Antibiotics are one of the most common groups used as
feed additives in the frame of growth promoter. Several antibiotics
have been in use as growth promoters in fish farms ever
since. Sanchez-Martinez et al. (2008) studied the effect of supplementing
channel cat fish (Ictalurus punctatus) feeds with
oxytetracycline. Treated fish exhibit a significant increase in
weight gain suggesting a growth promotion action of this antibiotic
agent.