engleski

THE IMPACT OF THIAMETHOXAM EXPOSURE ON FEEDING, LOCOMOTOR ACTIVITY, AND METABOLOMICS OF ABAX PARALLELUS (COLEOPTERA: CARABIDAE)

Carabids are widespread predators in ecosystems that serve as biocontrol agents in agroecosystems and forestry. Pesticides have been proven in studies to have sub-lethal effects on their behavior and physiology, which can affect predation efficiency. The impact of neonicotionoid thiamethoxam on feeding rate, locomotion, metabolomics, and oxidative stress in a predatory carabid, Abax parallelus, is investigated in this study. Beetles were dipped in increasing quantities of thiamethoxam and allowed to feed overnight. For each beetle, the mass of the ingested food was calculated as a percentage of its body weight. After the treatment, the locomotor capacity was monitored for 48 hours. The researchers looked at their metabolomics profile as well as the levels of superoxide dismutase (SOD) in their tissue. Individuals treated with higher concentrations had significantly lower feeding rates and a higher percentage of intoxicated and moribund individuals. Succinate and d-glucose had statistically significant differences in concentrations between treatment and control group, indicating a disruption in energy production. No statistically significant changes in SOD activity were detected between the groups. To summarize, short-term thiamethoxam exposure can cause unfavorable sub-lethal consequences in predatory activity, behavior, and energy budget, but long-term exposure to lower dosages need more research.

Feeding ; ground beetles ; metabolomics ; neonicotinoids ; oxidative stress ;

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