Review of the Protocol and Sensibility of the Tanaid Kalliapseudes schubartii in Tests Conducted With Reference Toxicants
DOI:
https://doi.org/10.5132/jbse.2009.01.003Keywords:
Kalliapseudes schubartii, sediment, tanaidacea, reference toxicantAbstract
Since CONAMA resolution 344 (2004), which regulates the levels of contaminants in dredged material, the evaluation of the quality of sediments has received increased attention in Brazil in an attempt to establish standards for test protocols applied to benthic organisms and to investigate the sensitivity of this species. Regarding this issue, the present investigation had to main objectives. Firstly, to review test protocols for acute toxicity using the tanaidacea Kalliapseudes schubartii, and secondly to investigate the sensitivity of this species for reference toxicants usually employed in the marine ecotoxicology. Sensitivity experiments were carried out with the substances Zn, Cd, DSS (sodium dodecyl sulfate) and NH3 in two salinity conditions (group 1: salinity 15 and group 2: local salinity 5.7; 7.3; 8.5; 10 e 21). In these experiments, mortality and mobility were assessed. Based on the threshold EC50 and LC50, six days were needed to observe significant mobility effects, while seven days were needed to observed significant mortality effects. For zinc, in tests with individuals acclimatized in salinity 15 (group 1) there were found results with higher reproducibility. For group 1, were obtained LC50 (7 days): Zn = 7.75 mg L–1 ; Cd = 0.29 mg L–1; DSS = 12.12 mg L–1 and non-ionized ammonia = 3.16 mg L–1. The results obtained to group 2 demonstrated that the acclimatization process of the organisms must interfere in their sensitivity, but, without a well defined visible pattern. The mobility as end point was less precise and therefore did not present advantages on the use of the mortality. In tests intended to evaluate the quality of the sediment, tanaids were generally found to be less sensitive than other organisms. However, using tanaids presented some advantages such as their wide salinity tolerance, preference for fine sediments, and high resistance to non-ionized ammonia.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2009 Ecotoxicology and Environmental Contamination
This work is licensed under a Creative Commons Attribution 4.0 International License.
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.
