Abstract:A 63-d experiment was conducted to investigate the dietary protein demand of juvenile Blue Discus Symphysodon haraldi. Five isoenergetic and isolipidic diets were formulated to contain graded levels of crude protein (CP): 50% (CP50), 55% (CP55), 60% (CP60), 65% (CP65), and 70% (CP70). The results showed that survival rate was not affected by dietary protein level. Weight gain (WG) and specific growth rate (SGR) first increased and then decreased as dietary protein level increased, and the highest WG and SGR wa… Show more
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