The fatty acid profiles and energetic substrates of two Nile tilapia (Oreochromis niloticus, Linnaeus) strains, Red-Stirling and Chitralada, and their hybrid

Autor(es)

Vieira, Vanessa Ap R. O. ^[1] ; Hilsdorf, Alexandre W. S. ^[2] ; Moreira, Renata Guimaraes ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Biociencias, Lab Metab & Reprod Organismos Aquat, Dept Fisiol, Sao Paulo - Brazil

^[2] Univ Mogi das Cruzes, Lab Genet Organismos Aquat & Aquicultura Nucleo I, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: AQUACULTURE RESEARCH; v. 43, n. 4, p. 565-576, MAR 2012.
• Citações Web of Science: 4

Resumo

Protein and lipid content as well as the fatty acid (FA) composition of storage tissues were analysed in two varieties of Oreochromis niloticus (Red-Stirling and Chitralada) and their hybrid. The animals were maintained in cages for 11 months. The samples were taken when the animals weighed 10, 50, 100, 250 and 500 g. The results showed that changes in the metabolic processes occur during an increase in body mass in both varieties of tilapia and also their hybrid, but that these differences are not found in animals collected at the commercial weight. The protein content of the fillet and liver decreased with growth and the same protein content associated with growth was found for fillet lipid content. The genetic variety did not influence the FA profile of the fillet, but different genotypes had different hepatic FA compositions. Even with the same lipid content, the hepatocytes of Chitralada accumulated higher levels of polyunsaturated fatty acids (PUFA) n6 in triglycerides and increased C22:6n3 in the hepatocyte membranes. The higher n6PUFA content was compensated by a lower fraction of saturated FA in the hepatocyte triglycerides. The skin of Chitralada also had higher n6PUFA and C22:6n3 contents, suggesting a higher ability to deposit PUFA in the skin due to alterations in the liver synthetic pathway. (AU)

• Processo FAPESP: 01/08416-4 - Avaliação genética e zootécnica de duas variedades de tilápia nilótica (O. niloticus var. Red-Stirling e O. niloticus var. Chitralada) para o estabelecimento de um programa de produção massal de um híbrido de tilápia vermelha
• Beneficiário: Alexandre Wagner Silva Hilsdorf
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisa Inovativa em Pequenas Empresas - PIPE