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为讨论尼罗罗非鱼(Oreochromis niloticus)幼鱼的鱼体化学成分和能量密度随饥饿时间延长的变化规律,2010年1月采集初始体质量为(3.61±0.13)g的尼罗罗非鱼幼鱼40尾,以饥饿处理0 d为对照,将饥饿处理8、15、22和45 d分为4个组,分别测定所有材料的鱼体化学成分,估算了能量密度。结果表明,随饥饿时间(t)天数的延长,尼罗罗非鱼幼鱼的蛋白质含量(PRO)、脂肪含量(FAT)和能量密度(E)降低,可以分别描述为方程PRO=14.727e-0.006 5 t(r2=0.707,n=37,p<0.05)、FAT=2.295 5e-0.036 6 t(r2=0.552,n=37,p<0.05)和E=4.478 1e-0.011 3 t(r2=0.694,n=37,p<0.05);随饥饿时间(t)天数的延长,含水量(WAT)和灰分含量(ASH)升高,可以分别描述为方程WAT=76.1969 e0.001 3 t(r2=0.566,n=37,p<0.05)和ASH=4.467 8 e0.008 3 t(r2=0.729,n=37,p<0.01);PRO、FAT和E均分别与WAT呈显著的负线性关系,可以分别描述为方程PRO=61.969 9-0.625 1WAT(r2=0.740,n=37,p<0.05)、FAT=47.908 8-0.593 8 WAT(r2=0.899,n=37,p<0.05)和E=33.548 9-0.382 1 WAT(r2=0.955,n=37,p<0.05)。研究认为该种鱼在饥饿初期大量消耗脂肪,并随着饥饿时间的延长,净耗量逐渐减少,同时在整个饥饿过程消耗蛋白质。
In order to discuss the changes of the chemical composition and energy density of fish in the Oreochromis niloticus with the increase of the time of hunger, in January 2010, the initial body weight of Nile tilapia (3.61 ± 0.13 g) The fish 40 were treated with starvation for 0 d as a control, and starved for 8, 15, 22 and 45 days were divided into 4 groups. The chemical composition of all the fish were determined and the energy density was estimated. The results showed that the protein content (PRO), fat content (FAT) and energy density (E) of juvenile Nile tilapia decreased with the number of days of starvation (t), which could be described as the equation PRO = 14.727e- 0.006 5 t (r2 = 0.707, n = 37, p <0.05), FAT = 2.295 5e-0.036 6 t (r2 = 0.552, n = 37, p <0.05) and E = 4.478 1e-0.011 3 t 0.694, n = 37, p <0.05). WAT and ASH increased with the number of days of starvation (t), which could be described as the equation WAT = 76.1969 e0.001 3 t (r2 = 0.566, n = 37, p <0.05) and ASH = 4.467 8 e0.008 3 t (r2 = 0.729, n = 37, p <0.01); PRO, FAT and E were significantly negatively correlated with WAT , Can be described as equation PRO = 61.969 9-0.625 1WAT (r2 = 0.740, n = 37, p <0.05), FAT = 47.908 8-0.593 8 WAT (r2 = 0.899, n = 37, p <0.05) and E = 33.548 9-0.382 1 WAT (r2 = 0.955, n = 37, p <0.05). Studies suggest that the fish consume large amounts of fat during the initial hunger period and, as starvation times are prolonged, reduce net consumption while consuming protein throughout the course of starvation.