Lethal concentration of clomazone, metsulfuron-metil, and quinclorac for silver catfish, Rhamdia quelen, fingerlings

Miron, Denise dos Santos; Silva, Lenise Vargas Flôres da; Golombieski, Jaqueline Ineu; Machado, Sérgio Luiz de Oliveira; Marchezan, Enio; Baldisserotto, Bernardo

doi:10.1590/s0103-84782004000500021

Cited by 12 publications

(5 citation statements)

References 12 publications

(10 reference statements)

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“…Although very effective, it is known for contributing to environmental contamination due to its high solubility in water (1100 mg L −1 ) (Zanella et al 2002). Previous studies have already described that clomazone caused increased mortality of Rhamdia quelen (LC50 7.32 μL L −1 ) (Crestani et al 2007), and convulsions occurred after 30-min exposure to 20 and 50 mL/L (Miron et al 2004). In addition, clomazone exposures have caused suppression of catalase antioxidant enzyme and increased lipid peroxidation in Rhamdia quelen, activation of glutathione transferase enzyme activity in Prochilodus lineatus (Pereira et al 2013); and to cause high mortality, teratogenic effects, and underdevelopment in Danio rerio embryos, findings that evidence its toxicity (Stevanovic et al 2017).…”

Section: Discussionmentioning

confidence: 99%

Ecotoxicological assessment of Uruguay River and affluents pre- and post-pesticides’ application using Caenorhabditis elegans for biomonitoring

Kuhn

Jacques

Teixeira

et al. 2021

Environ Sci Pollut Res

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Uruguay River is the most important river in western Rio Grande do Sul, separating Brazil from Argentina and Uruguay. However, its pollution is of great concern due to agricultural activities in the region and the extensive use of pesticides. In a long term, this practice leads to environmental pollution, especially to the aquatic system. The objective of this study was to analyze the physicochemical characteristics, metals and pesticides levels in water samples obtained before and after the planting and pesticides' application season from three sites: Uruguay River and two minor affluents, Mezomo Dam and Salso Stream. For biomonitoring, the free-living nematode Caenorhabditis elegans was used, which were exposed for 24 h. We did not find any significant alteration in physicochemical parameters. In the pre-and post-pesticides' samples we observed a residual presence of three pesticides (tebuconazole, imazethapyr, and clomazone) and metals which levels were above the recommended (As, Hg, Fe, and Mn). Exposure to both pre-and post-pesticides' samples impaired C. elegans reproduction and post-pesticides samples reduced worms' survival rate and lifespan. PCA analysis indicated that the presence of metals and pesticides are important variables that impacted C. elegans biological endpoints. Our data demonstrates that Uruguay River and two affluents are contaminated independent whether before or after pesticides' application season. In addition, it reinforces the usefulness of biological indicators, since simple physicochemical analyses are not sufficient to attest water quality and ecological safety.

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Section: Discussionmentioning

confidence: 99%

Ecotoxicological assessment of Uruguay River and affluents pre- and post-pesticides’ application using Caenorhabditis elegans for biomonitoring

Kuhn

Jacques

Teixeira

et al. 2021

Environ Sci Pollut Res

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“…[56][57][58] Other studies tested the toxicity of pesticides sprayed over rice crops, calling attention for the possible deleterious effects on fingerlings of the catfish Rhamdia quelen. 59,60 Considering the effects of organophosphate compounds on the nervous system of aquatic animals and their toxicity to non-target species, this group of pesticides has been considered as of great concern in Brazil. Many studies were performed to verify the toxicity of different organophosphate compounds to fish biochemistry and physiology.…”

Section: Aquatic Pollutants Of Concern and Biological Modelsmentioning

confidence: 99%

Toxicity tests aiming to protect Brazilian aquatic systems: current status and implications for management

