Comparative study of the chemical composition, fatty acid profile, and nutritional quality of Lophiosilurus alexandri (Siluriformes: Pseudopimelodidae), a Brazilian carnivorous freshwater fish, grown in lotic, lentic, and aquaculture environments

Author(s)

Léa S. Sant´Ana ^[1] ; Adriane A. Iwamoto ^[2] ; Daniel V. Crepaldi ^[3] ; Túlio P. Boaventura ^[4] ; Lilian V. Teixeira ^[5] ; Edgar A. Teixeira ^[6] ; Ronald K. Luz ^[7]

Affiliation

^[1] Universidade Estadual Paulista Júlio de Mesquita Filho. Centro de Aquicultura - Brasil

^[2] Universidade Estadual Paulista Júlio de Mesquita Filho. Centro de Aquicultura - Brasil

^[3] Instituto Brasileiro do Meio Ambiente e dos Recursos Renováveis - Brasil

^[4] Universidade Federal de Minas Gerais. Laboratório de Aquacultura - Brasil

^[5] Universidade Federal de Minas Gerais. Laboratório de Aquacultura - Brasil

^[6] Universidade Federal de Minas Gerais. Laboratório de Aquacultura - Brasil

^[7] Universidade Federal de Minas Gerais. Laboratório de Aquacultura - Brasil

• Document type: Journal article
• Source: Neotropical Ichthyology; v. 17, n. 4 2019-12-02.

Abstract

ABSTRACT Lophiosilurus alexandri is a carnivorous freshwater fish endemic of São Francisco basin and an endangered species. In this study, we analysed the chemical composition (moisture, protein, ash and lipid), fatty acid profile, and nutritional quality (atherogenic index, thrombogenecity index, ratio between hypocholesterolemic and hypercholesterolemic fatty acids and ω6/ω3 = ratio) of L. alexandri in lotic (river), lentic (hydroelectric dams) environments, under natural fed, and in laboratory controlled conditions fed with commercial diets. Cultured and lentic fish had significantly higher lipid levels (1.5 and 1.9- fold, respectively) than lotic fish. Lentic L. alexandri had significantly higher eicosapentaenoic acid (EPA) levels (4×) than cultured or lotic L. alexandri. Docosahexaenoic acid (DHA) levels were the highest in lentic fish, followed by lotic fish. Lentic fish had greater proportion of fatty acid ω6/ω3 than lotic or cultured fish. The results of this study showed that L. alexandri is a lean fish (1-2% of total lipids) and that the environment has a great influence on the fatty acid profile. These results may be a reference for further studies, primarily as a source of information for conservation L. alexandri through restocking and the development of commercial projects of aquaculture. (AU)

• FAPESP's process: 13/10477-9 - Pacamã (Lophiosilurus alexandri): sensory analysis, chemical analysis and value-added products
• Grantee: Adriane Aiko Iwamoto
• Support Opportunities: Scholarships in Brazil - Master