Responses of European eel (Anguilla anguilla L.) in two polluted environments: in situ experiments

Ecotoxicology and Environmental Safety
M TelesM Pacheco

Abstract

European eels (Anguilla anguilla L.) were caged for 8 and 48 h in two polluted areas to assess the contamination cleanup process in the Vouga River 2 years after the official closing of a bleached kraft pulp mill effluent (BKPME; experiment 1), and to monitor the effects induced by contaminated offward fishing harbor waters (experiment 2). Plasma cortisol, glucose, and lactate were evaluated as stress responses. In experiment 1, plasma cortisol, glucose, and lactate increased after 8 h of exposure in site 3, which is located farthest from the deactivated sewage outlet. However, A. anguilla seemed to adapt after 48 h of exposure in site 3, because all three parameters returned to control levels. Plasma glucose also significantly increased after 8 h of exposure at sites 1, 2, and 3, returning to control levels after 48 h. Plasma lactate levels increased after 8 h of exposure at site 3 and after 48 h of exposure at site 1. In experiment 2, A. anguilla exposed to contaminated harbor waters increased their plasma lactate after 8 and 48 h of exposure, whereas their cortisol and glucose plasma were elevated only after 48 h of exposure. The results demonstrate that even 2 years after the official closing of the BKPME sewage outlet, the...Continue Reading

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Citations

Jan 25, 2008·Archives of Environmental Contamination and Toxicology·F A PalermoA M Polzonetti-Magni
Aug 15, 2006·Journal of Toxicology and Environmental Health. Part a·Michael R van den HeuvelLouis A Tremblay
Oct 3, 2013·Environmental Science and Pollution Research International·Ulrike KammannReinhold Hanel
Apr 6, 2011·Ecotoxicology and Environmental Safety·M OliveiraM A Santos
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Dec 23, 2020·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Imen Ben AmmarPatrick Kestemont
Jan 1, 2006·Environmental Toxicology and Pharmacology·Marina M P Camargo, Cláudia B R Martinez

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