Use of artificial substrate in pond culture of freshwater prawn (Macrobrachium rosenbergii): a new approach regarding growth performance and economic return

Dilshad Milky  Tuly; Md. Sherazul  Islam; Mst.  Hasnahena; Md. Rezwanul  Hasan; Md. Tawhid  Hasan

doi:10.17017/j.fish.59

Dilshad Milky Tuly Department of Fisheries and Marine Bioscience, Jessore University of Science and Technology, Jessore-7408, Bangladesh
Md. Sherazul Islam Department of Fisheries and Marine Bioscience, Jessore University of Science and Technology, Jessore-7408, Bangladesh
Mst. Hasnahena Department of Fisheries and Marine Bioscience, Jessore University of Science and Technology, Jessore-7408, Bangladesh
Md. Rezwanul Hasan Department of Fisheries and Marine Bioscience, Jessore University of Science and Technology, Jessore-7408, Bangladesh
Md. Tawhid Hasan Department of Fisheries and Marine Bioscience, Jessore University of Science and Technology, Jessore-7408, Bangladesh

Keywords: Artificial substrate, freshwater prawn, pond culture, growth performance, economic return

Abstract

An experiment was conducted for six months to evaluate the effects of artificial substrates on the survival, growth and production of Macrobrachium rosenbergii juveniles. The T₁ contained locally available bamboo-made substrate both vertical and horizontal and T₂ received no substrate. Juvenile prawns (0.40±0.13 g) were stocked at the rate of 19,760 prawns ha^-1. The water quality parameters range such as temperature, pH and DO were 22.06-33.45°C, 7.70-8.40 and 4.75-6.15 mgl^-1 respectively which was no significant difference (P<0.05) between two treatments. The final weight was 56.48±6.56 g and 45.03±2.11 g in T₁ and T₂ respectively. The survival rate of T₁ was 63.12% which was significantly higher (P>0.05) than T₂ (56.87%). The specific growth rate, food conversion ratio and protein efficiency ratio were 1.19 % and 1.14 %, 3.15 and 4.39, 0.98 and 0.71 in T₁ and T₂ respectively which were not significantly different (P<0.05) between treatments. The total production and net profit in T₁ was 1408 kgha^-1 and BDT 117,325 ha^-1 which was significantly higher (P>0.05) than T₂. Thus growth and survival of prawn juveniles improved in presence of artificial substrate which could be economically viable technique for the freshwater prawn culture.

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