The effect of salinity on the survival and growth of the laboratory reared larvae of Macrobrachium rosenbergii de Man

S.R.S. Nair, U. Goswami, S.C. Goswami

Abstract



Three sets of experiments were conducted to determine the optimum salinity and the effect of its sudden increase or decrease on the survival and growth of the larvae of Macrobrachium rosenbergii. In the first experiment, larvae were transferred to salinities ranging from 5 to 35 ppt after prior acclimatization in each range. In the second experiment, the larvae were transferred suddenly to each salinity and in the last experiment, the larvae were acclimatized to a salinity of 20 ppt and then suddenly transferred to lower salinities (0 to 15 ppt). It was noticed that salinity had a marked influence on the survival and growth of the early larval stages of M. rosenbergii and that 15 ppt was the optimum salinity at which maximum growth and survival occurred. A sudden increase or decrease to the extreme high or low salinities has an adverse effect on survival and growth

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