Location: Warmwater Aquaculture Research UnitTitle: Palatability of diets for channel catfish that contain amprolium or salinomycin using feed conversion ratio as criterion Author
Submitted to: North American Journal of Aquaculture
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 9/25/2012
Publication Date: 12/12/2012
Citation: Manning, B.B., Griffin, M.J., Khoo, L.H., Wise, D.J., Greenway, T.E. 2012. Palatability of diets for channel catfish that contain amprolium or salinomycin using feed conversion ratio as criterion. North American Journal of Aquaculture. 75(1):99-101. Interpretive Summary: This study looked at the palatability of diets for juvenile channel catfish containing Amprolium or Salinomycin which are being considered as possible treatments for Henneguya ictaluri, the causative agent of proliferative gil disease. There appears to be no effect of Amprolium diets compared to the basal control diet but the Salinomycin containing diets revealed poorer palatability at the higher inclusioin rates (30 mg and 60mg/kg diet).
Technical Abstract: Two feeding studies were conducted to evaluate the palatability of diets for juvenile Channel Catfish Ictalurus punctatus that contained the poultry anticoccidial drugs Amprolium or Salinomycin, which are candidates to control the Channel Catfish myxozoan parasite, Henneguya ictaluri. These chemotherapeutic drugs can effectively control outbreaks of other myxozoan parasites in various species of aquaculture fish. To evaluate palatability of diets containing these drugs, Channel Catfish maintained in glass aquaria were fed sinking diets composed of commercial catfish feed that had been pulverized and reformed into pellets that contained three levels of each of the two anticoccidial drugs for short periods of time, e.g. 10 d for Amprolium and 8 d for Salinomycin. Results showed that fish readily consumed the basal control diet containing no drug and diets containing all three levels of Amprolium based on comparisons of feed conversion ratios (FCR) for the four dietary treatments. On the other hand, FCR values of the Salinomycin treatments were significantly (P < 0.05) poorer for the two highest inclusion levels (30 and 60 mg/kg diet) of this drug compared with the control diet, which indicated poor palatability of diets containing these levels of Salinomycin by Channel Catfish