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OALib Journal期刊
ISSN: 2333-9721
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投喂频率和饵料种类对黄颡鱼仔稚鱼生长和存活的影响
DOI: 10.3724/SP.J.1145.2009.00078, PP. 78-81
Keywords: 投喂频率,饵料,生长,存活,仔稚鱼,黄颡鱼
Abstract:
研究了以浮游动物为饵料日饱食投喂3次(f3)、2次(f2)、1次(f1)等不同投喂频率对3~32日龄黄颡鱼仔稚鱼生长和存活的影响，并比较了单独投喂浮游动物(ⅰ组)、水蚯蚓(ⅱ组)及两者混合投喂(ⅲ组)对4~34日龄黄颡鱼生长和存活的影响.结果表明：(1)投喂频率对黄颡鱼仔稚鱼生长具有显著影响，f3组个体平均全长、体重显著高于f2、f1组；3~29日龄全长和体重特定生长率(sgr)与投喂频率间直线正相关(sgrl=1.0366d+3.2347,r2=0.9025;sgrw=3.0013d+9.4829,r2=0.8833)，投喂越多则生长越快.(2)17~25日龄时ⅱ组生长显著低于ⅰ、ⅲ组；28日龄ⅱ组生长仍显著低于ⅲ组，但与ⅰ组间没有显著差异；到34日龄，ⅲ组生长最快，ⅱ组生长超过ⅰ组，3组间生长差异显著(p<0.05)，表明28日龄后水蚯蚓为黄颡鱼更合适的饵料.(3)饵料种类对34日龄内的仔稚鱼成活率没有影响.试验表明，日饱食3次更有利于黄颡鱼仔稚鱼的生长；28日龄后投喂饵料应增加水蚯蚓；充足的适口饵料是影响黄颡鱼苗种生长的重要因素.图2表2参18
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