Effects of stocking density on growth performance, feed utilization and economic profitability of juvenile Heterotis niloticus reared in a pen fish farming
Paper Details
Effects of stocking density on growth performance, feed utilization and economic profitability of juvenile Heterotis niloticus reared in a pen fish farming
Abstract
Diversification and extension of fish species is a reliable solution to increase aquaculture production. But the culture of any species of fish requires the control of several factors, namely the quantity and quality of feed and stocking density that influence survival rate, growth, feed efficiency and production. This study aims to assess the effect of initial stocking density on the growth and economic profitability of juvenile Heterotis niloticus reared in a fish pond. Nine (9) stocking densities (D1 = 0.15 fish/m2; D2 = 0.2 fish/m2; D3 = 0.3 fish/m2; D4 = 0.4 fish/m2; D5 = 0.5 fish/m2; D6 = 0.6 fish/m2; D7=0.7 fish/m2; D8= 0.8 fish/m2; D9 = 0.9 fish/m2) were tested with specimens (176.78 ± 24.42g) in pens measuring 20 m2 installed in ponds. Juveniles were fed with rice bran (10 % protein) with respective food rations of 5, 4, and 3.5% of biomass for 81 days. The results show better growth of fish in D1 with 12.23 g/d, while the feed conversion ratio, condition factor, annual production were improved in D3 with respectively 1.68, 1.22 and 6.97 t/ha/year. At the level of the economic evaluation, no significant difference was observed (p ˃ 0.05) between the densities D1 and D3 concerning profit margins with 828.78 and 788.40 CFA francs respectively. From the results, the density of 0.3 fish/m2 seems to be the best option for the good production of H. niloticus in a farming environment.
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Tra Florent Gouri-Bi, Gopéyué Maurice Yéo, Jean Noel Yapi, Nahoua Issa Ouattara, Mélécony Célestin Blé, 2022. Effects of stocking density on growth performance, feed utilization and economic profitability of juvenile Heterotis niloticus reared in a pen fish farming. Int. J. Biosci., 21(5), 232-238.
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