Acute and (sub)chronic toxicity of the neonicotinoid imidacloprid on Chironomus riparius
Language English Country England, Great Britain Media print-electronic
Document type Journal Article
PubMed
29957517
DOI
10.1016/j.chemosphere.2018.06.102
PII: S0045-6535(18)31177-9
Knihovny.cz E-resources
- Keywords
- Aquatic insects, Fitness traits, GSH, GSSG, Lipid peroxidation, Oxidative stress,
- MeSH
- Chironomidae drug effects MeSH
- Nitro Compounds toxicity MeSH
- Insecta MeSH
- Neonicotinoids toxicity MeSH
- Oxidative Stress MeSH
- Animals MeSH
- Check Tag
- Animals MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Nitro Compounds MeSH
- imidacloprid MeSH Browser
- Neonicotinoids MeSH
Impacts of neonicotinoids on non-target insects, including aquatic species, may significantly influence ecosystem structure and functioning. The present study investigated the sensitivity of Chironomus riparius to imidacloprid exposures during 24-h, 10- and 28-days by assessing larval survival, growth, emergence and oxidative stress-related parameters. C. riparius exhibited high sensitivity compared to other model aquatic species with acute 24-h LC50 being 31.5 μg/L and 10-days LOEC (growth) 0.625 μg/L. A 28-days partial life cycle test demonstrated imidacloprid effects on the emergence of C. riparius. Exposure to sublethal concentrations during 10-days caused an imbalance in the reduced and oxidized glutathione (GSH and GSSG), and slightly induced lipid peroxidation (increased malondialdehyde, MDA). Our results indicate that oxidative stress may be a relevant mechanism in the neonicotinoid toxicity, reflected in the insect development and life cycle parameters.
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