青海钩虾配合饲料对罗非鱼两品系生长效果的研究

Effect of Gammarus suifunensis on the Growth of Two Strains of Nilo Tilapia

研究青海钩虾对罗非鱼两品系吉富罗非鱼和彩虹鲷生长的促进作用。实验用青海钩虾与面粉、麸皮和豆饼制成 5组 ( ～ )配合饲料及良种场原用饲料 ( 组 )饲育吉富罗非鱼和彩虹鲷 ,经2 5 d试验结果表明 :( 1)彩虹鲷增重效果以 组饲料最高 ,平均增重为 4 4 .9g,较大于 组的 4 3.1g;( 2 )所有钩虾饲料对彩虹鲷的增色效果都高于良种场的原用饲料 组 ,其中以饲料 组最高 ;( 3)饲料 I组饲育吉富罗非鱼平均增重为 4 4 g,高于 组的 4 0 .1g;( 4 )吉富罗非鱼和彩虹鲷比较则显示出吉富罗非鱼的增重率明显高于彩虹鲷而饵料系数又较低的结果。

In this paper the effect of Gammarus suifunensis on the growth of two kinds of tilapia, i. e. rainbow tilapia and jifu tilapia is presented. Some tilapia were fed with five groups of meals(Ⅰ-Ⅴ) made of Gammarus suifunensis, grain flours, brans and bean cakes, while some were fed with compound feed(group Ⅵ) which had been used by the breeding farm. The 25-day test result shows that, (1) meal group Ⅱ shows the best effect on rainbow tilapia in terms of weight gaining(the average weight is 44.9g), better than that of group Ⅵ(43.1g); (2) the coloring effect of meals group Ⅰ-Ⅴ on rainbow tilapia is better than that of feed group Ⅵ, while the effect of group Ⅲ is the strongest; (3) jifu tilapia gains an average weight of 44g if fed with meal group Ⅰ, a better result than that of feed group Ⅵ (40.1g);(4) the meals have a better effect on jifu tilapia rather than on rainbow tilapia in terms of weight gaining, while the meal-weight ratio of jifu tilapia is lower than that of rainbow tilapia. =