Composição centesimal de vegetais orgânicos para potencial utilização na alimentação de peixes

Abstract

Market value is increasingly applied to agroecological products. However, in animal production, agroecology is still very restricted, constituting one of the areas with great possibilities for development. Agroecological/organic-based aquaculture can be an interesting activity for the diversification of production, contributing to food sovereignty and security, as well as an alternative source of income on rural family properties. In the case of fish farming, given that there is no fish feed based on organic products on the national market, an alternative would be to allocate part of organic agricultural production to the development of feed for continental fish farming. The objective of this study was to survey and analyse organic vegetables for potential use in feeding fish produced in the municipality of Laranjeiras do Sul – PR, envisioning organic fish farming as a way of diversifying production on rural family properties in the region. To this end, initially, a survey was carried out of certified agroecological producers who had fish ponds and were interested in developing fish farming. Subsequently, organic products and native fruits were identified with potential for use in feeding captive fish, whether as ingredients in feed or directly in natura. Subsequently, organic products and native fruits were identified with potential for use in feeding farmed fish, whether as ingredients in feed or directly in natura. The foods were analysed in the laboratory to determine their nutritional composition. Six certified organic producers were identified who have fish ponds and are interested in developing fish farming, as well as nine agroecological/organic products and their residues, with potential for use in fish feeding. Through analyses of the proximate composition (moisture, protein, lipids, ash and fiber) of food and waste, it was possible to conclude that the use of tuberous cassava root, sweet potato, cassava leaf, sweet potato leaf and cauliflower as alternative ingredients in diets formulated for fish could be interesting. However, complementary studies evaluating, among other parameters, consumption, digestibility, and performance in relation to the inclusion of these ingredients in diets formulated for different fish species must be carried out. Additionally, it can be inferred that the fresh supply of lettuce, cabbage, and cauliflower leaves to herbivorous fish species, such as grass carp (Ctenopharyngodon idella), is a good alternative for the destination of surplus or, eventually, not commercialized production.