Increasing the conjugated linoleic acid content in cultivated fish by dietary means: a potential benefit for human health

Linoleic acid in cultivated fish and benefit for human health
  • Resposible Luisa Maria Pinheiro Valente
  • Funding Entity POCTI/CVT/39237/2001
  • Duration 2003-2005

Linoleic acid in cultivated fish and benefit for human health

Objectives and main results

Fish in response to a similar dietary CLA supplementation show the highest muscle CLA deposition of any other animal. This project clearly suggested that CLA can be incorporated up to 1 % in both rainbow trout (Bandarra et al., 2006; Valente et al., 2007) and sea bass diets contributing to the production of a functional food. Dietary CLA did not affect growth parameters, feed conversion, nutrient or energy utilization, body composition or lipogenic enzymes activity in juvenile or market size fish up to 2%. In both muscle and liver the dietary inclusion of CLA significantly affected the total percentages of polyunsaturated (PUFA), saturated and monounsaturated fatty acids (MUFA). Dietary CLA supplementation resulted in a significant increase of the biologically active trans-10, cis-12 and cis-9, trans-11 CLA isomers in both liver and muscle. Sensory data indicated no significant differences between the trout fed without CLA and trout fed with CLA. Six weeks of 1% CLA supplementation is enough to attain maximal deposition levels in market size rainbow trout (Oncorhynchus mykiss) muscle.

Scientific Publications

Bandarra, NM, Nunes, ML, Prates, JAM, Pereira, S, Andrade, AM, Monteiro, M, Rema, P, Valente, LMP. 2006. Effect of dietary conjugated linoleic acids on muscle, liver and perivisceral lipids in rainbow trout juveniles (Oncorhynchus mykiss). Aquaculture 254, 496-505. https://doi.org/10.1016/j.aquaculture.2005.10.034

Figueiredo-Silva, AC, Rema, P, Bandarra, NM, Nunes, ML, Valente, LMP. 2005. Effects of dietary conjugated linoleic acid in growth, nutrient utilization, body composition and hepatic lipogenesis in rainbow trout juveniles (Oncorhynchus mykiss). Aquaculture 248, 163-172. https://doi.org/10.1016/j.aquaculture.2005.04.022

Ramos, A, Bandarra, NM, Rema, P, Vaz-Pires, P, Nunes, ML, Andrade, AM, Cordeiro, AR, Valente, LMP. 2008. Time course deposition of conjugated linoleic acid in market size rainbow trout (Oncorhynchus mykiss) muscle Aquaculture 274, 366-374 https://doi.org/10.1016/j.aquaculture.2007.11.040

Valente, LMP, Bandarra, NM, Figueiredo-Silva, AC, Rema, P, Vaz-Pires, P, S, Martins, S, Prates, JAM, Nunes, ML. 2007. Conjugated linoleic acid in diets for large size rainbow trout (Oncorhynchus mykiss): effects on growth, chemical composition and sensory attributes. British Journal of Nutrition 97, 289-297. https://doi.org/10.1017/S000711450733729X

Valente, LMP, Bandarra, NM, Figueiredo-Silva, A, Simões, RM, Nunes, ML. 2007. Influence of conjugated linoleic acid on growth, lipid composition and hepatic lipogenesis in juvenile European sea bass (Dicentrarchus labrax). Aquaculture 267, 225-235. https://doi.org/10.1016/j.aquaculture.2007.02.008

Master's Thesis

Figueiredo-Silva, AC. 2005. Efeitos da suplementação de ácido linoleico conjugado em dietas para juvenis de truta arco-íris (Oncorhynchus mykiss). Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto. 78 pp.

Ramos, A. 2006. Efeito do tempo na suplementação de dietas com ácido linoleico conjugado (CLA) em trutas de tamanho comercial. Faculdade de Medicina Veterinária, Lisboa. Tese defendida na Faculdade de Medicina Veterinária de Lisboa em Janeiro de 2007.

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