The Choice of Benthic Amphipod for Ecotoxicological Tests with Marine Sediments
Resumen
Recently, the ABNT-NBR 15638 standard was published normalizing the method of ecotoxicological test with whole sediment using the benthic amphipods Leptocheirus plumulosus and Tiburonella viscana. These test organisms are the most widely used for this matrix in studies of Brazilian marine and estuarine environments. In order to analyse some experimental conditions in toxicity tests with these two amphipods, data from a monitoring program conducted in the oceanic region of Santos-SP were compiled. The results of ecotoxicological tests with Leptocheirus plumulosus and Tiburonella viscana indicated that sediments in the region have low contamination levels. The precision within replicates used in the tests showed that the coefficient of variation was similar (CV = 22%) for both amphipods, however, there was a weak explanation with the intensity of the toxic effect in the Tiburonella viscana test. Regression analysis indicated significant correlation among the intensity of the toxic effect to Tiburonella viscana and the concentration of N-Kjeldahl, and also the proportion of silt+clay in sediments, which did not occur to Leptocheirus plumulosus. Based on present study and others, it was possible to estimate that survival of Tiburonella viscana is affected in sediments with low levels of contamination, but more than 33% of silt+clay (fines).
Keywords: Amphipod, Leptocheirus plumulosus, Sediment, Silt+clay, Tiburonella viscana.
Descargas
Descargas
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.
