花尾胡椒鲷幼鱼的生化组成和比能值

Biochemical composition and calorific value in juvenile Plectorhynchus cinctus

对在不同温度和摄食水平条件下饲养的花尾胡椒鲷 (Plectorhynchuscinctus)幼鱼的鱼体生化组成和比能值进行测定。结果表明 ,当实验温度为 2 8℃时 ,同一体重组鱼的含水量随摄食量的增加而减小 ,而干物质、脂肪含量和比能值则随摄食量的增加而增大。温度对饱食鱼的生化组分的影响不明显也不呈一定的规律性。鱼体蛋白质、脂肪、灰分含量及比能值与含水量间都存在负线性相关关系。

The juvenile Plectorhynchus cinctus, collected from Xiamen with body weight 0.3～92.0 g and total length 2.0～17.0 cm, were reared at different temperatures. Four body weight (BW) groups were designed, each at 2 or 5 ration levels and 4 water temperature levels (T w). Twenty days later the fishes were killed and analyzed. The results showed that in the same BW group and T w 28℃ the water content in fish body decreased with the increase of ration level and the contents of dry substances, lipids, ash and calorific value increased with the increase of ration level; the water temperatures had insignificant and irregular impact on the biochemical compositions of the sample fish; there existed negative and linear correlations between water content in body and other indexes including contents of protein, lipids, ash and calorific value, which provides an access for calculating those indexes from water content in fish body.