Effects of inorganic and organic pollution on development of Steindachneridion melanodermatum from the Iguaçu river, Brazil.

Autor: Barreto LS; Laboratório de Toxicologia Celular, Departamento de Biologia Celular, Universidade Federal do Paraná, CEP, 81531-970, Curitiba, Paraná, Brazil; Programa de Pós-Graduação em Ecologia e Conservação, Setor de Ciências Biológicas, Universidade Federal do Paraná, CEP, 81531-980, Curitiba, Paraná, Brazil. Electronic address: luizabarreto@ufpr.br., de Souza TL; Laboratório de Toxicologia Celular, Departamento de Biologia Celular, Universidade Federal do Paraná, CEP, 81531-970, Curitiba, Paraná, Brazil; Programa de Pós-Graduação em Biologia Celular e Molecular, Setor de Ciências Biológicas, Universidade Federal do Paraná, CEP, 81531-980, Curitiba, Paraná, Brazil., de Morais TP; Programa de Pós-Graduação em Ecologia e Conservação, Setor de Ciências Biológicas, Universidade Federal do Paraná, CEP, 81531-980, Curitiba, Paraná, Brazil., de Souza AC; Centro de Estudos do Mar, Universidade Federal do Paraná, CEP, 83255-976, Pontal do Paraná, Paraná, Brazil; Instituto Oceanográfico, Universidade de São Paulo, CEP, 05508-120, São Paulo, SP, Brazil., Martins CC; Centro de Estudos do Mar, Universidade Federal do Paraná, CEP, 83255-976, Pontal do Paraná, Paraná, Brazil; Instituto Oceanográfico, Universidade de São Paulo, CEP, 05508-120, São Paulo, SP, Brazil., Oliveira A; Departamento de Química, Setor de Ciências Exatas, Centro Politécnico, Universidade Federal do Paraná, CEP, 81531-980, Curitiba, Paraná, Brazil., de Oliveira Ribeiro CA; Laboratório de Toxicologia Celular, Departamento de Biologia Celular, Universidade Federal do Paraná, CEP, 81531-970, Curitiba, Paraná, Brazil.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2024 Sep; Vol. 364, pp. 143193. Date of Electronic Publication: 2024 Aug 27.
DOI: 10.1016/j.chemosphere.2024.143193
Abstrakt: The Iguaçu River basin, known for its rich endemic ichthyofauna, faces a significant threat from chemical pollution. The Jordão River, a major tributary, drains extensive agricultural and livestock areas and receives poorly treated domestic and industrial effluents before joining the Iguaçu River. This study investigated the pollution and toxic effects of water samples from the Iguaçu upstream (UI), Jordão (JR), and their confluence (DI) on Steindachneridion melanodermatum embryos and larvae. Chemical analyses of the water samples revealed that most contaminants were present at levels below detection limits or within the limits established by Brazilian legislation. However, cadmium in UI, aluminum in JR, and lead in DI exceeded the legal limits. Exposure up to 96 h post-fertilization revealed higher mortality and deformity rates in individuals exposed to water samples from UI and JR, despite JR having fewer detected pollutants. JR and DI samples induced increased superoxide dismutase activity, indicating activation of the antioxidant defense system due to xenobiotic exposure. Overall, the integrated biomarker response indexes showed that individuals exposed to JR water displayed the most significant variations in their responses compared to the control treatment, suggesting a higher level of contamination and toxicity. Although a direct link between water quality and toxicity in the Jordão and Iguaçu Rivers was inconclusive, the results confirmed pollution and risks to local wildlife. The study highlighted the harmful effects of pollutants, even at low concentrations. These findings underscore the need for conservation measures to safeguard endemic and endangered species in the Iguaçu River basin. Understanding pollutant effects on native species is crucial for effective mitigation strategies and ecological health preservation.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: