Comparative study of the abamectin and difenoconazole toxic effects in embryos and adults of Danio rerio

• Grant number: 17/05543-3
• Support type: Scholarships abroad - Research Internship - Doctorate
• Effective date (Start): June 05, 2017
• Effective date (End): October 04, 2017
• Field of knowledge: Biological Sciences - Biochemistry - Metabolism and Bioenergetics
• Principal researcher: Evaldo Luiz Gaeta Espindola
• Grantee: Ana Leticia Madeira Sanches
• Supervisor abroad: Paula Ines Borralho Domingues
• Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Research place: Universidade de Aveiro (UA), Portugal
• Associated to the scholarship: 14/14621-0 - Analysis of the environmental effects of Kraft and score pesticides and its active ingredients abamectin and difenoconazole in tropical surface waters by biomarkers, BP.DR

Abstract

There are many agrochemicals used in agriculture among them Kraft 36EC® which has abamectin as its active ingredient and Score 250EC®, active ingredient diphenoconazole. They are compounds widely used in strawberry crops in regions of tropical climate, and despite that they are classified as extremely toxic and very dangerous to the environment. The use of the fish as test organisms stands out in ecotoxicology due to their representative importance and critical role in aquatic food webs. Due to ethical issues and in order to reduce costs, space and waste generated, alternative methods using fish embryos are currently widely used. FET - Fish Embryo Toxicity Test already has many followers, but the sensitivity of this test, compared to adult organisms, is often questioned. Studies show that the sensitivity of the different stages of life of the Danio rerio depends on the characteristics of the compounds and their interactions. Little is known about the causes of sensitivity differences between the life stages of an organism, and to better understand the toxicokinetics of the different compounds, it is recommended that the toxicity of the chemicals be tested on embryos, juveniles and / or adults. Considering the ecological risks inherent to the use of the insecticide abamectin and the fungicide difenoconazole, the main objective of this research is to evaluate the effect generated in Danio rerio embryos exposed to isolated pesticides and in mixtures, and to compare these results by means of statistical correlations with the sensitivity of tests previously performed using adults of Danio rerio.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MEIRELES, GABRIELA; DAAM, MICHIEL A.; MADEIRA SANCHES, ANA LETICIA; ZANONI, MARIA V. B.; SOARES, AMADEU M. V. M.; GRAVATO, CARLOS; DE OLIVEIRA, DANIELLE P.. Red disperse dyes (DR 60, DR 73 and DR 78) at environmentally realistic concentrations impact biochemical profile of early life stages of zebrafish (Danio rerio). Chemico-Biological Interactions, v. 292, p. 94-100, AUG 25 2018. (17/05543-3, 14/14621-0, 16/03281-9)

MADEIRA SANCHES, ANA LETICIA; DAAM, MICHIEL ADRIAAN; FREITAS, EMANUELA CRISTINA; GODOY, ALINE ANDRADE; MEIRELES, GABRIELA; ALMEIDA, ANA RITA; DOMINGUES, INES; GAETA ESPINDOLA, EVALDO LUIZ. Lethal and sublethal toxicity of abamectin and difenoconazole (individually and in mixture) to early life stages of zebrafish. Chemosphere, v. 210, p. 531-538, NOV 2018. (17/05543-3, 14/14621-0)