Abstract
Fiber sources, namely, sugar cane bagasse (CB), hydrolyzed sugar cane bagasse (HB), corn cob (CC) and rice hulls (RH), were evaluated for their performance in diets of the Nile tilapia ( Oreochromis niloticus ) fingerling. Experiment lasted 37 days and was done at the Aquaculture Lab of the State University of Maringa, Maringa PR Brazil. 240 fingerlings, mean initial weight 0,600,01g, were employed. Distributed in completely randomized blocks design, the fish underwent four treatments and six replications. Each experimental unit consisted of 160 L pens. Mean final weight of Nile tilapia fingerlings fed on CC diet was higher than those fed on CB (p < 0.05). HB and RH, however, showed no difference from results with other diets. In final length CC was better (p < 0.05) than CB and RH and there was no difference in HB when compared to other treatments. Concerning weight gain ratio, CC and HB were alike and both were better than RH and CB. With regard to Nile tilapia fingerling performance CC and HB have better fiber sources than CB and RH.
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