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Details van artikel 9 van 15 gevonden artikelen
| Titel: |
Effects of Crude Oil and Spent Oil on Clarias garipinus: A Typical Marine Fish |
| Auteur: |
A.M. Gbadebo A.M. Taiwo O.B. Ola |
| Verschenen in: |
American journal of environmental sciences |
| Paginering: | Jaargang 5 (2009) nr. 6 pagina's 753-758 |
| Jaar: |
2009 |
| Inhoud: |
Problem statement: Petroleum hydrocarbon and petroleum residue (i.e., spent oil) remains the foremost pollutants to the fish communities in various aquatic media-ponds, streams, rivers, creeks, coastal and marine environments through indiscriminate disposal of oil contaminated drilling muds, cutting and oil spillages. Approach: Also, the spent oil enters into aquatic media through run-off following unguided disposal. Both the petroleum hydrocarbon and spent oil, on getting to the water bodies spread fast and produce lethal, sub-lethal and even acute effect of petroleum hydrocarbon and spent oil on the fingerlings and other juvenile fishes. Results: Since this group of fish constitutes about 60% of the fish population in any aquatic medium, a green house study was carried out to assess the effects of crude oil and spent oil on fingerlings of Clarias garipinus-a typical marine fish. In this study, fingerlings of Clarias garipinus were exposed to 2-10% concentration of crude oil and spent oil for 96 h period. Readings were taken every 24 h. From concentration of 4-10%, high mortality rate averaging 10 out of 10 fingerlings were recorded. Conclusion/Recommendations: The deaths were attributed to reduced dissolved oxygen and blockage of the water surface by the oils. Concentrations of 2% showed a reduced level of mortality, which even lapsed over the 96 h period. The mortalities were owed to impairment in neurologically dysfunction. Changes in physiological character such as changes in skin color and reduced locomotive actions were also observed. |
| Uitgever: |
Science Publications (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 9 van 15 gevonden artikelen
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