EXTRUSION TECHNOLOGY OF EXTRUDE FEED OF RAINBOW TROUT (ONCHORYNCHYS MYKISS WALBAUM, 1792)
- 1. Environmental Engineering Team. Dept. of Biology, Faculty of Sciences and Techniques, University of Sultan Moulay Slimane. M’Ghila, B.O. 523. 23 000 Beni-Mellal, Morocco.
- 2. Environmental Engineering Team. Dept. of Biology, Faculty of Sciences and Techniques, University of Sultan Moulay Slimane. M’Ghila, B.O. 523. 23 000 Beni-Mellal, Morocco.
- 3. Fish Farming Ain Aghbal, Azrou – Morocco.
- 4. Fish Farming Ain Aghbal, Azrou – Morocco.
- 5. Environmental Engineering Team. Dept. of Biology, Faculty of Sciences and Techniques, University of Sultan Moulay Slimane. M’Ghila, B.O. 523. 23 000 Beni-Mellal, Morocco.
Abstract: The objective of our research is to develop an efficient and ecological rainbow trout (Onchorynchys Mykiss) food formulation, which can meet the rainbow trout metabolic needs. The comparative testing of three fish food formulation (A, B and C) revealed that food B is the most efficient formulation. This was reflected by the zootechnical performances with the least fish discard than food A and C. Based on results of this experience; we have taken food B as a reference to develop a new formulation according to the eco requirement and social economy. Two types foods of rainbow trout extruded (F1 and F2) have been formulated and prepared using a variety of animal and plant-derived raw materials. F1 was formulated with fish meal as the main source of protein and F2 with a high percentage of corn gluten. The two formulas developed for rainbow trout give significant growth for a short period in 34-days, better zootechnical performances and low fish releases.