Functional responses of Hyalella meinerti after exposure to environmentally realistic concentrations of 2,4-D, fipronil, and vinasse (individually and in mixture)
| Autor: | Juliane Silberschmidt Freitas, Luis Schiesari, Michiel A. Daam, Laís Fernanda de Palma Lopes, Cassiana Carolina Montagner, Evaldo Luiz Gaeta Espíndola, Marina Reghini Vanderlei, Priscille Dreux Fraga, Thandy Junio da Silva Pinto, Maria Paula Cardoso Yoshii, Bianca Veloso Goulart, Allan Pretti Ogura, Raquel Aparecida Moreira, Laís Conceição Menezes da Silva, Danillo B. Athayde |
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| Rok vydání: | 2021 |
| Předmět: |
Male
Health Toxicology and Mutagenesis media_common.quotation_subject Vinasse 010501 environmental sciences Aquatic Science 01 natural sciences Mesocosm Toxicology 03 medical and health sciences chemistry.chemical_compound Hyalella Water Quality Bioassay Animals Amphipoda Pesticides Fipronil Swimming 030304 developmental biology 0105 earth and related environmental sciences media_common Waste Products 0303 health sciences biology Behavior Animal Reproduction Environmental Exposure Contamination Pesticide biology.organism_classification Survival Analysis chemistry ENGENHARIA HIDRÁULICA Pyrazoles Female 2 4-Dichlorophenoxyacetic Acid Brazil Water Pollutants Chemical |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | Sugarcane crops management in Brazil includes the use of pesticides, as well as alternative organic fertilizers such as vinasse obtained from waste of the ethanol industry. In order to assess the effects of the environmental contamination generated by such sugarcane practices, this study was aimed to investigate the effects of the pesticides 2,4-Dichlorophenoxyacetic acid (2,4-D) and fipronil, as well as vinasse, on the survival, behavior, and reproduction of the native epibenthic macroinvertebrate Hyalella meinerti through in situ and laboratory experiments. In situ assays were conducted in mesocosms with six treatments, i.e. untreated control, 2,4-D, fipronil, and vinasse, the mixture of the two pesticides, and both pesticides mixed with vinasse. Survival, swimming behavior, and reproduction were evaluated over time post contamination, from 0−96 h (T1) and 7–14 days (T2) through in situ experiments and 30–44 days (T3) and 75–89 days (T4) post contamination by laboratory bioassays with mesocosm water. In the T1 period, survival of H. meinerti was registered only in controls and mesocosms treated with 2,4-D. In the T2 period, treatments containing fipronil and vinasse (isolated or in both mixture treatments) still caused 100 % of mortality. Survival was recorded only in 2,4-D and control treatments, whereas reproduction only occurred in the control. In the T3 period, no survival occurred to fipronil and both mixture treatments. Vinasse and 2,4-D decreased total reproduction in comparison to control. In the T4 period, amphipods survival was detected when exposed to fipronil and its mixture with 2,4-D. However, these same treatments decreased the amplexus rates and total reproduction, with synergism denoted for the pesticide mixture. The swimming activity of males, females, and couples was decreased in surviving organisms exposed to 2,4-D, fipronil, vinasse, and the mixture of pesticides along all experimental periods. Our study showed that the application of fipronil, 2,4-D, and vinasse isolated or mixed at realistic concentrations of actual sugarcane management practices may negatively impact functional responses of indigenous amphipods in natural aquatic systems. |
| Databáze: | OpenAIRE |
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