Sustainable Aquaculture Practice of Climbing Perch Koi, Anabas testudineus (Bloch, 1792) Under Semi Intensive Aquaculture System in Bangladesh

Abstract

To establish the sustainable aquaculture practices of climbing perch koi, Anabas testudineus experiments were conducted for a rearing period of 100 days in nine earthen ponds having an area of 0.35 ha each. The fry was stocked at 0.1976, 0.2470, and 0.2964 million ha−1 in different farms of Mymensingh district, Bangladesh for treatment T1, T2 and T3. Fish fries having 1.82 ± 0.01 cm in length and 1.52 ± 0.04 g in weight were considered for experimentations initially. Under favourable conditions yield rate was noted highest in treatment T1 and lowest in treatment T3. Final length, final weight and survival of A. testudineus also followed the same trends as weight gained. Individuals in treatment T1 produced significantly higher specific growth rate than treatments T2 and T3. Feed conversion ratio was significantly higher in treatment T1 followed by treatment T2 and T3 in that order. Fish production in treatments T1, T2 and T3 were 31758.66 ± 88.01, 31350.16 ± 98.07 and 28646.56 ± 100.50 kg ha−1 day−100, respectively. Significantly higher production was recorded in treatment T1 than in treatments T2 and T3, respectively. Consistently higher net benefit was found also from treatment T1 than from treatments T2 and T3. Significantly higher economically benefit was also recorded in treatment T1 than in treatment T2 and T3 respectively. Overall, highest growth, survival and net benefit of climbing perch were obtained from treatment T1 at a density of 0.1976 million individual ha−1. Among three treatments, treatment T1 appears to be most sustainable aquaculture practice for koi, A. Testudineus in 100 days rearing system. The present findings indicate the feasibility of establishing sustainable aquaculture of koi in Bangladesh.