Low concentration of 2,4,6-tribromophenol (TBP) represents a risk to South American silver catfish Ramdia quelen (Quoy and Gaimard, 1824) population.

Autor: Folle NMT; Departamento de Biologia Celular, Universidade Federal do Paraná, Caixa Postal 19031, CEP 81531-970, Curitiba, PR, Brazil., Azevedo-Linhares M; Centro de Tecnologia em Saúde e Meio Ambiente, Instituto de Tecnologia do Paraná, CEP 81350-010, Curitiba, PR, Brazil., Garcia JRE; Estação de Piscicultura Panamá, Est. Geral Bom Retiro. Paulo Lopes - SC, CEP 88490-000, Brazil., Souza ATDC; Pós-graduação em Ecologia e Conservação, Setor de Ciências Biológicas, Universidade Federal do Paraná, CEP 81531-990, Curitiba, PR, Brazil., Grötzner SR; Departamento de Biologia Celular, Universidade Federal do Paraná, Caixa Postal 19031, CEP 81531-970, Curitiba, PR, Brazil., Oliveira EC; Universidade Tecnológica do ParanáCampus Dois Vizinhos, CEP 85660000, Dois Vizinhos, PR, Brazil., Paulin AF; Centro de Tecnologia em Saúde e Meio Ambiente, Instituto de Tecnologia do Paraná, CEP 81350-010, Curitiba, PR, Brazil., Leite NF; Centro de Tecnologia em Saúde e Meio Ambiente, Instituto de Tecnologia do Paraná, CEP 81350-010, Curitiba, PR, Brazil., Filipak Neto F; Departamento de Biologia Celular, Universidade Federal do Paraná, Caixa Postal 19031, CEP 81531-970, Curitiba, PR, Brazil., Oliveira Ribeiro CA; Departamento de Biologia Celular, Universidade Federal do Paraná, Caixa Postal 19031, CEP 81531-970, Curitiba, PR, Brazil. Electronic address: ciroolivrib@gmail.com.
Jazyk: angličtina
Zdroj: Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2020 Jan 15; Vol. 187, pp. 109815. Date of Electronic Publication: 2019 Oct 31.
DOI: 10.1016/j.ecoenv.2019.109815
Abstrakt: The 2,4,6-tribromophenol (TBP) is an environmental persistent pollutant widely used as flame retardant, antimicrobial and insecticide agent in wood preservation and plastic production. Currently, TBP is found in environmental compartments such as soil, freshwater, groundwater, sewage sludge and domestic dust, but the effects to biota and the risk of exposure to aquatic vertebrates are still scarce. In the present study, Rhamdia quelen fish embryos (8 h post-fertilization - hpf) were exposed to 0.3 and 3.0 μg L -1 of TBP until 96 hpf. Biochemical biomarkers, hatching, survival and larvae/embryo malformations were evaluated after exposure. Additionally, a mathematical model was proposed to evaluate the effects along further generations. The results showed that TBP decreased the survival level but did not cause significant difference in the hatching rates. After 72 and 96 hpf, individuals from the highest tested concentration group showed more severe malformations than individuals from control and the lower concentrations groups. The deformities were concentrated on the embryos facial region where the sensorial structures related to fish behavior are present. The biochemical biomarkers revealed both oxidative stress and neurotoxicity signs after exposure to the contaminant, while the application of the mathematical model showed a decrease of population in both tested TBP concentrations. In conclusion, the current results demonstrated that TBP is toxic to R. quelen embryos and represents a risk to population after early life stage exposure.
(Copyright © 2019 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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