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.accessioned2015-04-09T10:22:37Z
dc.date.accessioned2023-06-23T14:00:39Z
dc.date.available2015-04-09T10:22:37Z
dc.date.available2023-06-23T14:00:39Z
dc.date.issued2010-08
dc.descriptionEcotoxicology and Environmental Safetyen_US
dc.description.abstractWe compared the bioaccumulation 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.sponsorshipsupported by Grants from International Program for Chemical Sciencesen_US
dc.identifier.citationSiwela, a H., Nyathi, C.B. & Naik, Y.S., 2009. Metal accumulation and antioxidant enzyme activity in C. gariepinus, catfish, and O. mossambicus, tilapia, collected from Lower Mguza and Wright Dams, Zimbabwe. Bulletin of environmental contamination and toxicology, 83(5), pp.648–51.en_US
dc.identifier.urihttp://196.220.97.103:4000/handle/123456789/488
dc.language.isoenen_US
dc.publisherElsevier Inc.en_US
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.subjectLymnaea 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, Zimbabween_US
dc.typeArticleen_US
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