The growth rates and feed conversion ratios of red hybrid tilapia
fingerlings fed diets with 0%, 4%, 8% and 12% of cod liver oil, substituted
against corn oil (Table 2), showed no significant differences
(P > 0.05) (Table 3). At the end of the 10-week feeding trial, the
range of weight gain fish1 was 42.4–46.1 g and the range of feed
conversion ratios was 1.56–1.70. It was observed, however, that
specific growth rate and overall weight gain decreased slightly as
dietary fish oil increased. A single mortality occurred during the
feeding trial.