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Abstract Juvenile large yellow croaker (L arimichthys crocea) was acclimatized and cultured in freshwater for 4 months .The 23 day old large yellow croaker was directly acclimatized from seawater at a salinity of 28 .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 .
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Received: 25 May 2015
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