PUBLICATION
Fipronil and 2,4-D effects on tropical fish: Could avoidance response be explained by changes in swimming behavior and neurotransmission impairments?
- Authors
- Moreira, R.A., Araújo, C.V.M., Junio da Silva Pinto, T., Menezes da Silva, L.C., Goulart, B.V., Viana, N.P., Montagner, C.C., Fernandes, M.N., Gaeta Espindola, E.L.
- ID
- ZDB-PUB-200822-28
- Date
- 2020
- Source
- Chemosphere 263: 127972 (Journal)
- Registered Authors
- Keywords
- Acetylcholinesterase, Danio rerio, Habitat disturbance, Hyphessobrycon eques, Pesticides
- MeSH Terms
-
- 2,4-Dichlorophenoxyacetic Acid/toxicity*
- Acetylcholinesterase/metabolism
- Animals
- Behavior, Animal/drug effects*
- Brazil
- Herbicides/pharmacology
- Insecticides/toxicity
- Pesticides/toxicity
- Pyrazoles/chemistry*
- Swimming
- Synaptic Transmission
- Water Pollutants, Chemical/toxicity*
- Zebrafish/metabolism
- Zebrafish/physiology
- PubMed
- 32822938 Full text @ Chemosphere
Citation
Moreira, R.A., Araújo, C.V.M., Junio da Silva Pinto, T., Menezes da Silva, L.C., Goulart, B.V., Viana, N.P., Montagner, C.C., Fernandes, M.N., Gaeta Espindola, E.L. (2020) Fipronil and 2,4-D effects on tropical fish: Could avoidance response be explained by changes in swimming behavior and neurotransmission impairments?. Chemosphere. 263:127972.
Abstract
Brazil is the largest producer of sugarcane, a crop largely dependent on chemical control for its maintenance. The insecticide fipronil and herbicide 2,4-D stand out among the most commonly used pesticides and, therefore, environmental consequences are a matter of concern. The present study aimed to investigate the toxicity mechanisms of Regent® 800 WG (a.i. fipronil) and DMA® 806 BR (a.i. 2,4-D) pesticides using forced and non-forced exposures through an integrative approach: firstly, to assess whether contamination by fipronil and 2,4-D can trigger the avoidance behavior of the fish Danio rerio (zebrafish) and Hyphessobrycon eques (serpae tetra or mato-grosso). Additionally, the effects on fish were analyzed considering the swimming behavior together with a biomarker of neurotoxicity, the activity of acetylcholinesterase (AChE). In avoidance tests with pesticide gradients, D. rerio avoided the highest concentrations of the two compounds and H. eques avoided only the highest concentration of 2,4-D. The swimming behavior (distance moved) was reduced and AChE was inhibited when D. rerio was exposed to fipronil. The 2,4-D affected the swimming (maximum speed) of H. eques, but AChE was not altered. Avoidance response seemed not to have been affected by possible effects of contaminants on swimming behavior and Ache activity. This study showed the importance of knowing the avoidance capacity, swimming behavior and neurotoxic effects of pesticides on fish in an integrated and realistic context of exposure in environments contaminated with pesticides and can be useful as ecologically relevant tools for ecological risk assessment.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping