Productive performance of Clarias gariepinus small fish, feeding with reduced protein and similar energy concentration

J. E. Llanes, Magaly Herrera

Abstract


The productive performance of Clarias gariepinus small fish, feeding with reduced protein and similar energy concentration was evaluated. A total of 360 animals were random distributed according to a one-way model in three treatments, with three repetitions. The experimental treatments were: D1 control) 60 % of fish meal (47.89 % CP and 14.04 MJ/kg DE), D2) 51 % of fish meal (44.71 % CP and 13.62 MJ/kg) and D3) 42 % of fish meal (41.08 % CP and 13.54 MJ/kg DE), supplied at 10 % of body weight for 40 days. There were differences in the supply of crude protein (8.25, 7.56 and 6.67 g), which only affected the final weight of the fish in the D3 treatment (14.89, 14.61 and 13.46 g). However, feed conversion (1.24, 1.25 and 1.29) and survival (89.17, 86.67 and 85.83%) did not differ between treatments and protein efficiency improved (1.69, 1.80 and 1.87). The economic analysis showed monetary savings for feeding of $US 162.09 and 268.00 /t, by reducing the concentrations of crude protein in the rations. It is concluded that the productive performance of Clarias gariepinus small fish, feeding with reduced protein and similar energy concentration, is not compromised and has a positive economic effect.
Key words: feeding, catfish, nutrition, nutritional requirements.

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