The effects of silver nanoparticles on oyster embryos

Marine Environmental Research
Amy H RingwoodDavid L Carroll

Abstract

Nanoparticles may be introduced into aquatic environments during production processes and also as a result of release following their use in various commercial formulations and biologic applications. Filter-feeding bivalve mollusks such as oysters are valuable model species for characterizing nanoparticle bioavailability and interactions with basic cellular processes. The adults release their gametes into the environment, so their embryos and larvae are also likely targets of nanoparticles. The purpose of these studies was to characterize the toxicity of metal nanoparticles on embryonic development of oysters, Crassostrea virginica and to compare the relative sensitivity of embryos to adults. Newly-fertilized oyster embryos were exposed to silver nanoparticles (AgNP) and then the percent normal development after 48h was assessed. Studies were conducted with adult oysters in which they were also exposed to AgNP for 48h, and the effects on lysosomal destabilization were determined. The expression of metallothionein (MT) gene expression was also assessed in both embryos and adults. Adverse effects on embryonic development were observed at concentrations similar to those that caused both statistically and biologically significant e...Continue Reading

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