Effects of stocking densities on growth and survival of Thai Sharpunti (Barbonymus gonionotus) in earthen ponds

Abstract

The present study was conducted over 4 months during 1^st September to 30^th December 2005 to observe the effects of stocking density on growth and survival of Thai Sharpunti, Barbodes gonionotus in 3 earthen ponds of size of 2.8    decimal each. The stocking densities of 80, 100 and 120 fish/decimal were treated as T₁, T₂ and T₃, respectively. All    the treatments were subjected to the same feeding regime and fertilization. The range of water quality parameters    such as temperature were 30.31, 30.16 and 29.65 ⁰C, transparency were 29.94, 37.63, and 40.02 cm, water depth    were 143.91, 148.67 and 151.54 cm, dissolved oxygen were 4.72, 4.35 and 4.24 mg/l, pH were 7.71, 7.49 and 7.31,    plankton biomass were 43.05 x 10⁵ /l, 37.97 x 10⁵ /l and 36.05 x 10⁵ /l in T₁, T₂ and T₃, respectively. Among the    growth parameters, mean weight gain were 48.87 g, 41.43 g and 34.09 g, percent weight gain were 698.21%,    591.93% and 487%, the average daily gains were 1.65, 1.54 and 1.20 g, the specific growth rate were 1.73, 1.61 and    1.47%, in T1, T2 and T3 respectively. The gross total productions of Barbonymus gonionotus were 1041.96, 1085.71    and 1019.64 kg/ha/120 days while the net productions were 911.60, 929.46 and 846.43 kg/ha/120 days in T₁, T₂ and    T₃, respectively. The gross and net total productions in T₂ were highest among the treatments. The highest growth    and survival rate were obtained in T₁.

DOI: http://dx.doi.org/10.3329/jbau.v9i2.11048

J. Bangladesh Agril. Univ. 9(2): 327338, 2011