The influence of alternative sources of saturated and monounsaturated fatty acids, suplemented with LC-PUFA in growth and lipid metabolism of Rachycentron canadum juveniles (Teleostei: Perciformes)

• Grant number: 19/09246-9
• Support Opportunities: Scholarships in Brazil - Master
• Start date: June 01, 2020
• End date: December 31, 2021
• Field of knowledge: Agronomical Sciences - Fishery Resources and Fishery Engineering - Aquaculture
• Principal Investigator: Renata Guimarães Moreira Whitton
• Grantee: Victor Hugo Marques Lorenti
• Host Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The use of fish oil (FO) in marine aquaculture is important because of the presence of long chain and highly unsaturated fatty acids (LC-PUFA) of the n3 series. However production of FO is limited and for this reason alternative sources of lower cost and more stable production as vegetable oils (VO) have been investigated. However, this substitution in most cases negatively impacts the growth and changes the lipid metabolism of the animals, mainly due to the presence of high amounts of saturated (SFA) and monounsaturated (MUFA) fatty acids (FA) and absence of LC-PUFAs in VO. An alternative to producing low-cost diets that meet the nutritional needs of fish is the use of VO supplemented with LC-PUFA. However, studies with marine fish showed that diets with high amounts of SFA and MUFA alter lipid deposition in the liver and the expression of genes related to the synthesis and oxidation of FA. The objective of the present project is to investigate the influence of alternative lipid sources rich in SFA and MUFA supplemented with LC-PUFA on growth and lipid metabolism of Rachycentron canadum juveniles. An eight-week nutritional experiment will be carried out using four isoprotein and isolipidic diets: control diet (with FO only), SFA (rich in SFA), MIX (same levels of SFA and MUFA) and MUFA diet (rich in MUFA). It will be evaluated the growth parameters, the FA profile of lipolytic and lipogenic tissues, the morphology of hepatic and intestinal tissue and the expression of genes related to the pathways of synthesis and oxidation of FA. (AU)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

LORENTI, Victor Hugo Marques. The influence of different ratios of saturated and monounsaturated fatty acids on growth performance and lipid metabolism of Rachycentron canadum juveniles. 2021. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) São Paulo.