Trace metal concentration, antioxidant enzyme activities and susceptibility to oxidative stress in the tricoptera larvae Hydropsyche exocellata from the Llobregat river basin (NE Spain)

Caddisfly larvae of Hydropsyche exocellata were sampled from seven locations receiving increasing levels of urban and industrial waste water discharges along the Llobregat river system (NE Spain) during spring and summer 2003. Locations were selected to include aquatic communities in poor and good e...

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Bibliographic Details
Published in:	Aquatic toxicology Vol. 74; no. 1; pp. 3 - 19
Main Authors:	Barata, C., Lekumberri, I., Vila-Escalé, M., Prat, N., Porte, C.
Format:	Journal Article
Language:	English
Published:	Amsterdam Elsevier B.V 15-08-2005 Elsevier Science
Subjects:	Animal, plant and microbial ecology Animals antioxidants Applied ecology bioaccumulation bioavailability Biological and medical sciences Biomarkers Catalase Catalase - metabolism Ecotoxicology, biological effects of pollution Environmental Monitoring enzyme activity Fresh Water Freshwater Fundamental and applied biological sciences. Psychology General aspects Glutathione peroxidase Glutathione Peroxidase - metabolism Glutathione Transferase - metabolism Glutathione- S-transferase heavy metals Hydropsyche Hydropsyche exocellata Hydropsychidae Insecta Insects Larva - chemistry Larva - enzymology Larva - physiology larvae Lipid Peroxides - metabolism macroinvertebrates Metals, Heavy - analysis oxidative stress Oxidative Stress - physiology Spain Superoxide dismutase Superoxide Dismutase - metabolism Thiobarbituric Acid Reactive Substances water pollution Water Pollution, Chemical water quality Spain Europe Spain, Cataluna, Llobregat R Glutathione peroxidase Biomarkers Superoxide dismutase Catalase Insects Glutathione- S-transferase Oxidative stress Ecotoxicology Enzyme Insecta Trichoptera Metal Glutathione-S-transferase Antioxidant Llobregat River basin Hydropsychidae Concentration measurement Trace element Aquatic environment Hydropsyche Larva Arthropoda Developmental stage Invertebrata
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Summary:	Caddisfly larvae of Hydropsyche exocellata were sampled from seven locations receiving increasing levels of urban and industrial waste water discharges along the Llobregat river system (NE Spain) during spring and summer 2003. Locations were selected to include aquatic communities in poor and good ecological state according to measured physicochemical water parameters and the analysis of benthic macroinvertebtrate communities. Whole body residues of selected metals (Fe, Al, Zn, Cu, Co, Ni, Pb, Cd) were determined in conjunction with antioxidant enzyme activities (superoxide dismutase, SOD; catalase, CAT; glutathione peroxidase activity of GST, GSTPX), a phase II enzyme (glutathione- S-transferase, GST) and lipid peroxide levels measured as thiobarbituric reactive species (TBARs) with the aim of investigating whether resident macroinvertebrate benthic species were responsive to changes in water quality. Caddisfly larvae inhabiting those rivers were exposed to increasing levels of metal pollution. Enhanced activities of two (CAT and GST) out of the four tested enzymes, coupled with increased levels of TBARs, indicated increasing levels of stress in the studied species towards downstream reaches or locations near industrial and urban areas. These results indicate that combination of chemical and biochemical responses can be used to assess and diagnose pollution in high stressed river ecosystems.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0166-445X 1879-1514
DOI:	10.1016/j.aquatox.2005.04.002