Abstract
AbstractThe present study was designed to determine the optimal level of calcium hardness in hatching waters to incubate channel catfish Ictalurus punctatus × blue catfish I. furcatus hybrid catfish eggs. Hatching success of hybrid catfish eggs was higher (P < 0.05) at a calcium hardness (CaCO3) of 75 mg/L in hatching waters than at a calcium hardness of 25 or 50 mg/L; however, further increases in calcium concentration did not improve hatching success. A minimum water hardness of CaCO3 at 75 mg/L is recommended for incubating hybrid catfish eggs.
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