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O objetivo deste trabalho foi avaliar o efeito da taxa de alimentação de 5%, 7,5% e 10% do peso vivo dia-1, sobre o desempenho e parâmetros metabólicos de tambaqui, Colossoma macropomum, cultivado em tanques-rede instalados em lago de várzea. Animais que receberam a taxa de alimentação de 5% do peso vivo dia-1, foram os que apresentaram melhor conversão alimentar e após 90 dias de cultivo e valores de proteínas totais plasmáticas significativamente mais baixos. O fornecimento de ração para juvenis de tambaqui, na taxa de 5% do peso vivo dia-1, sob condições de lagos de várzea, permite um desempenho satisfatório da espécie.
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