Guide elementaire pour la gestion de centres piscicoles producteurs d'alevins de carpe
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The report covers activities carried out during the second consultancy related to formulation and elaboration of feeding methods for shrimps within the objectives of project MOZ/86/033 - “Pilot for Coastal Shrimp Culture” at Costa Do Sol, Mozambique. During his first visit in September-November 1991 the consultant provided formulas of some diets for Penaeus indicus and trained the local staff in shrimp feed production and feeding methods. During the second visit the consultant observed that: The project initiated culture of P. monodon rather than of P. indicus, as originally anticipated, which required adjustment of the feeding formula for this other species. The quality of the feed was reduced because of changes in treatment of feed component (raw rather than cooked soybean). Due to the non availability of the product, use of raw soybean meal was later completely eliminated, and the feed was prepared with fish meal as the only source of protein with further reduction of the feed quality. The recommendation to mill the whole raw material into particles no bigger than 0.6 mm was not followed; the consultant found that particles bigger than 1 and 2 mm were used. It was also observed that the feed was contaminated with important amounts (5 to 15%) of material remained in the mixer after preparation of feed for other animal species. The shrimps were grossly overfed as a consequence of inadequated evaluation method of the population and failure to use feeders to measur e the feed quantities. The feed was given only during the night and very early in the morning and distributed at the edges of the tanks rather than by boat throughout the whole area. The evaluation of the population in the tanks was also derived from measurements during the night and at the edges; this fact gave an overestimate of the population, and the feed was not totally consumed.