Data/hora: 05/06/2024 03:19:44

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