Valorization of the duckweed (Spirodela polyrhyza) in the feeding of mono sex male fry of Oreochromis niloticus: Zootechnical performance and economic profitability

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Research Paper 01/09/2021
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Valorization of the duckweed (Spirodela polyrhyza) in the feeding of mono sex male fry of Oreochromis niloticus: Zootechnical performance and economic profitability

Sènan Maxime Boris Djossou, Diane N. S. Kpogue Gangbazo, Arsène F. M. D'almeida, André B. Aboh, Elie Montchowui, Emile D. Fiogbe
Int. J. Agron. Agri. Res.19( 3), 9-16, September 2021.
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In order to evaluate the effect of Spirodela polyrhiza using in diets of Oreochromis niloticus fingerlings, an experiment was conducted on the farm “Awara” in the village of Agongo in Sèmè – Kpodji during 70 days. The initial average weight of fry is about 1g. The stocking density was 13 fry / m². Three experimental diets made with local by-products were tested: T0 (0% S. polyrhiza Meal), T1 (5% S. polyrhiza Meal) and T2 (mixed feed composed of 70% T0 and 30% fresh S. polyrhiza). At the end of the experiment, the survival rate was 100% for all treatments. The best zootechnical parameters were obtained with T1 with a final average weight of 11.67 ± 2.52 g and a consumption index of 1.17 ± 0.30. The highest gross profit margin was also obtained with T1. The lowest economic profitability was obtained.


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