A comparison of metal levels and antioxidant enzymes in freshwater snails,Lymnaea natalensis, exposed to sediment and water collected from Wright Dam and Lower Mguza Dam, Bulawayo, Zimbabwe.

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dc.contributor.authorSiwela, Andrew H.
dc.contributor.authorNyathi, C.B.
dc.contributor.authorNaik, Yogeshkumar S.
dc.date.accessioned2014-02-20T12:20:38Z
dc.date.accessioned2023-06-23T14:00:41Z
dc.date.available2014-02-20T12:20:38Z
dc.date.available2023-06-23T14:00:41Z
dc.date.issued2010-08-02
dc.descriptionThe journal article is available online at ScienceDirecten_US
dc.description.abstractWe compared the bioaccuniulation of lead (Pb), cadmium (Cd), zinc (Zn), copper (Cu), nickel (Ni) and iron (Fe) with antioxidant enzyme activity in tissues of the snails, Lymnaea natalensis, exposed to elements of two differently polluted dams. 45 snails were exposed to sediment and water collected from Wight Dam (reference) whilst another 45 snails were also exposed to sediment and water collected from Lower Mguza Dam (polluted dam). Except for Fe in sediment and Pb in water, metal concentrations were statistically higher in sediment and water collected from Lower Mguza Dam. Lead. Cd and Zn were two times higher in tissues of snails exposed to Lower Mguza Dam elements. On one hand, superoxide dismutase (SOD), diphosphotriphosphodiaphorase (DTD) and catalase (CAT) activities were significantly lower whilst malondialdehyde (MDA) levels were significantly higher in tissues of snails exposed to Lower Mguza Dam sediment and water. On the other hand, selenium-dependent glutathione peroxidase (Se-GPX) activity was significantly elevated in tissues of snails exposed to Lower Mguza Dam sediment and water. Snails exposed to Lower Mguza Dam elements seem to have responded to pollution by increasing CAT and Se-GPX specific activity in an effort to detoxify peroxides produced as a result of metal induced oxidative stress.en_US
dc.description.sponsorshipInternational Program for Chemical Sciences, Sweden and Research Board, National University of Science and Technology, Zimbabwe.en_US
dc.identifier.citationSiwela A.H, Nyathi C.B and Naik Y.S. (2010) A comparison of metal levels and antioxidant enzymes in freshwater snails, Lymnaea natalensis, exposed to sediment and water collected from Wright Dam and Lower Mguza Dam, Bulawayo, Zimbabwe. Elsevier Inc.en_US
dc.identifier.otherD.O.I: 0147-6513
dc.identifier.urihttp://196.220.97.103:4000/handle/123456789/374
dc.language.isoenen_US
dc.publisherElsevier Inc.en_US
dc.relation.ispartofseriesEcotoxicology and Environmental Safety;1728-1732
dc.rights.licenseThis article was downloaded from NUST Institutional repository, and is made available under the terms and conditions as set out in the Institutional Repository Policy.en_US
dc.subjectAntioxidant enzymesen_US
dc.subjectHeavy metalsen_US
dc.subjectLvmnaea natalensisen_US
dc.titleA comparison of metal levels and antioxidant enzymes in freshwater snails,Lymnaea natalensis, exposed to sediment and water collected from Wright Dam and Lower Mguza Dam, Bulawayo, Zimbabwe.en_US
dc.typeArticleen_US
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