Ishak Sairatul Dahlianis, Kamarudin Mohd Salleh, Ramezani-Fard Ehsan, Saad Che Roos, Yusof Yus Aniza
J Environ Biol. 2016 Jul;37(4 Spec No):755-64.
We investigated the effects of four iso-nitrogenous (40% crude protein) and iso-caloric (17.6 kJ g(-1)) diets with different dietary carbohydrate levels (15%, 20%, 25% and 30%) on the growth performance, feed utilization efficiency, body composition and liver histology of Malaysian mahseer (Tor tambroides) fingerlings in a 10-week feeding trial. Fish (initial weight of 0.8?0.1 g; initial total length 4.2?0.1 cm) were fed twice daily at 4% body mass. Dietary carbohydrate level had significant effects (P<0.05) on weight gain, SGR (specific growth rate), FCR (feed conversion rate), PER (protein efficiency rate), survival percentage and all nutrient retention values (PRV, LRV, CRV, ERV). Protein, carbohydrate and gross energy composition of the fish body were also significantly differed (P<0.05) among treatments. Liver histology showed mild hepatic steatosis and hypertrophy for fishes receiving a higher dietary carbohydrate inclusion. In general, treatments with 20% and 25% dietary carbohydrate levels produced better growth results compared to the rest of the treatments. Using a second-order polynomial regression analysis model, the optimal dietary carbohydrate level of 23.4% was estimated for mahseer fingerlings. ?
在一项为期10周的饲养试验中，我们研究了四种等氮（粗蛋白含量40%）和等热量（17.6 kJ g(-1)）且碳水化合物水平不同（15%、20%、25%和30%）的饲料对马来西亚马西亚胡鲇（Tor tambroides）幼鱼生长性能、饲料利用效率、鱼体组成和肝脏组织学的影响。鱼（初始体重0.8±0.1 g；初始全长4.2±0.1 cm）每天按鱼体质量的4%投喂两次。饲料碳水化合物水平对增重、特定生长率（SGR）、饲料转化率（FCR）、蛋白质效率（PER）、成活率以及所有营养物质保留率（PRV、LRV、CRV、ERV）均有显著影响（P<0.05）。各处理组鱼体的蛋白质、碳水化合物和总能组成也存在显著差异（P<0.05）。肝脏组织学显示，摄入较高饲料碳水化合物含量的鱼出现轻度肝脂肪变性和肥大。总体而言，与其他处理组相比，饲料碳水化合物水平为20%和25%的处理组生长效果更好。通过二阶多项式回归分析模型，估算出马西亚胡鲇幼鱼的最佳饲料碳水化合物水平为23.4%。
