Abstract

OSORIO, A; WILLS, A  and  MUNOZ, A. P. CHARACTERIZATION OF BYPRODUCTS FROM THE FILLETING INDUSTRY OF NILE TILAPIA (Oreochromis niloticus) AND RAINBOW TROUT (Oncorhynchus mykiss) IN COLOMBIA. Rev. Med. Vet. Zoot. [online]. 2013, vol.60, n.3, pp.182-195. ISSN 0120-2952.

The filleting industry of tilapia and rainbow trout generates a great amount of byproducts; there is not information available about their composition and quality. The objective of this research was to determine the byproducts nutritional and microbiological components obtained from the fillets export industry of Nile tilapia and rainbow trout in Colombia. The skeleton showed a high amount of ashes (tilapia: 14.12 ± 0.16%; trout: 6.18 ± 0.06%), calcium (tilapia: 5.70 ± 0.04%; trout: 1.72 ± 0.08%) and phosphorus (tilapia: 1.89 ± 0.06%; trout: 0.84 ± 0.03%), mean while the trimmings had the highest concentration of ether extract (tilapia: 30.10 ± 0.58%; trout: 17.50 ± 0.51%) and the mechanically deboned meat, the higher moisture content (tilapia: 70.38 ± 0.18%; trout: 72.93 ± 0.3%) and protein (tilapia: 14.32 ± 0.03%; trout: 18.88 ± 0.05%). The highest contribution of polyunsaturated fatty acids (PUFA) as a percentage of total fatty acids, was found in the skeleton of the tilapia (17.27%) and trout trimmings (38.68%), with a ratio n6/n3 of 2.67 y 0.71 respectively. In general, the byproducts analyzed met the microbiological standards required by Colombian government, in resolution 122/2012 - Ministry of Social Welfare and Health, by which technical regulations on the phyponents obtained from the fillets export industry of Nile tilapia and rainbow trout in sicochemical and microbiological requirements for fishery products, particularly fish, mollusks and crustaceans for human consumption. The results show that byproducts studied could be an important source of protein, ash, polyunsaturated fatty acids with and appropriate microbiological quality, showing potential for human food or animal feed.

Keywords : Head; skeleton; trimmings; mechanically deboned meat.

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