Abstract
Black tiger shrimp, Penaeus monodon (Fabricius) is a non-piscine organism becomes most important aquatic resource of Bangladesh in the last decades. Traditionally it is cultured in 15-30 ppt salinity. Effect of different low salinity on its survival, growth, production and economic return was observed in three salinity levels 10 ppt, 7 ppt and 5 ppt for 110 days. Juvenile shrimps (approximately 5g each) were stocked at 4 m-2 density. It was observed that salinity had no significant effect on the survival of P. monodon. However, reduced salinity had significant (p< 0.05) negative impact on individual average growth rate, average weight gain per 14 days, production per unit area (ton/ ha.) and thus economic return. This study revealed that although P. monodon culture is possible in low salinity, the higher salinity ensures better production and economic return.
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