In natura or reduced antinutrients forms of crambe meal in the silver catfish diet/Farelo de crambe nas formas in natura ou reduzida em antinutrientes na dieta do jundia

• Published in: Ciência rural 2014-04, Vol.44 (4), p.692
• Main Authors: Pretto, Alexandra, da Silva, Leila Picolli, Neto, Joao Radunz, Nunes, Lucas Mesquita da Costa, de Freitas, Isadora Liberalesso, Loureiro, Bruno Bianchi, dos Santos, Sergio Alves
• Format: Article
• Language: Spanish
• Subjects: Aspartate; Biomass energy; Glucose; Glycogen; Physiological aspects; Proteases
• ISSN: 0103-8478

This study evaluated the effects of partial replacement of fish meal and meat and bone meal by plant based meal from the biofuel production chain on growth, digestive enzymes and biochemical parameters in silver catfish, Rhamdia quelen. This agro-byproduct was included in the silver catfish feed as an in natura byproduct or in the reduced antinutrients form, obtained after applying chemical treatment to meal. The inclusion of these ingredients was compared to the control treatment (protein based in animal meal) during nine weeks. Growth similar to the control was observed in fish fed with in nature or treated chemically crambe meal in the diet. Inclusion of in natura crambe meal reduced acid protease activity and plasma cholesterol, but did not alter hepatic biochemical parameters. Lower glycogen and glucose concentration in the liver and increase in aspartate aminotransferase were found in fish fed treated crambe meal, signaling an energy deficiency condition. The similar growth response coupled to slight metabolic and digestive changes with in nature crambe meal in relation to the treated meal may indicate that in the inclusion level used this ingredient does not require prior reduction of antinutrients. Key words: vegetable protein, animal meal, Rhamdia quelen, growth, metabolism. Este estudo avaliou os efeitos da substituicao parcial de farinha de peixe e farinha de carne e ossos por farelo de crambe, sobre o crescimento, enzimas digestivas e parametros bioquimicos no jundia (Rhamdia quelen). Este coproduto agroindustrial foi incluido na alimentacao de jundias na forma in natura ou reduzido em antinutrientes, obtido apos a aplicacao de tratamento quimico ao farelo. A inclusao desses ingredientes foi comparada ao tratamento controle (proteina baseada em farinhas de origem animal) durante nove semanas. Crescimento semelhante ao controle foi observado em peixes alimentados com farelo de crambe in natura ou tratado quimicamente na dieta. A inclusao do farelo in natura reduziu a atividade de protease acida e colesterol plasmatico, mas nao alterou os parametros bioquimicos hepaticos. Menor concentracao de glicogenio e glicose nofigado e aumento na aspartato aminotransferase foi encontrada nos peixes alimentados com farelo de crambe tratado, sinalizando uma condicao de carencia energetica. A similar resposta no crescimento, aliada as leves alteracoes digestivas e metabolicas com o farelo de crambe in natura em relacao ao farelo tratado, pode indicar que, no n