Growth Performances of Clarias gariepinus Fry Fed Hermetia illucens Based Diet Supplemented with Synthetic Amino Acids (Methionine and Lysine)
Ngouana Tadjong Ruben *
Aquaculture Department, Institute of Fisheries and Aquatic Science of Yabassi, Laboratory of Aquaculture and Demography of Fisheries Resources, University of Douala, Douala, P.O. Box 7236, Douala, Cameroon.
Anguissi Fils Thierry
Aquaculture Department, Institute of Fisheries and Aquatic Science of Yabassi, Laboratory of Aquaculture and Demography of Fisheries Resources, University of Douala, Douala, P.O. Box 7236, Douala, Cameroon.
Kana Jean Raphaël
Department of Animal Science, Faculty of Agronomy and Agricultural Sciences, Laboratory of Animal Nutrition, University of Dschang, Dschang, P.O. Box 96, Dschang, Cameroon.
Téguia Alexis
Department of Animal Science, Faculty of Agronomy and Agricultural Sciences, Laboratory of Animal Nutrition, University of Dschang, Dschang, P.O. Box 96, Dschang, Cameroon.
*Author to whom correspondence should be addressed.
Abstract
Objective: this study focused on the effect of a local feed supplement with synthetic amino acids (methionine and lysine) on the survival and growth of Clarias gariepinus fry in happas.
Study Design: the study took place at the DJOKWE aquaculture farm located in the Cameroon Littoral Region, Moungo Department, Nkongsamba 1st District.
Methodology: Six (06) local T0- diets without synthetic amino acid negative control, T0+ coppens imported feed positive control, T1 (L1.5/M1) containing 1.5% lysine and 1% methionine, T2 (L1, 5/M1.5) containing 1.5% lysine and 1.5% methionine, T3 (M1/L2) containing 1% methionine and 2% lysine, T4 (M1/L2.5) containing 1% methionine and 2.5% lysine were tested in triplicate on 540 fry of 10± 3.1g distributed in 18 happas of 0.5 m2. The fish were fed 3 times per day at a rate of 8% of the ichthyo biomass. Every 14 days, zootechnical parameters were evaluated.
Results: depending on the level of supplementation, the survival rate was higher for the T0+ coppens treatment, 96.66%, and lower for T4 (M1/L2.5) supplemented with 1% methionine and 2.5% of lysine with 80%. The significantly highest average weight gain (p<0.05) was recorded with the T0+coppens treatment (89.67±1.52g) compared to the T1 (L1.5/M1) and low (66. 33 ±00g) compared to treatment T3 (M1/L2). The specific growth rate was higher (p˃0.05) or (2.83%±0.16g/d) with T2(L1.5/M1.5) and lower (0.78%±0 .02%g/d) for T0+ coppens. As for the condition factor K, it is significantly higher for the T0+coppens treatment (0.46%±0.030) and lower for the T4 treatment (0.29±0.023).
Conclusion: the incorporation of 5% of black soldier fly larva into local feed supplemented with 1.5% lysine and 1% methionine makes it possible to improve the survival of Clarias gariepinus fry but also their growth as well as the production cost.
Keywords: Maggot meal, synthetic amino acids, local feed, Clarias gariepinus, growth