Resumo -O objetivo deste trabalho foi avaliar o efeito de períodos de condicionamento alimentar sobre o desempenho produtivo e a sobrevivência de juvenis de pirarucu (Arapaima gigas), durante a transição da alimentação com massa de peixe moída para dieta formulada seca. Animais com 15,8±1,2 g foram avaliados com substituições graduais da dieta a cada 2, 3, 4 e 5 dias. Após 12 dias de condicionamento alimentar, as substituições a cada dois e três dias proporcionaram as maiores taxas de crescimento específico. Recomenda-se a substituição da dieta à base de peixe moído por dieta formulada seca a cada dois ou três dias.Termos para indexação: Arapaima gigas, alimento vivo, desempenho produtivo, espécie carnívora, mortalidade, treinamento alimentar. Feed conditioning periods for pirarucu juveniles in the feeding transition from moist to dry feedAbstract -The objective of this work was to evaluate the effect of feed training periods on the productive performance and survivorship of pirarucu juveniles (Arapaima gigas), during the transition from ground fish mass diet to a dry-feed diet. Animals with 15.8±1.2 g were evaluated with gradual substitutions of the diet at every 2, 3, 4, and 5 days. After 12 days from feed training, the substitutions at every two and three days provided the highest specific growth rates. The replacement of diet based on forage fish by dry formulated diet may be done every two or three days.
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