The effects of water type on growth, survival and condition of Poecilia velifera

Abstract

Seven growth periods were completed on juvenile velifera (Poecilia velifera) for a period of 2 weeks to determine the optimal water type for best daily growth, food intake, feed conversion ratio, weight gain, survival and condition factor. Four water types (T1 = 25°C W1, T2 = 30°C W1, T3 = 25°C W2, T4 = 30°C W2) were used to grow up P. velifera for 105 days. In each aquarium, fifteen individuals were stocked and fed to satiation twice a day. Bulk weight of each group was measured 2 weeks interval. Growth rate did not increase with water temperature. Water quality made difference. Fish with W1 grew better than with W2. Fish in T1 had the best growth (daily growth 10.37 mg/day). Food intake was the highest in T1. Feed conversion ratio did not differ significantly among groups. Survival was low among 4 groups (T1, T2, T3, and T4 were 55.6, 53.3, 53.3, and 33.3%, respectively), but not significant. Condition factor was the best in T1 (1.61).