养殖密度、水质和分级对水泥池鱖鱼苗种培育的影响

Guangdong Agricultural Sciences(2015)

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Abstract
为研究养殖密度、水质和分级对水泥池鱖苗种培育的影响,以翘嘴鳜鱼苗(体长0.7~1 cm)为对象,在不同密度下投喂麦瑞加拉鲮进行试验.结果表明:(1)小规格苗种(< 2.5 cm)的放养密度宜在4 000尾/m3左右,大规格苗种(2.5~6.5 cm)的放养密度不宜超过800尾/m3.(2)养殖水体中氨氮和亚硝酸盐的浓度均与鳜鱼苗养殖密度成显著正相关,水泥池中进行鳜鱼苗种培育不宜密度过高,密度越高,疾病暴发的风险越大.(3)分级过筛选取鳜苗体长为2~3、5~6、8~9 cm时的3个节点进行,保持饱食投喂,能较好地提高鳜鱼苗种的整齐度,降低残食率,提高成活率.
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Key words
densitywater quality,multi-stage
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