Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 73, Issue 5, Pages 805-816Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2010.02.020
Keywords
Oxidative stress; Fish; Coastal lagoon; Temporal variability; Organ specificities; Obidos lagoon
Categories
Funding
- Fundacao para a Ciencia e a Tecnologia (FCT) [SFRH/BD/17616/2004]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/17616/2004] Funding Source: FCT
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Moderate contamination scenarios are nowadays challenging ecotoxicologists. An investigative biomonitoring study was performed under those environmental conditions (Obidos lagoon, Portugal) focused on oxidative stress and accumulated metals in Liza aurata liver and kidney, also examining winter-summer variations and organ-specificities. Three sites were surveyed: Barrosa; Bom-Sucesso; Middle lagoon. The higher metal availability at Barrosa (in water and sediment) was reflected in both organ burdens, though liver was more responsive. Oxidative stress (both organs) pointed to a pro-oxidant challenge at Barrosa (both seasons), reinforced by a general stress index. In winter, oxidative stress at Barrosa was related with accumulated metals in both organs, while in summer this cause-effect relationship was only established for kidney since changes in liver were linked with non-contaminant related variables. Winter-summer variations were outstanding in liver and kidney oxidative stress endpoints, pointing to the relevance of considering distinct seasons and organs in the assessment of moderately contaminated systems. (C) 2010 Elsevier Inc. All rights reserved.
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