Effects of sewage discharges on lipid and fatty acid composition of the Patagonian bivalve Diplodon chilensis

MARINE POLLUTION BULLETIN

卷:79

Article

Rocchetta, Iara^1,3  Pasquevich, Maria Y.²  Heras, Horacio²  del Carmen Rios de Molina, Maria¹  Luquet, Carlos M.³ 

[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Quim Biol, INQUIBICEN,CONICET, RA-1428 Buenos Aires, DF, Argentina

[2] Univ Nacl La Plata, CONICET CCT La Plata, Fac Ciencias Med, Inst Invest Bioquim Plata INIBIOLP, RA-1900 La Plata, Buenos Aires, Argentina

[3] UNCo, CONICET, INIBIOMA, Lab Ecotoxicol Acuat,CEAN, RA-8371 Junin De Los Andes, Neuquen, Argentina

关键词: Freshwater bivalve;    Pollution;    Domestic effluents;    Oxidative stress;    Lipofuscins;    Fatty acid markers;   

DOI  :  10.1016/j.marpolbul.2013.12.011

来源: Elsevier

【 摘 要 】

Lipid and fatty acid (FA) composition and selected oxidative stress parameters of freshwater clams (Dipolodon chilensis), from a sewage-polluted (SMA) and a clean site, were compared. Trophic markers FA were analyzed in clams and sediment. Saturated FA (SAFA), and bacteria and sewage markers were abundant in SMA sediments, while diatom markers were 50% lower. Proportions of SAFA, branched FA, 20:5n - 3 (EPA) and 22:6n - 3 (DHA) were higher in SMA clams. Chronic exposure of D. chilensis to increasing eutrophication affected its lipid and FA composition. The increase in EPA and DHA proportions could be an adaptive response, which increases stress resistance but could also lead to higher susceptibility to lipid peroxidation TSARS, lipofuscins (20-fold) and GSH concentrations were higher in SMA clams. FA markers indicated terrestrial plant detritus and bacteria are important items in D. chilensis diet. Anthropogenic input in their food could be traced using specific FA as trophic markers. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

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