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Title: Chronic copper exposure and fatty acid composition of the amphipod Dikerogammarus villosus: Results from a field study
Authors: Maazouzi, Chafik
Masson, Gérard
Izquierdo, Maria Soledad 
Pihan, Jean Claude
UNESCO Clasification: 251092 Acuicultura marina
Keywords: Copper
Dikerogammarus villosus
Fatty acids
Freshwater ecosystem
Issue Date: 2008
Publisher: 0269-7491
Journal: Environmental Pollution 
Abstract: Field study allows assessment of long-term effects on fatty acid (FA) composition of organisms under chronic exposure to metals. One expected effect of copper is peroxidation of lipids and essentially polyunsaturated fatty acids (PUFA). FA analysis was established for the amphipod Dikerogammarus villosus subjected to different degrees of copper exposure (4–40 μg Cu L−1). A previous study in our team showed that this species regulates its body Cu concentration (106–135 mg Cu kg−1 dry weight). Despite the high capacity of bioaccumulation, the absence of a correlation between copper concentration in D. villosus and water prevents its use as bioindicator of copper pollution. Both sexes from the most polluted site showed the lowest total FA content, but the highest PUFA percent, mainly of the long-chained variety (C20–C22). Mechanisms leading to the prevention of lipid peroxidation in this species were discussed (metallothioneins and intracellular granules) and proposed with support from literature data.
ISSN: 0269-7491
DOI: 10.1016/j.envpol.2007.12.010
Source: Environmental Pollution [ISSN 0269-7491], v. 156, p. 221-226
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