Martins

Bianchini

2011

J. Environ. Monit.

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The current status of toxicological tests performed with Brazilian native species was evaluated through a survey of the scientific data available in the literature. The information gathered was processed and an electronic toxicology database (http://www.inct-ta.furg.br/bd_toxicologico.php) was generated. This database provides valuable information for researchers to select sensitive and tolerant aquatic species to a large variety of aquatic pollutants. Furthermore, the toxicology database allows researchers to select species representative of an ecosystem of interest. Analysis of the toxicology database showed that ecotoxicological assays have significantly improved in Brazil over the last decade, in spite of the still relatively low number of tests performed and the restricted number of native species tested. This is because most of the research is developed in a few laboratories concentrated in certain regions of Brazil, especially in Southern and Southeast regions. Considering the extremely rich biodiversity and the large variety of aquatic ecosystems in Brazil, this finding points to the urgent need for the development of ecotoxicological studies with other groups of aquatic animals, such as insects, foraminifera, cnidarians, worms, amphibians, among others. This would help to derive more realistic water quality criteria (WQC) values, which would better protect the different aquatic ecosystems in Brazil. Finally, the toxicology database generated presents solid and science based information, which can encourage and drive the Environmental Regulatory Agencies in Brazil to derive WQC based on native species. In this context, the present paper discusses the historical evolution of ecotoxicological studies in Brazil, and how they have contributed to the improvement of the Brazilian Federal and Regional regulations for environment.

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“…Deste modo, a água a ser liberada para rios e lagos apresentará uma quantidade muito menor do agroquímico, reduzindo seu impacto no ambiente. Juvenis de jundiá não demonstraram sinais aparentes de intoxicação nem alteração do desenvolvimento inicial e ganho de peso durante 45 dias quando expostos à água da lavoura arrozeira onde havia sido aplicado metsulfuron metil, clomazone ou quinclorac 21 dias antes (Miron et al 2004), demonstrando a efetividade desta proposta. Zanella et al (2002) concluíram que para evitar a contaminação de cursos d'água à jusante de lavoura de arroz irrigado deve-se reter a água de irrigação na lavoura até 28 dias.…”

Section: Estratégias Para Minimizar O Impacto Dos Agroquímicosunclassified

Uma importante revisão sobre o impacto de agroquímicos da cultura de arroz em peixes

2009

Self Cite

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Na lavoura arrozeira, o uso de agroquímicos no controle de plantas daninhas e insetos é recomendado para garantir maior produtividade. Entretanto, sua utilização pode acarretar uma série de efeitos em organismos não alvos, como os peixes. Deste modo, esta revisão tem como objetivo analisar os dados existentes sobre os efeitos dos agroquímicos utilizados no cultivo de arroz em peixes, de modo a propor estratégias que minimizem seu impacto. Existe grande variação entre os agroquímicos testados quanto à toxicidade, sendo a determinação da concentração letal mediana em 96 horas apenas uma estimativa inicial para estudos adicionais, uma vez que para muitos deles concentrações inferiores podem provocar alterações bioquímicas nos tecidos dos peixes, as quais se mostram mais efetivas como biomarcadores. Para minimizar o impacto dos agroquímicos deve-se utilizar sempre a dose mínima recomendada, e manter estática a lâmina de água do cultivo por um período mínimo de duas semanas após a aplicação, de modo que o princípio ativo seja degradado, reduzindo a toxicidade. Além disso, o manejo integrado de pragas é recomendando, bem como a rizipiscicultura, a qual evita a utilização dos agroquímicos e em alguns casos pode promover um rendimento semelhante.

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Lethal concentration of clomazone, metsulfuron-metil, and quinclorac for silver catfish, Rhamdia quelen, fingerlings

Cited by 12 publications

References 12 publications

Ecotoxicological assessment of Uruguay River and affluents pre- and post-pesticides’ application using Caenorhabditis elegans for biomonitoring

Ecotoxicological assessment of Uruguay River and affluents pre- and post-pesticides’ application using Caenorhabditis elegans for biomonitoring

Toxicity tests aiming to protect Brazilian aquatic systems: current status and implications for management

Uma importante revisão sobre o impacto de agroquímicos da cultura de arroz em peixes

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