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首页> 外文期刊>African Journal of Biotechnology >Growth, feed efficiency and carcass mineral composition of Heterobranchus longifilis, Oreochromis niloticus and Sarotherodon melanotheron juveniles fed different dietary levels of soybean meal-based diets.
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Growth, feed efficiency and carcass mineral composition of Heterobranchus longifilis, Oreochromis niloticus and Sarotherodon melanotheron juveniles fed different dietary levels of soybean meal-based diets.

机译：饲喂不同饮食水平的豆粕型日粮的长杂种，尼罗罗非鱼和黑腹线虫的生长，饲料效率和car体矿物组成。

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摘要

The effects of substitution dietary fish protein by soybean protein on growth, survival, biochemical composition and mineral composition of juvenileHeterobranchus longifilis,?Sarotherodon melanotheron?and?Oreochromis niloticuswere evaluated. Three diets were formulated to be isonitrogenous (35% crude protein) by substituting fish meal for soybean meal at levels of 0 (FM), 25 (SBM25) and 50% (SBM50).?Diets were fed to triplicate groups of each species?at ratio of 5% body weight. At the end of the study period, final body weight (FBW), final body length (FBL), specific growth rate (SGR) and protein efficiency ratio (PER) decreased with an?increasing dietary soybean protein level in?H. longifilis. Survival rate (SR) was 1.5 times lower in juvenile catfish fed SBM50 (29.3%) than FM- and SBM25-fed fish (44%).?S. melanotheron?fed all three diets had no significant difference in?FBW, FBL, SGR, SR, FCR, PER or production time. In?O. niloticus, SR, FCR and PER were not affected by dietary protein substitution level. However, FBW, FBL and SGR?increased with an increasing dietary soybean protein level. The production time generally showed a decline at lower protein substitution levels. The production cost was significantly lower in fish fed SBM50. Proximate composition analysis indicated that the carcass moisture in the three species and carcass protein content in?H. longifilis?and?O. niloticus?were not affected by dietary protein source. In?S. melanotheron, carcass protein content showed a decline in fish fed SBM50. Carcass lipid, ash and gross energy levels in these species were also significantly affected by dietary protein sources.?Carcass calcium and phosphorus concentrations in fish were significantly reduced with a high inclusion of dietary soybean meal. The results of this study indicated?that fish meal can be replaced with soybean meal up to 50% level in diets for Tilapia?S. melanotheronwithout adverse effects on growth, nutrient utilization or nitrogen balance.
机译：评估了用大豆蛋白替代鱼粉对鱼类的生长，存活，生化成分，矿化成分，杂种长颈鹿（Sarotherodon melanotheron）和尼罗罗非鱼（Oreochromis niloticus）的影响。用鱼粉代替大豆粉，分别以0（FM），25（SBM25）和50％（SBM50）的含量将三种日粮制成等氮（粗蛋白35％）饲料。体重比例为5％。在研究结束时，最终体重（FBW），最终体重（FBL），比生长速率（SGR）和蛋白质效率比（PER）随着日粮中大豆蛋白水平的增加而降低。长寿。饲喂SBM50的ju鱼（29.3％）的存活率（SR）比FM和SBM25饲喂的鱼（44％）低1.5倍。用黑色素喂养的三种饮食在FBW，FBL，SGR，SR，FCR，PER或生产时间方面无显着差异。在吗尼罗罗非鱼，SR，FCR和PER不受饮食蛋白质替代水平的影响。但是，FBW，FBL和SGR？随着日粮大豆蛋白水平的增加而增加。生产时间通常在较低的蛋白质取代水平下显示下降。用鱼喂养的SBM50的生产成本大大降低。最近的成分分析表明，三种species体的水分和ΔH中的protein体蛋白质含量。长寿和？尼罗罗非鱼不受饮食蛋白质来源的影响。在？黑色素，,体蛋白质含量显示鱼饲喂的SBM50下降。这些蛋白质的体脂质，灰分和总能量水平也受到饮食蛋白质来源的显着影响。•高含量饮食大豆粉可显着降低鱼的cas体钙和磷浓度。这项研究的结果表明，在罗非鱼中，鱼粉可以被大豆粉替代，其含量最高可达50％。黑色素对生长，养分利用或氮平衡无不利影响。

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