Lethal toxicity of the herbicides acetochlor, ametryn, glyphosate and metribuzin to tropical frog larvae

Autor(es)

Daam, Michiel A. ^[1] ; Moutinho, Mariana F. ^[2] ; Espindola, Evaldo L. G. ^[3] ; Schiesari, Luis ^[4]

Afiliação do(s) autor(es)

^[1] Univ Nova Lisboa, Fac Sci & Technol, Dept Environm Sci & Engn, CENSE, P-2829516 Quinta Da Torre, Caparica - Portugal

^[2] Univ Sao Paulo, Inst Biociencias, Programa Posgrad Ecol, Sao Paulo - Brazil

^[3] Univ Sao Paulo, Sao Carlos Engn Sch, NEEA, CRHEA, SHS, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos, SP - Brazil

^[4] Univ Sao Paulo, Escola Artes Ciencias & Humanidades, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ECOTOXICOLOGY; v. 28, n. 6, p. 707-715, AUG 2019.
• Citações Web of Science: 0

Resumo

Despite the high amphibian biodiversity and increasing pesticide use in tropical countries, knowledge on the sensitivity of tropical amphibians to pesticides remains limited. The aim of this study was to evaluate the acute toxicity of the active ingredients of four of the main herbicides used in Brazilian sugarcane production to tadpoles of two tropical frog species: Physalaemus cuvieri and Hypsiboas pardalis. The calculated 96h-LC50 (median lethal concentration; in mg a.s./L) values for P. cuvieri and H. pardalis were 4.4 and 7.8 (acetochlor); 15 and <10 (ametryn); 115 and 106 (glyphosate); and 85 and 68 (metribuzin), respectively. These toxicity values demonstrated little interspecies variation and the toxicity of the herbicides appeared to be at least partly related with the respective octanol-water coefficient. Published acute toxicity data of fish and amphibians for herbicides were also compiled from the US-EPA ECOTOX database. These data indicated little difference in herbicide sensitivity between tropical amphibians and both non-tropical amphibians and fish. These findings indicate that temperate (fish and amphibian) herbicide toxicity data are also protective for tropical amphibians. Constraints in such extrapolations and indications for future research are discussed. (AU)

• Processo FAPESP: 08/57939-9 - Impactos da expansão da agroindústria da cana-de-açúcar sobre comunidades aquáticas
• Beneficiário: Luis Cesar Schiesari
• Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Apoio a Jovens Pesquisadores
• Processo FAPESP: 11/05280-6 - Ecotoxicidade comparativa de pesticidas usados em plantações de cana-de-açúcar sobre larvas de anfíbios
• Beneficiário: Mariana Fekete Moutinho
• Linha de fomento: Bolsas no Brasil - Mestrado
• Processo FAPESP: 15/18790-3 - Consequências ambientais da conversão pastagem-cana-de-açúcar e intensificação de pastagens
• Beneficiário: Luiz Antonio Martinelli
• Linha de fomento: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático