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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of tropical reservoirs eutrophication on the polyunsaturated fatty acid profile in Astyanax altiparanae (Pisces: Characidae)

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Author(s):
Marques, V. H. [1] ; Moreira, R. G. [1] ; Gomes, A. D. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Biociencias, Dept Fisiol, 101 Rua Matao, BR-05508090 Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Science of The Total Environment; v. 717, MAY 15 2020.
Web of Science Citations: 0
Abstract

The eutrophication increases the quantity of algae that are deficient in highly unsaturated fatty acids (HUFA) n3, as EPA (eicosapentaenoic add) and DHA (docosahexaenoic acid), altering the bottom-up transfer of the entire food chain. Due to the importance of the fatty adds (FA) in physiological processes related to the main role of the membrane phospholipids (PL) and precursors of eicosanoids, and also the little knowledge about the influence of eutrophication in tropical ecosystems, it is important to understand how anthropogenic changes in the aquatic ecosystem affect the lipid quality, specifically n3 HUFAs. This study aimed to investigate the influence of eutrophication on the FA profile of the hepatic PL, as well as prostaglandin (PG) levels in Astyanax altiparanae females. Fish were collected in reservoirs with different eutrophication degrees: Jundiai (Ju) reservoir and EmbuGuacu (EG) branch, considered as mesotrophic points, and Barragem (Ba) and Aracati (Ar), branches from Guarapiranga reservoir, considered as supereutrophic and hypereutrophic points, respectively. The FA profile of the liver PL was analyzed by gas chromatography, and the concentration of liver PGE2 was analyzed using EUSA immunoassay kits. The degree of eutrophication did not alter the PG concentration and produced few modifications in the FA profile of hepatic PL. Fish collected at Ba and EG presented similar FA profiles, both with high percentages of n3 HUM especially DHA, in comparison to fish from Ju. However, no change was observed in the n3 HUFA profile of the fish from Ar. These data demonstrated that the FA profile in A. altiparanae seems to be more related to different physiological requirements of n3 HUFA of the species than eutrophication. So, this study contributed to findings on the trophic transfer dynamics in tropical freshwater reservoirs, where a direct effect of eutrophication on the availability of HUFA n3 to animals is not suggested. (C) 2020 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 16/07363-0 - Influence of reservoirs eutrophication in the trophic transfer of fatty acids to omnivorous fish
Grantee:ALINE DAL OLIO GOMES
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 17/15662-0 - Influence of eutrophication on the fatty acid profile of phospholipids in fish of different feeding habits
Grantee:Victor Hugo Marques Lorenti
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 14/16320-7 - Impacts of climate/environmental change on the fauna: an integrative approach
Grantee:Carlos Arturo Navas Iannini
Support Opportunities: Research Program on Global Climate Change - Thematic Grants
FAPESP's process: 17/11530-1 - Physiological adjustments of tropical teleosts in anthropogenic reservoirs
Grantee:Renata Guimarães Moreira Whitton
Support Opportunities: Regular Research Grants