王辉,强俊,李瑞伟

• 1:广东海洋大学水产学院
• 2:广东茂名三高罗非鱼良种基地

摘要(Abstract)：

研究了温度22、25、28、31和34℃下奥尼罗非鱼(Oreochromis niloticus×O.aureus)仔稚鱼生长、饲料利用和消化酶活力。结果表明:1)不同温度对奥尼罗非鱼仔稚鱼生长有显著影响(P<0.05),温度为31℃时,仔稚鱼生长速度和绝对增重率最高,分别为0.08cm/d和0.035g/d;温度为22℃时最低,仅0.06cm/d和0.020g/d。2)饲料系数在28℃时最低,仅1.90;22和34℃时较高,达2.14和2.17,各组差异显著(P<0.05)。3)在仔稚鱼发育和存活率上,当温度在22～34℃时,温度越高,仔稚鱼发育越好;各组仔稚鱼的存活率介于93.7%～94.7%,差异不显著(P>0.05)。4)在消化酶活力上,胃蛋白酶、胰蛋白酶和淀粉酶活力随温度升高而升高,均在34℃时活力最高;脂肪酶活力在31℃时达到最高,22℃时活力最低。

关键词(KeyWords)： 奥尼罗非鱼(Oreochromis niloticus×O.aureus);仔鱼;稚鱼;温度;生长;饲料利用;消化酶

Abstract:

Keywords:

基金项目(Foundation): 广东省科技计划项目(2006B202230017)

作者(Author): 王辉,强俊,李瑞伟

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