Department of fisheries, Faculty of animal sciences and fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
J Anim Physiol Anim Nutr (Berl). 2013 Jun;97(3):485-94. doi: 10.1111/j.1439-0396.2012.01289.x. Epub 2012 Apr 5.
This study tried to determine the protein and energy requirements of growing beluga sturgeon Huso huso using a factorial approach. The experiment was composed of four small-scale growth trails covering different weight ranges. The fish fed at 0, 20, 40, 60, 80 and 100% of satiation. DWG had a steady increase throughout the experiment following a non-linear equation as Y = 1.433 (±0.056) × Ln(X) -2.740 (±0.261); r(2) = 0.99, p < 0.001, where Y = weight gain (g/day) and X = fish weight (g). The daily requirement of digestible energy (DE) for maintenance amounted to 79.09 kJ × BW (kg)(0.8) . The daily requirement of DP for maintenance calculated as 0.93 g × BW (kg)(0.7) . The relationship between DE intake (X) and DE gain (Y) expressed as Y = -0.0004 (±0.000) X(2) + 0.600 (±0.082) X -44.95 (± 6.72). Also, the relationship between DP intake (X) and protein gain (Y) was expressed as Y = -0.019 (±0.006) X(2) + 0.548 (±0.062) X - 0.498 (±0.121). The daily requirements of energy and protein were estimated as 79.09 kJ × BW (kg)(0.8) + 2.94 × DE gain and 0.93 g × BW (kg)(0.7) + 2.63 × DP gain. Apparently, beluga sturgeon is inefficient in converting energy and protein into body tissue. Therefore, energy content of the diet should be sufficiently high to satisfy large energy demands in beluga sturgeon and also to reduce the catabolism of protein.
本研究采用析因法来确定幼龄白鲟（Huso huso）的蛋白质和能量需求。实验由四个涵盖不同体重范围的小型生长试验组成。鱼的投喂量分别为饱食量的 0%、20%、40%、60%、80%和 100%。DWG 随着时间的推移呈非线性增加，其拟合方程为 Y=1.433(±0.056)×Ln(X)-2.740(±0.261)；r²=0.99，p<0.001，其中 Y 为日增重（g/d），X 为鱼体重（g）。维持所需的可消化能量（DE）的日需求量为 79.09 kJ×BW(kg)(0.8)。维持所需的可消化蛋白（DP）的日需求量计算为 0.93 g×BW (kg)(0.7)。DE 摄入量（X）与 DE 增重（Y）之间的关系表示为 Y=-0.0004(±0.000) X(2)+0.600(±0.082) X-44.95(±6.72)。此外，DP 摄入量（X）与蛋白质增重（Y）之间的关系表示为 Y=-0.019(±0.006) X(2)+0.548(±0.062) X-0.498(±0.121)。能量和蛋白质的日需求量估计为 79.09 kJ×BW (kg)(0.8)+2.94×DE 增重和 0.93 g×BW (kg)(0.7)+2.63×DP 增重。显然，白鲟在将能量和蛋白质转化为身体组织方面效率低下。因此，饮食中的能量含量应该足够高，以满足白鲟的高能量需求，并减少蛋白质的分解代谢。
