Data/hora: 17/06/2024 03:28:27

Provedor de dados: | 36
País: | Brazil
Título: | Acute toxicity of a deltamethrin based pesticide (DBP) to the Neotropical electric fish Microsternarchus cf. bilineatus (Gymnotiformes)
Autores: | CHAVES,Valesca de Souza; MARCON,Jaydione Luiz; DUNCAN,Wallice Paxiúba; ALVES-GOMES,José Antônio.
Data: | 2020-12-01
Ano: | 2020
Palavras-chave: | Pyrethroid insecticide; Biomarkers; Median LC50; Glutathione-S-transferase; Acetylcholinesterase.
Resumo: | ABSTRACT Deltamethrin is a pyrethroid insecticide widely used in pest control in Brazilian agriculture. The intensive and disordered use of this pesticide in the Amazon region can drive it into aquatic ecosystems in several ways, but mainly by runoff and leaching. The present study was conceived to determine the acute toxicity (LC50) of a deltamethrin based pesticide (DBP) and to characterize its effects on two biochemical biomarkers, glutathione-S-transferase (GST) and acetylcholinesterase (AChE), in tissues of the electric fish Microsternarchus cf. bilineatus. Fishes were exposed to concentrations of 1, 2, 3, 4 and 5 μg L-1 of DBP for up to 96 hours. For each treatment, the absolute activity of the enzymes GST (muscle and liver) and AChE (muscle and nervous tissue) were analyzed. The LC50-96 h for Microsternarchus cf. bilineatus was 2.15 μg L-1, the lowest concentration registered for an Amazonian fish species so far. None of the concentrations tested of this insecticide affected AChE activity for the exposure period tested. A significant increase in muscle GST activity was detected only for concentrations of 2 and 3 μg L-1.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000400355
Editor: | Instituto Nacional de Pesquisas da Amazônia
Relação: | 10.1590/1809-4392201904001
Formato: | text/html
Fonte: | Acta Amazonica  v.50 n.4 2020
Fonte: | info:eu-repo/semantics/openAccess