Evaluación del uso de alimentos alternativos en el pre engorde y engorde de tilapia roja (Oreochromis sp.) en la Comunidad de Playa Rica - Noroccidente de Pichincha

Abstract

The principal goal of this study was to evaluate if alternative plant food can partially replace the commercial feed in the pre fattening and fattening of tilapia. Alternative foods were subjected to physical testing and bromatological analyzes. To evaluate the effect of these foods, three diets were formulated substituting in 0, 5 and 10 % of commercial feed, for which 45 fish, distributed in three treatments with three replicates each were used. The effect of food was evaluated through production parameters and indexes in food consumption, also fresh meat and gutted tilapia was evaluated, too. Finally, the best economic treatment was determined for each stage by the method of partial budgets. Physical test determined that alternative food is fit for consumption as they presented good characteristics for capture and ingestion. Bromatological analysis determined that the nutritional compositions of alternative foods are lower compared to commercial foods, except the carbohydrate content, however, it was not a negative impact on the growth of fish. The data analysis established that the fish weight gain and better, and better nutritional treatment composition were 10 % substitution in the two stages. According with the economic analysis, the best treatment was 10 % substitution of each stage, as they showed better net profits.