Author(s): Abhaya Kumar Mohanty, Swati Sucharita Mohanty and Debansu Sekhar Pramanik

Abstract: Present study was carried out to observe the effect of various ranges of temperature (25 ^oC, 31 ^oC and 35 ^oC) and salinity (6, 9, 12, 15, 18 ppt.) on survival of Macrobrachium rosenbergii larvae. The survival rate ranged between 6.54-64.52% at 25 ^oC in 9-12 ppt. whereas it was between 2.63-52.38% when reared at 25 ^oC in 15-18ppt. Post larvae (PL) showed maximum survivability i.e. 44.29% at 25 ^oC, 89.61% at 31 ^oC and 42.70% at 35 ^oC with the same salinity condition of 12ppt.which were also significantly different from each other (P>0.05).Water quality parameters recorded throughout the study period were found within the tolerable ranges (dissolved oxygen 7.3 ±0.06 mg/L, pH 8.0 ±0.04, ammonia from 0.10 ±0.02 mg/L etc).Present result showed that 12 ppt. salinity and 31 ^oC temperature is better for the maximum survivability of larvae (Zoeae) and post larvae of Macrobrachium rosenbergii at hatchery condition.

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