Author(s): Rubia Akter, Md. Motiur Rahman, HM Rakibul Islam, Dr. Shahidul Islam and Dr. Khan Kamal Uddin Ahmed

Abstract: An experiment was carried out to explore the impact of probiotics on growth, survival and production of Prawn (Macrobrachium rosenbergii) in the Shrimp Research Station ponds where Juvenile prawn were stocked at a density of 2.5 juvenile/m² and was fed with quality feed (gold plus-grower) twice daily at the rate of 10.3% of prawn biomass. Three types of probiotics were supplemented viz, super PS probiotics (T₁) broadcast all over the ponds mixed with clay, super biotic probiotics (T₂) broadcast over the pond mixed with feed and super PS with super (T₃) biotic mixed broadcast over the ponds and each treatment having 3 replicates. Water quality parameters were checked periodically and found within suitable range for prawn growth without finding any stress. Growth was measured and feed was adjusted in accordance to growth rate. After the culture period of 180 days higher survival (84%) was found in T₂ followed by 81.9% in T₃ and 76.9% in T₁. average weight 70.6 g was found higher in T₂ which was significantly (p<0.05) different from those of T₃ (62.3 g) and T₁ (55.4 g). Food conversion ratio (FCR) was lower (2.71) in T₂ than these of 3.20 in T₁ and 2.92 in T₃. Higher yield was recorded in T₂ (1,210.4 kg/ha) than those of T₃ (1,130.46 kg/ha) and T₁ (940.3 kg/ha). The findings from the study revealed that growth, survival and yield were found higher from the ponds treated with super biotic than that of others.

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