Effects of dietary lipid and reduced glutathione on composition and storage quality of channel catfish, Ictalurus punctatus (Rafinesque) Academic Article uri icon


  • Abstract. Semi‐purified casein/gelatin diets containing two levels of lipid (5 or 10%) and three levels of reduced glutathione (0,0·1 or 1·0%) in a factorial arrangement were fed to fingerling channel catfish, Ictalurus punctatus (Rafinesque), in aquaria for 10 weeks. Factorial analysis of variance indicated that dietary lipid had significant (P < 0·05) effects on growth, feed efficiency and body composition of channel catfish. Diets containing 10% lipid generally produced higher weight gain and feed efficiency values as well as higher intraperitoneal fat. The higher level of dietary lipid also produced lower moisture and higher lipid (on a wet‐weight basis) levels in whole‐body and fillet tissues. Stability of fillet samples was estimated by 2‐thiobarbituric acid (TBA) analysis which revealed that 10% dietary lipid significantly elevated fillet TBA values while glutathione did not have any effect. Therefore, dietary lipid level altered growth and body composition of channel catfish as well as oxidative stability of fillet samples while dietary glutathione was generally ineffective. Copyright © 1993, Wiley Blackwell. All rights reserved

author list (cited authors)

  • GATLIN, D. M., & BAI, S. C.

citation count

  • 9

publication date

  • July 1993