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Open AccessArticle

Effects of AgNPs on the Snail Biomphalaria glabrata: Survival, Reproduction and Silver Accumulation

1
Embrapa Cerrados, Rodovia BR 020, Km 18, Planaltina, DF 73301-970, Brazil
2
Centro Universitário de Brasília (UniCEUB), Faculdade de Ciências da Educação e Saúde (FACES), Brasília, DF 70790-075, Brazil
3
Instituto de Ciências Biológicas, Departamento de Genética e Morfologia, Universidade de Brasília (UnB), Brasília, DF 70910-900, Brazil
*
Author to whom correspondence should be addressed.
Toxics 2019, 7(1), 12; https://doi.org/10.3390/toxics7010012
Received: 11 February 2019 / Revised: 22 February 2019 / Accepted: 26 February 2019 / Published: 1 March 2019
(This article belongs to the Special Issue Nanoparticles Toxicity and Impacts on Biodiversity)
Silver nanoparticles (AgNPs) are used intensively in medical and industrial applications. Environmental concerns have arisen from the potential release of this material into aquatic ecosystems. The aims of this research were to evaluate the potential accumulation of silver in the whole body of organisms and analyze the effects of AgNPs on the survival and reproduction of the snail Biomphalaria glabrata. Results show slow acute toxicity with a 10-day LC50 of 18.57 mg/L and an effective decrease in the eggs and egg clutches per organism exposed to tested concentrations. Based on these data, the No Observed Effect Concentration (NOEC) observed was <1 mg/L for snail reproduction. For silver accumulation, we observed that uptake was faster than elimination, which was very slow and still incomplete 35 days after the end of the experiment. However, the observed accumulation was not connected with a concentration/response relationship, since the amount of silver was not equivalent to a higher reproductive effect. The data observed show that AgNPs are toxic to B. glabrata, and suggest that the snail has internal mechanisms to combat the presence of Ag in its body, ensuring survival and reduced reproduction and showing that the species seems to be a potential indicator for Ag presence in contaminated aquatic ecosystems. View Full-Text
Keywords: nanotechnology; ecotoxicology; benthic species; metals; chronic toxicity nanotechnology; ecotoxicology; benthic species; metals; chronic toxicity
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Oliveira-Filho, E.C.; Muniz, D.H.F.; Carvalho, E.L.; Cáceres-Velez, P.R.; Fascineli, M.L.; Azevedo, R.B.; Grisolia, C.K. Effects of AgNPs on the Snail Biomphalaria glabrata: Survival, Reproduction and Silver Accumulation. Toxics 2019, 7, 12.

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