Growth performance and carcass composition of rainbow trout, Oncorhynchus mykiss (Walbaum), fed the beta-agonist ractopamine

acuicultura agonistas agoniste agonists alimentation des poissons animal growth promoters aquaculture carcass composition composition de la carcasse crecimiento croissance feed conversion efficiency fish feeding fishes growth oncorhynchus mykiss peces poisson (animal) promoteur de croissance animale promotores del crecimiento animal rainbow trout