Selenium in Cichla melaniae in Areas Influenced by the Belo Monte Hydroelectric Power Plant, Xingu River, Amazon

Autores

  • Luziane Barbosa Macedo Universidade Federal do Pará (UFPA), Altamira, PA, Brazil
  • Thaís Pereira Nascimento Instituto de Investigaciones Marinas y Costeras (IIMYC, CONICET), Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
  • Hildegard Silva Holanda Universidade Federal do Pará (UFPA), Altamira, PA, Brazil
  • Marcelo de Oliveira Lima Instituto Evandro Chagas, Ananindeua, PA, Brazil
  • Tatiana da Silva Pereira Universidade Federal do Pará (UFPA), Altamira, PA, Brazil

DOI:

https://doi.org/10.5132/eec.2025.01.06

Palavras-chave:

Amazon, Bioaccumulation, Bioconcentration, Sediment, tissues

Resumo

Selenium (Se) is an essential micronutrient but can be toxic to fish at elevated concentrations. Studies have shown that the construction of hydroelectric dams increases the presence of toxic elements in reservoir areas. This study was conducted in March 2019 (Amazon flood season) and October 2020 (Amazon dry season) at four sites influenced by the Belo Monte Hydroelectric Plant. Conductivity showed a correlation with Se concentrations in the tissues of Cichla melaniae, as well as standard length (SL), particularly in the liver and muscle. During the flood season, significant differences in Se concentrations were observed between sites L1 and L3, L1 and L4, L2 and L3, and L2 and L4 (p<0.01). Differences were also found between gills and liver, and between liver and muscle (p<0.01). During the dry season, concentrations varied significantly across tissues (p<0.01). A comparative analysis between the seasons indicated higher Se concentrations during the flood season. The liver exhibited the highest concentrations in both seasons, especially at the reservoir site (L2) and the reference site (L1). These findings underscore the influence of seasonal factors on Se concentrations and highlight the need for continuous monitoring in areas impacted by hydroelectric plant.

Downloads

Publicado

2025-12-21

Como Citar

Macedo, L. B., Nascimento, T. P., Holanda, H. S., Lima, M. de O., & Pereira, T. da S. (2025). Selenium in Cichla melaniae in Areas Influenced by the Belo Monte Hydroelectric Power Plant, Xingu River, Amazon. Ecotoxicology and Environmental Contamination, 20(1), 58–67. https://doi.org/10.5132/eec.2025.01.06

Edição

v. 20 n. 1 (2025):

Seção

Artigos

Licença

Copyright (c) 2025 Ecotoxicology and Environmental Contamination

Creative Commons License
Este trabalho está licenciado sob uma licença 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.