Toxicity of fipronil and 2,4-D formulations (alone and in a mixture) to the tropical amphipod Hyalella meinerti

Autor(es)

da Silva Pinto, Thandy Junio ^{[1, 2]} ; Moreira, Raquel Aparecida ^{[1, 2]} ; da Silva, Lais Conceicao Menezes ^{[1, 2]} ; Yoshii, Maria Paula Cardoso ^{[1, 2]} ; Goulart, Bianca Veloso ^[3] ; Fraga, Priscille Dreux ^{[1, 2]} ; da Silva Rolim, Victor Luiz ^{[1, 2]} ; Montagner, Cassiana Carolina ^[3] ; Daam, Michiel Adriaan ^[4] ; Espindola, Evaldo Luiz Gaeta ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Sch Engn, PPG SEA, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos - Brazil

^[2] Univ Sao Paulo, Sao Carlos Sch Engn, NEEA CRHEA SHS, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos - Brazil

^[3] Univ Estadual Campinas, Inst Chem, Analyt Chem Dept, Campinas, SP - Brazil

^[4] Univ Nova Lisboa, Fac Sci & Technol, Dept Environm Sci & Engn, CENSE, P-2829516 Quinta Da Torre, Caparica - Portugal

• Tipo de documento: Artigo Científico
• Fonte: Environmental Science and Pollution Research; v. 28, n. 28, p. 38308-38321, JUL 2021.
• Citações Web of Science: 0

Resumo

Conventional farming uses a large volume of pesticides that may reach aquatic ecosystems. This is also the case for the insecticide fipronil and the herbicide 2,4-D, which are widely used in many crops. This study aimed at evaluating the individual and mixture toxicity of these pesticides to the tropical amphipod Hyalella meinerti. To this end, acute toxicity tests (96 h) were conducted. Chronic bioassays (10 days) were also carried out, in which the body length and dry biomass were evaluated as endpoints. In addition, a complete factorial mixture chronic toxicity test was carried out. H. meinerti was sensitive to fipronil in the acute toxicity tests, with a LC50-96-h of 0.86 mu g L-1 (95% CI 0.26-0.46), and no acute effects were observed after 2,4-D exposure even at the highest test concentration of 100 mg L-1. In the chronic toxicity tests, all tested concentrations of both pesticides decreased the growth of H. meinerti, in which losses on biomass reached 45% and 65% for 2,4-D and fipronil, respectively. The pesticide mixture indicated antagonism although it still significantly decreased the body growth. The results obtained indicate a high sensitivity of H. meinerti exposed to environmentally realistic concentrations, demonstrating that there are risks for the species in real field conditions. (AU)

• Processo FAPESP: 17/24126-4 - Efeitos dos pesticidas fipronil e 2,4-d isoladamente e em mistura, sobre espécies nativas da biota aquática neotropical
• Beneficiário: Raquel Aparecida Moreira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
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• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático