Time-Of-Day of Feeding Affects Growth, Fattening, and Serum Hormone Levels in Channel Catfish
American Society of Zoologists
Channel catfish Ictalurus punctatus were maintained on a 12L:12D photoperiod,
20˚ ± 1˚C, and received one of two commercial diets either early (0730 h), late (1600 h), or at both times of day (feeding rate 2.5 g% body weight/day). After 6 weeks of feeding, body weight, body length, abdominal fat weight and mean serum cortisol and thyroxine levels (determined by radioimmunoassay) differed among feeding regime groups depending on the diet, time-of-day of feeding and/or fedding frequency. There were also diel variations in serum cortisol and thyroxine titers; the pattersn of serum cortisol and thyroxine differed with diet and time-of-day of feeding, respectively.
Noeske, Teresa A.; Spieler, Richard E.; and Parker, W. C., "Time-Of-Day of Feeding Affects Growth, Fattening, and Serum Hormone Levels in Channel Catfish" (1983). Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures. 57.