Analysis of Cholinesterase Enzyme Activity in Rineloricaria kronei from Coastal Rivers in Southern Brazil
Resumen
Levels of environmental pollution are commonly assessed via biomarkers, one of which is the activity of the cholinesterase enzyme. This study analyzed activity of cholinesterase in muscles samples of Rineloricaria kronei fish in order to assess levels of anticholinesterasic pollution in coastal rivers of the Serra do Mar mountain range in southern Brazil. A total of 93 specimens were collected at six sites along the Caiuru, Pinto and Sambaqui rivers between August and November 2007. Specimens were collected via electrofishing, with a sampling effort of 50m/hour. Cholinesterase enzyme (ChE) activity was measured in extracted muscles in the laboratory and the results analyzed using one-factor ANOVA, followed by Dunnett’s test. ChE activity at sites 2, 3 and 4 was similar to that observed in control specimens. Mean activity was lower than the control (p<0.05) at Site 1 (4.6+1.5) and highest at Site 5 (98.7±16.2). Site 5 appears likely to be contaminated with heavy metals, based on the increased activity of the cholinesterase enzyme. This study suggests that the cholinesterase biomarker can be used not only to demonstrate the presence of organophosphate and carbamate pesticides, but also to indicate the presence of heavy metals.
Descargas
Descargas
Publicado
Cómo citar
Número
Sección
Licencia
Copyright © 2006 ECOTOX-Brasil
Copyright notice: It is a condition for publication that manuscripts submitted to this journal have not yet been published and will not be simultaneously submitted or published elsewhere. By submitting a manuscript, the authors agree that copyright for their article is transferred to the Sociedade Brasileira de Ecotoxicologia (ECOTOX-Brasil) if and when the article is accepted for publication. The copyright covers the exclusive rights to reproduce and distribute articles, including reprints, photographic reproductions or any other reproduction of a similar nature, including translations. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without permission of the publisher.
Notice: While every effort is made by the EEC, editors and editorial board to see that no inaccurate or misleading data, opinions or statements appear in this journal, they wish to make it clear that the contents of the articles and advertisements published herein are the sole responsibility of the contributors or advertisers concerned. Accordingly, the EEC, the editorial board and editors and their respective employees, officers and agents accept no responsibility or liability whatsoever for the consequences of any inaccurate or misleading data, opinion or statement.
