abnormalities of halibut (Hippoglossus hippoglossus L.) juveniles kept on different bottom substrates
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DOI：
10.1016/s0044-8486(96)01359-2
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发表时间：
1996-10
期刊：
影响因子：
4.5
通讯作者：
O. Ottesen;H. Strand
中科院分区：
文献类型：
--
作者：
O. Ottesen;H. Strand
大西洋比目鱼（Hippoglossus hippoglossus L.）幼鱼在光滑PVC底基、光滑PVC上的硅脊或光滑PVC上的沙层的单元中饲养6个月。死亡率最高的比目鱼饲养在单位与底部基板的沙子。这可能是由于该系统的水质较差。生长率最高的大比目鱼饲养单位与硅脊。3个月后，在具有光滑底部的单元中饲养的青少年在尾柄和背眼侧的身体中部区域上出现了外部皮肤损伤。同时有色素沉着的外缘的身体和头部地区的反眼侧。随着时间的推移，外部皮肤病变和色素沉着斑块的大小和数量增加。到实验结束时，大比目鱼的数量与外部皮肤病变和色素沉着的abocular侧显着较高的鱼之间举行的单位与一个光滑的底部比在其他两个系统中饲养。外部皮肤病变和色素沉着与生长减少的巧合表明，这些皮肤问题对大比目鱼的生长速度有负面影响。
Atlantic halibut (Hippoglossus hippoglossus L.) juveniles were reared for 6 months in units with bottom substrates of smooth PVC, silicone ridges on smooth PVC, or a layer of sand lying over smooth PVC. Mortality was highest among the halibut reared in units with a bottom substrate of sand. This may be attributed to poor water quality in this system. Growth rates were highest for the halibut reared in units with silicone ridges. After 3 months the juveniles reared in units with a smooth bottom had developed external skin lesions on the caudal peduncle and on the mid-body area of the abocular side. Simultaneously there was hyperpigmentation of the outer margins of the body and head region on the abocular side. The external skin lesions and patches of hyperpigmentation increased in size and number as time progressed. By the end of the experiment the numbers of halibut with external skin lesions and hyperpigmentation of the abocular side were significantly higher amongst fish held in the units with a smooth bottom than amongst those reared in the other two systems. The coincidence of external skin lesions and hyperpigmentation with reduced growth suggests a negative effect of these skin problems on growth rates in halibut.