Differential toxicity to Cd, Pb, and Cu in dragonfly larvae (Insecta: Odonata)

Archives of Environmental Contamination and Toxicology
V D TollettT M Rice

Abstract

Odonate larvae are important organisms in aquatic ecosystems but have been rarely studied in laboratory toxicity tests. Only a few previous studies have been conducted on odonates and their responses to heavy metals. We exposed two species of libellulid larvae (Anisoptera: Libellulidae) to equimolar concentrations of cadmium, lead, or copper in 7-day survival tests. Larvae were tolerant of high concentrations of cadmium and lead, as no significant decrease in survival was observed at exposures as high as 0.893 and 2.232 mM, respectively. In contrast, larvae were more sensitive to copper exposure, demonstrating significantly decreased survival to exposures as low as 2.360 microM. In whole animal samples, larvae accumulated very high concentrations (>1000 microg/g dry weight) of all three metals in an exposure-related manner. Much of this accumulation could probably be attributed to adsorption or accumulation of metal within the exoskeleton, because odonate larvae are known to sequester metals into this material. Our results were generally consistent with previous observations indicating that odonates are tolerant to metal exposures, even in comparison with other aquatic invertebrates. However, there are few studies that have use...Continue Reading

References

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Citations

Mar 12, 2016·Environmental Science and Pollution Research International·Xiangyang WuLiuqing Yang
Nov 8, 2014·Environmental Toxicology and Chemistry·János UjszegiAttila Hettyey
Sep 1, 2016·Animal Cognition·Kinsey H PhilipsEmilie C Snell-Rood
Feb 17, 2017·PloS One·Dean E FletcherJ Vaun McArthur
Nov 8, 2020·International Journal of Environmental Research and Public Health·Abraham Addo-Bediako, Karabo Malakane
Sep 6, 2020·The Science of the Total Environment·Abraão Tiago Batista GuimarãesGuilherme Malafaia
Nov 4, 2020·The Science of the Total Environment·Thales Quintão ChagasGuilherme Malafaia
Dec 11, 2020·Environmental Pollution·Erik Neff, Guha Dharmarajan
Jul 1, 2018·Chemosphere·Velesia Lesch, Hindrik Bouwman
Nov 5, 2019·Environmental Pollution·Dean E FletcherJ Vaun McArthur
May 26, 2021·The Science of the Total Environment·Coline MonchaninMathieu Lihoreau
Jul 3, 2021·International Journal of Molecular Sciences·Rosaria NotarialeCaterina Manna

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