Cadmium Induced Adverse Effects on Fry of Oreochromis mossambicus
This study investigates the effects of Cadmium (Cd) on fry of the Mozambique Tilapia Oreochromis mossambicus using standard toxicity tests. Fry were repeatedly exposed to five concentrations (0.002 – 2.0 mgl-1) of Cd and survival, growth and swimming activity were monitored over 10 days. These trial...
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| 格式: | Article |
| 語言: | English |
| 出版: |
University of Sri Jayewardenepura
2011-05-01
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| 叢編: | Journal of Tropical Forestry and Environment |
| 主題: | |
| 在線閱讀: | http://journals.sjp.ac.lk/index.php/JTFE/article/view/81/36 |
| _version_ | 1828379452473606144 |
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| author | W. D. Ratnasooriya M. R. Wijesinghe R. A. A. R. Ranatunge |
| author_facet | W. D. Ratnasooriya M. R. Wijesinghe R. A. A. R. Ranatunge |
| author_sort | W. D. Ratnasooriya |
| collection | DOAJ |
| description | This study investigates the effects of Cadmium (Cd) on fry of the Mozambique Tilapia Oreochromis mossambicus using standard toxicity tests. Fry were repeatedly exposed to five concentrations (0.002 – 2.0 mgl-1) of Cd and survival, growth and swimming activity were monitored over 10 days. These trials revealed that all the tested concentrations significantly enhanced mortality of the fry with concentrations above 1.0 mgl-1 resulting in 100% mortality. Mortality was positively related to the exposure level indicating dose-dependency. The LC50 1-10days ranged from 0.02 to7.26 mgl-1. Fry exposed to Cd also exhibited an increase in swimming activity in comparison to those that were not exposed indicating abnormal behaviour. Nevertheless, there was no apparent growth retardation and gross morphological defects during the brief exposure period. These findings are significant because the lethal and sublethal effects in fry were also apparent at Cd concentrations of 0.001 – 0.2 mgl-1, which are typically recorded in fresh waterbodies in Sri Lanka. |
| first_indexed | 2024-12-10T03:39:54Z |
| format | Article |
| id | doaj.art-a163ab975d4041eca0079b6b6af96548 |
| institution | Directory Open Access Journal |
| issn | 2235-9362 |
| language | English |
| last_indexed | 2024-12-10T03:39:54Z |
| publishDate | 2011-05-01 |
| publisher | University of Sri Jayewardenepura |
| record_format | Article |
| series | Journal of Tropical Forestry and Environment |
| spelling | doaj.art-a163ab975d4041eca0079b6b6af965482022-12-22T02:03:35ZengUniversity of Sri JayewardenepuraJournal of Tropical Forestry and Environment2235-93622011-05-01112735Cadmium Induced Adverse Effects on Fry of Oreochromis mossambicusW. D. RatnasooriyaM. R. WijesingheR. A. A. R. RanatungeThis study investigates the effects of Cadmium (Cd) on fry of the Mozambique Tilapia Oreochromis mossambicus using standard toxicity tests. Fry were repeatedly exposed to five concentrations (0.002 – 2.0 mgl-1) of Cd and survival, growth and swimming activity were monitored over 10 days. These trials revealed that all the tested concentrations significantly enhanced mortality of the fry with concentrations above 1.0 mgl-1 resulting in 100% mortality. Mortality was positively related to the exposure level indicating dose-dependency. The LC50 1-10days ranged from 0.02 to7.26 mgl-1. Fry exposed to Cd also exhibited an increase in swimming activity in comparison to those that were not exposed indicating abnormal behaviour. Nevertheless, there was no apparent growth retardation and gross morphological defects during the brief exposure period. These findings are significant because the lethal and sublethal effects in fry were also apparent at Cd concentrations of 0.001 – 0.2 mgl-1, which are typically recorded in fresh waterbodies in Sri Lanka.http://journals.sjp.ac.lk/index.php/JTFE/article/view/81/36CadmiumOreochromis mossambicussurvivaltoxicitySri Lanka |
| spellingShingle | W. D. Ratnasooriya M. R. Wijesinghe R. A. A. R. Ranatunge Cadmium Induced Adverse Effects on Fry of Oreochromis mossambicus Journal of Tropical Forestry and Environment Cadmium Oreochromis mossambicus survival toxicity Sri Lanka |
| title | Cadmium Induced Adverse Effects on Fry of Oreochromis mossambicus |
| title_full | Cadmium Induced Adverse Effects on Fry of Oreochromis mossambicus |
| title_fullStr | Cadmium Induced Adverse Effects on Fry of Oreochromis mossambicus |
| title_full_unstemmed | Cadmium Induced Adverse Effects on Fry of Oreochromis mossambicus |
| title_short | Cadmium Induced Adverse Effects on Fry of Oreochromis mossambicus |
| title_sort | cadmium induced adverse effects on fry of oreochromis mossambicus |
| topic | Cadmium Oreochromis mossambicus survival toxicity Sri Lanka |
| url | http://journals.sjp.ac.lk/index.php/JTFE/article/view/81/36 |
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