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首页> 外文期刊>Aquaculture Research >Nicotinic acid supplementation of diets for the African catfish, Clariasgariepinus (Burchell)
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Nicotinic acid supplementation of diets for the African catfish, Clariasgariepinus (Burchell)

机译：补充非洲Cl鱼Clariasgariepinus（Burchell）饮食中的烟酸

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Semi-purified diets containing 39% crude protein and 5% lipid were used to identify the qualitative requirement of African catfish, Clarias gariepinus (Burchell), for niacin and to characterize the pathologies associated with a deficiency of this vitamin, After 48 days of feeding, C. gariepinus supplied with the unsupplemented diet had developed severe deficiency symptoms and were subsequently withdrawn from the growth study. Niacin deficiency was characterized by feed refusal, listlessness, weight loss, poor feed utilization and high mortality. The skin overlaying the lateral line of the deficient fish became haemorrhagic and this clinical sign was accompanied by severe anaemia, After 126 days of feeding. fish fed diets containing 17.0 mg niacin kg(-1) had also developed a dermopathy, but without anaemia or high mortality. The feeding of diets containing less than 33.1 mg niacin kg(-1) resulted in suboptimal feed efficiency and poor protein utilisation. Allometric analysis of proximate composition indicated that carcass moisture, protein and ash were influenced by fish size, and not by dietary niacin content. However, significantly more lipid per unit of weight gain was deposited in the carcasses of fish fed the unsupplemented diet than in fish fed diets containing 17.0 mg kg(-1). The indicators used in the present study could not be applied to accurately determine a value for niacin requirement. However, until a more accurate assessment is performed, it is recommended that diets for C. gariepinus contain not less than 33.1 mg nicotinic acid kg(-1) feed.
机译：喂食48天后，使用含有39％粗蛋白和5％脂质的半纯化饲料来确定非洲cat鱼（Clarias gariepinus（Burchell））对烟酸的定性需求，并表征与该维生素缺乏有关的病理状况饮食补充不足的C. gariepinus出现严重的虚弱症状，随后从生长研究中退出。烟酸缺乏的特点是拒食，精神不振，体重减轻，饲料利用率差和死亡率高。进食126天后，覆盖缺损鱼侧线的皮肤出血，并且此临床症状伴有严重贫血。含有烟酸17.0毫克烟酸kg（-1）的日粮也出现皮肤病，但没有贫血或高死亡率。日粮中烟酸含量低于33.1 mg烟酸kg（-1）的饲料导致最佳的饲料效率和不良的蛋白质利用率。对附近成分的异速分析表明，car体的水分，蛋白质和灰分受鱼类大小的影响，而不受烟酸含量的影响。然而，饲喂未补充饮食的鱼的the体中沉积的单位脂肪的脂类比饲喂含有17.0 mg kg（-1）的鱼类的屠体中的脂类明显多。本研究中使用的指标无法应用于准确确定烟酸需求量的值。但是，在进行更准确的评估之前，建议加里皮梭菌的日粮中含有不少于33.1 mg烟酸kg（-1）饲料。

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