Metal Levels and Antioxidant Enzyme Activities in Freshwater Snails Exposed to Sediments From Polluted and Pristine Dams in Zimbabwe
| dc.contributor.author | Naik, Yogeshkumar S. | |
| dc.contributor.author | Nyathi, C.B. | |
| dc.contributor.author | Siwela, Andrew H. | |
| dc.date.accessioned | 2013-03-12T08:16:39Z | |
| dc.date.accessioned | 2023-06-26T12:55:37Z | |
| dc.date.available | 2013-03-12T08:16:39Z | |
| dc.date.available | 2023-06-26T12:55:37Z | |
| dc.date.issued | 2013-03-12 | |
| dc.description | Presented at the Fourth International Conference of the Society for Free Radical Research - Africa in October 2003. | en_US |
| dc.description.abstract | The aim of this study was to determine the metal and antioxidant enzyme activities (AGE's) in the freshwater snail Lymnaea natalensis, exposed to sediments form a polluted (Umguza) and pristine (Wright) dams around Bulawayo City, Zimbabwe with a view to developing a biomarker of freshwater pollution. Adult lab reared snails (10-15 mm) were exposed for 4 weeks to water and sediment cofiected from 4 different sites of Umguza Dam (a sink of domestic and industrial effluent) and Wright Dam (privately owned -and considered to be relatively pristine). Antioxidant. enzymes, heavy metals and malondia1dehyde (MDA) analyses were performed using the S-9 fraction of whole snail soft tissue. Catalase and glutathione peroxidase activities were significantly elevated in snails exposed to Umguza Dam water and sediment (Student t-test, p < 0.01 and p < 0.001) when compared to snails exposed to Wright Dam. DT- diaphorase activity was significantly reduced in snails exposed to Umguza Dam water and sediment (p < 0.001) when compared to snails exposed to Wright Dam water and sediment. Snails exposed to Umguza Dam water and sediment bad a higher total metal load compared to those exposed to Wright Dam elements and the MDA levels were correspondingly elevated in snails exposed to polluted water and sediment (p < 0.01). The higher MDA levels and altered AGE activities suggest that the snails exposed to Umguza Dam elements are under higher oxidative stress. | en_US |
| dc.description.sponsorship | SFRR | en_US |
| dc.identifier.uri | http://196.220.97.103:4000/handle/123456789/249 | |
| dc.language.iso | en | en_US |
| dc.rights.license | This 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.subject | Snails | en_US |
| dc.subject | Antioxidant Enzymes | en_US |
| dc.subject | Water Pollution | en_US |
| dc.title | Metal Levels and Antioxidant Enzyme Activities in Freshwater Snails Exposed to Sediments From Polluted and Pristine Dams in Zimbabwe | en_US |
| dc.type | Working Paper | en_US |