Avoidance responses by Danio rerio reveal interactive effects of warming, pesticides and their mixtures

Autor(es)

Moreira, Raquel A. ; Cordero-De-Castro, Andrea ; Polo-Castellano, Curro ; Pinto, Thandy J. S. ; Dias, Mariana A. ; Montagner, Cassiana C. ; Espindola, Evaldo L. G. ; Araujo, Cristiano V. M. ; Blasco, Julian

• Tipo de documento: Artigo Científico
• Fonte: Science of The Total Environment; v. 847, p. 9-pg., 2022-07-28.

Resumo

Temperature variations and thermal extremes events caused by climate change can have profound implications for the toxicity of pesticides in aquatic organisms. Using an innovative system (Heterogeneous Multi-Habitat Test System HeMHAS) that allows the simulation of different scenarios within a spatially heterogeneous landscape, the effects on the habitat selection of Danio rerio fish caused by the pesticides fipronil and 2,4-D were studied as single compounds and in mixture and integrated with air temperature variation (20, 24 and 28 degrees C). As a result, D. rerio detected and avoided both pesticides at air temperatures of 20 and 24 degrees C; however, at 28 degrees C no significant difference was observed in habitat choice by fish. Additionally, when pesticides were mixed in a heterogeneously contaminated landscape, it was observed that D. rerio detected contamination and preferred the clean zone at 20 and 24 degrees C; however, at 28 degrees C the potential to escape from the most contaminated areas was impaired. Thus, contamination by both pesticides made the habitat selection behavior of fish at 20 and 24 degrees Cmore noticeable. In addition, the association between pesticides and temperature showed negative effects on the response of fish to detect and escape from contaminated environments, suggesting the influence of temperature in altering the ability of the organism to provide an efficient response to stress. (AU)

• Processo FAPESP: 20/16131-0 - Os efeitos dos agrotóxicos (2,4-D e Diuron), isolados e em mistura, sobre Daphnia magna e Danio rerio: uma abordagem de múltiplos parâmetros em escalas locais e de paisagem
• Beneficiário: Raquel Aparecida Moreira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• 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
• Processo FAPESP: 15/18790-3 - Consequências ambientais da conversão pastagem-cana-de-açúcar e intensificação de pastagens
• Beneficiário: Luiz Antonio Martinelli
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático