Effects of different ratios of crude protein and non-fibrous carbohydrates on growth, metabolism, physiology, nutrient utilization and muscle cellularity of Lophiosilurus alexandri, a carnivorous freshwater fish

José Carlos de Oliveira-Júnior, Gustavo Augusto Carvalho Costacurta de Aguiar, Cristiana Leonor da Silva Carneiro, André Luís Fialho Ladeira, Daniel Abreu Vasconcelos Campelo, Wilson Massamitu Furuya, Fábio Aremil Costa dos Santos, Jener Alexandre Sampaio Zuanon, Ronald Kennedy Luz, Ana Lúcia Salaro