Use of tuna industry waste in diets for Nile tilapia, Oreochromis niloticus, fingerlings: effect on digestibility and growth performance

• DOI: 10.3856/vol41-issue3-fulltext-10
• Publication Date: 2021-06-10T22:15:12Z
• Authors: Crisantema Hernández; Miguel A. Olvera-...; Domenico Voltolina; Ronald W. Hardy; Blanca González-R...; Patricia Domingue...; Martin Valverde-R...; Samuel Agramon-Ro...
• Keywords: Nile tilapia; Silage

During the tuna canning process, about 52~54% of total weight fish is discarded as waste, which can be processed in order to obtain byproducts meal (TBM), or stabilized silage hydrolysates (TSH). Both products were tested replacements soybean (SBM), diets for fingerling male Nile tilapia Oreochromis niloticus. Seven test isonitrogenous (35% CP) and isoenergetic (19 kJ g-1): a basal diet contained SBM main protein source (TSH0); four experimental had increasing inclusion levels TSH replacing 25, 50, 75 100% protein. The sixth TBM sole source, commercial feed was used reference (RD). fed eight weeks triplicate tanks, each with 15 fry (initial 0.89 ± 0.29 g). Tilapia greater gain intake, lower conversion ratios than those containing TSH. RD, TSH25 TSH50 gave similar growth response. Fish TSH0, TSH75% TSH100% showed reduced performance.