Low concentration of 2,4,6-tribromophenol (TBP) represents a risk to South American silver catfish Ramdia quelen (Quoy and Gaimard, 1824) population.
Ecotoxicol Environ Saf
; 187: 109815, 2020 Jan 15.
Article
en En
| MEDLINE
| ID: mdl-31677565
ABSTRACT
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 (8â¯h post-fertilization - hpf) were exposed to 0.3 and 3.0⯵gâ¯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.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Fenoles
/
Contaminantes Químicos del Agua
/
Bagres
/
Desarrollo Embrionario
/
Embrión no Mamífero
/
Larva
Tipo de estudio:
Etiology_studies
/
Risk_factors_studies
Límite:
Animals
País/Región como asunto:
America do sul
Idioma:
En
Revista:
Ecotoxicol Environ Saf
Año:
2020
Tipo del documento:
Article
País de afiliación:
Brasil