摘要
对大黄鱼进行淡化养殖,首先将23日龄的大黄鱼苗种,从自然海水盐度28.46直接降至8.00,然后以2.00/d降盐幅度,再将盐度降至4.00,紧接着以1.00/d降盐幅度,继续将盐度降至2.00,最后以0.50/d的降盐幅度,将盐度降至0,经过4个月的纯淡水养殖,成活率为(59.02±6.01)%,显著高于其他的驯化方式(P<0.01);水温为23~29℃,淡水养殖成活率[(59.02±6.01)%^(90.74±1.09)%]显著高于海水养殖对照组的成活率[(30.33±6.17)%^(55.32±6.66)%](P<0.01);淡水养殖大黄鱼全长、体长和体质量特定生长率均值分别为(0.59±0.16)%/d、(0.70±0.22)%/d和(2.26±0.94)%/d,分别比海水养殖对照组高78.79%、52.17%和68.66%。
Juvenile large yellow croaker(Larimichthys crocea)was acclimatized and cultured in freshwater for 4months.The 23 day old large yellow croaker was directly acclimatized from seawater at a salinity of28.46 to 8.00,to a salinity of 4.00,then to a salinity of 2.00 at a rate of 1.00/d,and finally to freshwater by 0.50/d.The survival rate was found to be(59.02±6.01)%,very significantly higher than that in the other acclimatization patterns(P〈0.01).There was very significantly higher survival rate [(59.02±6.01)—(90.74±1.09)]% at water temperature of 23—29 ℃in freshwater aquaculture than that in the control group in the seawater[(30.33±6.17)—(55.32±6.66)]%(P〈0.01).The large yellow croaker farmed in the freshwater had 78.79% higher total length(0.59±0.16)%/d,52.17% higher body length(0.70±0.22)%/d,and 68.66% higher mean specific growth rate in body weight(2.26±0.94)%/d than those in the control group in the seawater.
出处
《水产科学》
CAS
CSCD
北大核心
2015年第5期327-330,共4页
Fisheries Science
基金
国家星火计划项目(S2013C400028)
宁德市渔业科技推广补助项目
关键词
大黄鱼
淡水养殖
成活率
特定生长率
Larimichthys crocea
freshwater culture
survival rate
specific growth rate