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Effects of engineered nanoparticles on survival, reproduction, and behaviour of freshwater snail, Physa acuta (Draparnaud, 1805)

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dc.contributor.author Musee, N
dc.contributor.author Oberholster, Paul J
dc.contributor.author Sikhwivhilu, L
dc.contributor.author Botha, AM
dc.date.accessioned 2011-02-23T07:34:39Z
dc.date.available 2011-02-23T07:34:39Z
dc.date.issued 2010
dc.identifier.citation Musee, N., Oberholster, P.J., Sikhwivhilu, L. and Botha, A.M. 2010. Effects of engineered nanoparticles on survival, reproduction, and behaviour of freshwater snail, Physa acuta (Draparnaud, 1805). Chemosphere, Vol. 81(10), pp 1196-1203 en_US
dc.identifier.issn 0045-6535
dc.identifier.uri http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6V74-5172K72-7-9&_cdi=5832&_user=958262&_pii=S0045653510010556&_origin=search&_coverDate=11/30/2010&_sk=999189989&view=c&wchp=dGLbVlz-zSkWb&_valck=1&md5=95e873d0ca8a37e03c39a6a081341e99&ie=/sdarticle.pdf
dc.identifier.uri http://hdl.handle.net/10204/4886
dc.description Copyright: 2010 Elsevier. This is the Post print version of the work. The definitive version is published in Chemosphere, Vol. 81(10), pp 1196-1203 en_US
dc.description.abstract Increasing uses of engineered nanoparticles (ENPs) in commercial products and industrial applications has eventually resulted to their releases into atmospheric, terrestrial, and aquatic environments. However, knowledge gaps in ENPs toxicity, fate, and behaviour currently limit our ability to quantify risk assessment of materials with nanoscale dimensions, and therefore, the extent of the resultant environmental impacts remains unknown. In the present study, we evaluated the effects of c-alumina, a-alumina, modified TiO2 (M-TiO2), and commercial TiO2 (C-TiO2) ENPs on the survival, behaviour, and early life stages of the freshwater snail Physa acuta (Draparnaud). The toxicity evaluation was carried out after spiking commercial sand with ENPs concentrations of 0.005, 0.05, or 0.5 g kg_1. Our findings suggest that increases of c-alumina and a-alumina concentrations at sub-lethal level concentrations caused significant reduction in the embryo growth rate and embryo hatchability. In addition, these ENPs induced observable developmental deformities of the embryos. In addition, toxicity evaluations using acute 96-h and chronic 28-d tests showed exposure duration may be a significant factor in ENPs-induced toxicity. Therefore, long-term exposure of aquatic organisms to ENPs – potentially can alter certain ecological populations at different trophic levels – and may compromise the entire aquatic ecological functionality. The percentage hatchlings in test chambers containing 0.5 g kg_1 c-alumina and a-alumina concentration was 50% less to those observed in the controls. Our results suggest the embryonic growth and hatchability tests are useful endpoints in chronic sediment toxicity tests for determining the toxic thresholds of ENPs in sediment environment. Although no snail mortalities were observed during the static 96-h test containing sediment spiked with different concentrations of M-TiO2, C-TiO2, c-alumina and a-alumina – the antioxidant enzymatic assay results indicated a significant change in antioxidant levels which altered peroxidation at 0.05 or 0.5 g kg_1concentrations for both c-alumina and a-alumina. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Workflow request;5035
dc.subject Sediments en_US
dc.subject Snails en_US
dc.subject Physa acuta en_US
dc.subject Antioxidant enzymes en_US
dc.subject Embryonic growth en_US
dc.subject Hatchability en_US
dc.title Effects of engineered nanoparticles on survival, reproduction, and behaviour of freshwater snail, Physa acuta (Draparnaud, 1805) en_US
dc.type Article en_US
dc.identifier.apacitation Musee, N., Oberholster, P. J., Sikhwivhilu, L., & Botha, A. (2010). Effects of engineered nanoparticles on survival, reproduction, and behaviour of freshwater snail, Physa acuta (Draparnaud, 1805). http://hdl.handle.net/10204/4886 en_ZA
dc.identifier.chicagocitation Musee, N, Paul J Oberholster, L Sikhwivhilu, and AM Botha "Effects of engineered nanoparticles on survival, reproduction, and behaviour of freshwater snail, Physa acuta (Draparnaud, 1805)." (2010) http://hdl.handle.net/10204/4886 en_ZA
dc.identifier.vancouvercitation Musee N, Oberholster PJ, Sikhwivhilu L, Botha A. Effects of engineered nanoparticles on survival, reproduction, and behaviour of freshwater snail, Physa acuta (Draparnaud, 1805). 2010; http://hdl.handle.net/10204/4886. en_ZA
dc.identifier.ris TY - Article AU - Musee, N AU - Oberholster, Paul J AU - Sikhwivhilu, L AU - Botha, AM AB - Increasing uses of engineered nanoparticles (ENPs) in commercial products and industrial applications has eventually resulted to their releases into atmospheric, terrestrial, and aquatic environments. However, knowledge gaps in ENPs toxicity, fate, and behaviour currently limit our ability to quantify risk assessment of materials with nanoscale dimensions, and therefore, the extent of the resultant environmental impacts remains unknown. In the present study, we evaluated the effects of c-alumina, a-alumina, modified TiO2 (M-TiO2), and commercial TiO2 (C-TiO2) ENPs on the survival, behaviour, and early life stages of the freshwater snail Physa acuta (Draparnaud). The toxicity evaluation was carried out after spiking commercial sand with ENPs concentrations of 0.005, 0.05, or 0.5 g kg_1. Our findings suggest that increases of c-alumina and a-alumina concentrations at sub-lethal level concentrations caused significant reduction in the embryo growth rate and embryo hatchability. In addition, these ENPs induced observable developmental deformities of the embryos. In addition, toxicity evaluations using acute 96-h and chronic 28-d tests showed exposure duration may be a significant factor in ENPs-induced toxicity. Therefore, long-term exposure of aquatic organisms to ENPs – potentially can alter certain ecological populations at different trophic levels – and may compromise the entire aquatic ecological functionality. The percentage hatchlings in test chambers containing 0.5 g kg_1 c-alumina and a-alumina concentration was 50% less to those observed in the controls. Our results suggest the embryonic growth and hatchability tests are useful endpoints in chronic sediment toxicity tests for determining the toxic thresholds of ENPs in sediment environment. Although no snail mortalities were observed during the static 96-h test containing sediment spiked with different concentrations of M-TiO2, C-TiO2, c-alumina and a-alumina – the antioxidant enzymatic assay results indicated a significant change in antioxidant levels which altered peroxidation at 0.05 or 0.5 g kg_1concentrations for both c-alumina and a-alumina. DA - 2010 DB - ResearchSpace DP - CSIR KW - Sediments KW - Snails KW - Physa acuta KW - Antioxidant enzymes KW - Embryonic growth KW - Hatchability LK - https://researchspace.csir.co.za PY - 2010 SM - 0045-6535 T1 - Effects of engineered nanoparticles on survival, reproduction, and behaviour of freshwater snail, Physa acuta (Draparnaud, 1805) TI - Effects of engineered nanoparticles on survival, reproduction, and behaviour of freshwater snail, Physa acuta (Draparnaud, 1805) UR - http://hdl.handle.net/10204/4886 ER - en_ZA


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