网箱培育军曹鱼亲鱼及人工育苗研究  

Studies on breeding parent fish of Rachycentron canadum in netting tank and artificial seed breeding

作　　者：罗杰[1] 刘楚吾[1] 罗伟林 

机构地区：[1]湛江海洋大学水产学院,524025 [2]广州市水库移民办,510640

出　　处：《海洋水产研究》2005年第2期18-25,共8页Marine Fisheries Research

基　　金：广东省科技重大专项项目(A305020)资助

摘　　要：12月底从海上网箱挑选14尾1.5龄以上,健康、外表无伤的军曹鱼(Rachycentron canadum),移至陆地盖有顶棚的大水泥池进行强化培育.经过4个月左右的培养,结果显示,亲鱼在陆地强化培育比在海区网箱提前约7 d成熟并自然产卵.受精卵在室内育苗池进行人工育苗,在海水比重为1.020±0.5,pH 8.1～8.4,水温在27.0、29.2 ℃时,仔鱼孵出时间分别为26、 24 h,孵化率为88.8%～93.5%.孵出后的仔鱼在第7～9天为死亡高峰期,第11天左右的仔鱼体色有明显的变化,由棕红色变为黑色.经过1个月的培养,仔鱼的成活率约为9%.At the end of December, 14 uninjured Rachycentron canadum aging over 1.5 years, were selected and moved from the netting tanks in sea to big cement pools with covers on land, so that they were intensively cultured. About four months intensive culture, the Rachycentron canadum became mature and spawned naturally , about one week earlier than the fish cultured in the netting tanks of sea. In indoor nursing pools with seawater specific gravity of 1.020±0.5, pH from 8.1 to 8.4, 26 hours and 24 hours of hatching were required respectively when the water temperatures were 27.0℃ and 29.2℃. The hatching rate is from 88.8% to 93.5%. The fry suffered from a peak of death during 7 th to 9 th day and the color of fry changed from reddish brown to black obviously around the 11 th day.After one month’s culture, the result is that 150 000 Rachycentron canadum, with the length of 6.0 cm were produced and the survival rate was about 9%.

关 键 词：军曹鱼(Rachycentron canadurn) 自然产卵 人工育苗 

分 类 号：S967.3[农业科学—水产养殖] S965.399[农业科学—水产科学]