ABSTRACT
Growth, survival and production performances of Thai Anabas testudineus fingerlings were evaluated for seven weeks in nine nursery ponds having an area of 0.012 ha each with an average depth of 1.0 m. Three stocking densities such as 1 million ha-1 (T1-Treatment 1), 1.2 million ha-1 (T2- Treatment 2) and 1.4 million ha-1 (T3-Treatment 3) were tested with three replications. Fry were fed with commercial nursery feed (36-34% crude protein). The rate of feeding was 14% to 8% of the estimated body weight of fry. The physico-chemical and biological parameters of pond water were within the suitable range for fish culture. Growth in terms of final weight, final length, weight gain, length gain and specific growth rate, and survival of fingerlings was significantly higher in T1 than those obtained from T2 and T3. The survival of fish fry was 65.5%, 55.5% and 49% in T1, T2 and T3 respectively. The Food conversion ratio (FCR) values ranged between 1.75 and 3.20 with treatment T1 resulting the lowest FCR. Higher number of fingerlings was produced in T3 than those in T2 and T1 but the highest net benefits were obtained from T1 than those from T2 and T3. Among the treatments evaluated, 1 million ha-1 was the best stocking density considering the highest growth, survival, production and net benefits of the fingerlings of Thai A. testudineus in nursery ponds.
ABSTRACTGrowth, survival and production performances of Thai Anabas testudineus fingerlings were evaluated for seven weeks in nine nursery ponds having an area of 0.012 ha each with an average depth of 1.0 m. Three stocking densities such as 1 million ha-1 (T1-Treatment 1), 1.2 million ha-1 (T2- Treatment 2) and 1.4 million ha-1 (T3-Treatment 3) were tested with three replications. Fry were fed with commercial nursery feed (36-34% crude protein). The rate of feeding was 14% to 8% of the estimated body weight of fry. The physico-chemical and biological parameters of pond water were within the suitable range for fish culture. Growth in terms of final weight, final length, weight gain, length gain and specific growth rate, and survival of fingerlings was significantly higher in T1 than those obtained from T2 and T3. The survival of fish fry was 65.5%, 55.5% and 49% in T1, T2 and T3 respectively. The Food conversion ratio (FCR) values ranged between 1.75 and 3.20 with treatment T1 resulting the lowest FCR. Higher number of fingerlings was produced in T3 than those in T2 and T1 but the highest net benefits were obtained from T1 than those from T2 and T3. Among the treatments evaluated, 1 million ha-1 was the best stocking density considering the highest growth, survival, production and net benefits of the fingerlings of Thai A. testudineus in nursery ponds.
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