This study explored the optimal dietary available phosphorus (P) requirement for juvenile Asian red-tailed catfish ( Hemibagrus wyckioides ). Five isonitrogenous (42.00 %) and isolipidic (9.00 %) diets with monocalcium phosphate supplementation levels of 0.00 %, 0.75 %, 1.50 %, 2.25 %, and 3.00 % (namely P0, P0.75, P1.5, P2.25, and P3) were fed to fish for 56 d. Weight gain rate increased with phosphorus supplementation up to 2.25 % and then declined. The apparent digestibility coefficients (ADC) of phosphorus and calcium, as well as th...
