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The Effect of Calcium Hardness on Hatching Success of Channel Catfish × Blue Catfish Hybrid Catfish Eggs
Author(s) -
Chatakondi Nagaraj G.,
Torrans Eugene L.
Publication year - 2012
Publication title -
north american journal of aquaculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 41
eISSN - 1548-8454
pISSN - 1522-2055
DOI - 10.1080/15222055.2012.676003
Subject(s) - catfish , ictalurus , hatching , biology , calcium , fishery , zoology , chemistry , fish <actinopterygii> , organic chemistry
The 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 (CaCO 3 ) 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 CaCO 3 at 75 mg/L is recommended for incubating hybrid catfish eggs.