Data/hora: 12/06/2024 09:56:54

Provedor de dados: | 92
País: | Brazil
Título: | Low malathion concentrations influence metabolism in Chironomus sancticaroli (Diptera, Chironomidae) in acute and chronic toxicity tests
Autores: | Rebechi,Débora; Richardi,Vinicius S.; Vicentini,Maiara; Guiloski,Izonete C.; Assis,Helena C. Silva de; Navarro-Silva,Mário A.
Data: | 2014-09-01
Ano: | 2014
Palavras-chave: | Acetylcholinesterase; Bioindicator; Esterases; Organophosphate; Toxicity.
Resumo: | Low malathion concentrations influence metabolism in Chironomus sancticaroli (Diptera, Chironomidae) in acute and chronic toxicity tests. Organophosphate compounds are used in agro-systems, and in programs to control pathogen vectors. Because they are continuously applied, organophosphates often reach water sources and may have an impact on aquatic life. The effects of acute and chronic exposure to the organophosphate insecticide malathion on the midge Chironomus sancticaroli are evaluated. To that end, three biochemical biomarkers, acetylcholinesterase (AChE), alpha (EST-α) and beta (EST-β) esterase were used. Acute bioassays with five concentrations of malathion, and chronic bioassays with two concentrations of malathion were carried out. In the acute exposure test, AChE, EST-α and EST-β activities declined by 66, 40 and 37%, respectively, at 0.251 µg L-1 and more than 80% at 1.37, 1.96 and 2.51 µg L-1. In chronic exposure tests, AChE and EST-α activities declined by 28 and 15% at 0.251 µg L-1. Results of the present study show that low concentrations of malathion can influence larval metabolism, indicating high toxicity for Chironomus sancticaroli and environmental risk associated with the use of organophosphates.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262014000300012
Editor: | Sociedade Brasileira De Entomologia
Relação: | 10.1590/S0085-56262014000300012
Formato: | text/html
Fonte: | Revista Brasileira de Entomologia  v.58 n.3 2014
Fonte: | info:eu-repo/semantics/openAccess