Effects of stocking density and artificial substrates on yield and water quality in a biofloc shrimp nursery culture oleh Esmeralda Chamorro Legarda, Suhellen Santos Barcelos, Joselle Cursino Redig, Norha Constanza Bolívar Ramírez, Ariane Martins Guimarães, Carlos Manoel do Espírito Santo, Walter Quadros Seiffert, Felipe do Nascimento Vieira