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The sustainable aquaculture in morocco by optimization of the energy of the feed of rainbow trout

Aba Mustapha, Belghyti Driss, Benabid Mohammed, Maychal aziz

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Int. J. Agron. Agri. Res.7(1), 36-44, July 2015


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This research is an update in fish nutrition research in Morocco, and provides insight on the progression and evolution of this field in order to meet the needs of the aquaculture with the purpose to achieve a balance in fish nutrition and aquaculture sustainability. In order to compare the effects of varying dietary digestible protein (DP) and digestible energy (DE) content of two extruded foods on environment, an experimental test was conducted at National Center of Hydrobiology and Fish Culture in city Azrou Morocco. The comparison of the two foods with different formulation and different energy is perfomed in isoenergetic conditions. Following this study, two diets were formulated ; the extruded diet A with 41% crude protein, 27% fat and 20% carbohydrate while the extruted food B with 39.7% CP, 24 % fat and 15,7 carbohydrates with digestible energy respectively of 21.32 Mj and 19.32 Mj. The initial average weight of the trouts was 100 g from the same batch of eggs were divided randomly into six fiberglass conical tanks at open circuit. The diet was assigned to 6 tanks for 50 fish each with three replicates for each diet. The extruded diet A by low ratio digestible protein/ digestible energy, emits less nitrogen by the effect of the protein-sparing as we also note this food contains less phosphate that releases phosphate discharges decreased by fish, there by contributing to sustainable aquaculture.


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The sustainable aquaculture in morocco by optimization of the energy of the feed of rainbow trout

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