Neonicotinoid Contamination in the Aquatic Ecosystems—What We Know?

Опубликована: Янв. 1, 2024

Язык: Английский

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Association between Haematological Parameters and Exposure to a Mixture of Organophosphate and Neonicotinoid Insecticides among Male Farmworkers in Northern Thailand

International Journal of Environmental Research and Public Health, Год журнала: 2021, Номер 18(20), С. 10849 - 10849

Опубликована: Окт. 15, 2021

Exposure to insecticides may result in various health problems. This study investigated the association between haematological parameters and exposure a mixture of organophosphate (OP) neonicotinoid (NEO) among male farmworkers Fang district, Chiang Mai province, northern Thailand. Concentrations urinary dialkylphosphates, non-specific metabolites OPs, NEOs their were measured 143 farmworkers. The Bayesian kernel machine regression model was employed evaluate associations. significantly associated with mean corpuscular haemoglobin concentration (MCHC) when concentrations all compounds at 60th percentile or higher compared 50th percentile. Furthermore, clothianidin (CLO) showed decreasing MCHC other concentrations. CLO most likely compound reduce MCHC, this confirmed by sensitivity analysis. These findings suggest that NEO insecticides, especially CLO, affects status relating parameters.

Язык: Английский

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Responses of Fishes, Amphibians, and Reptiles to Neonicotinoids

Опубликована: Янв. 1, 2024

Язык: Английский

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Effects of a Neonicotinoid Insecticide and Population Density on Behavior and Development of Wood Frogs (Rana sylvatica)

Environmental Toxicology and Chemistry, Год журнала: 2022, Номер 41(12), С. 2968 - 2980

Опубликована: Сен. 12, 2022

Abstract Amphibians have been facing global declines over the last decades from direct and indirect effects of anthropogenic activities. A contributor to is waterway contamination agricultural runoffs pesticides such as neonicotinoids. Beyond pesticide, few studies investigated possible interactions between neonicotinoids natural environmental stressors across larval development, which could alter strength direction observed neonicotinoid effects. The present study used a fully crossed design investigate how concentration imidacloprid (a neonicotinoid; 10 µg/L) measured in surface waters interacted with low high population densities (0.33 1 tadpole/L, respectively), an important stressor, influence behavior development metamorphosis wood frogs ( Rana sylvatica ), known breed landscapes. Behaviors were absence presence predation cues using open‐field tests at three distinct developmental stages, up metamorph stage. We found that did not interact density or independently affect behaviors cues. However, individuals raised compared more active early stage but less metamorphic climax. Furthermore, both decreased freezing response tadpoles Finally, we distance traveled test was weakly repeatable aquatic stages metamorphosis, pattern affected by treatments. provides novel insights on ecotoxicology highlighting importance including behavioral assays amphibian ecotoxicology. Environ Toxicol Chem 2022;41:2968–2980. © 2022 SETAC

Язык: Английский

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Toxicity of the neonicotinoid insecticides thiamethoxam and imidacloprid on tadpoles of four species of South American amphibians and effects of thiamethoxam on the metamorphosis of Rhinella arenarum

Research Square (Research Square), Год журнала: 2022, Номер unknown

Опубликована: Авг. 23, 2022

Abstract The present study examined the acute and chronic toxicity of neonicotinoid insecticides imidacloprid thiamethoxam in neotropical amphibian species from Pampa region Argentina. median lethal concentration after 96h exposure (96h-LC50) ranged between 11.28 > 71.2 mg/L amongst all development stages tested; indicating that these pesticides are unlikely to cause wild. subchronic was also low, with 21d-LC50 values ranging 27.15 mg/L. However, developing tadpoles Rhinella arenarum stage 27 until completion metamorphosis showed treated animals a significant reduction metamorphic success together smaller size at an asymmetry length left right front arms. These effects, which observed starting lowest tested (9 mg/L), suggest effect on hypothalamic-pituitary-thyroid (HPT) axis. Given effects can clearly impair performance survival wild, further studies employing same experimental approach but looking lower environmentally-relevant concentrations needed.

Язык: Английский

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