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Title: Environmental pollution and its effects on marine Crustacea
Author: Abdul-Hassan, Jabbar Khettar
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1983
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The present study has been carried out using three decapod crustaceans, which were chosen as indicators assay organisms for pollution by heavy metals (copper, lead and chromium) and hydrocarbons (benzene, crude oil and hexane). LT5 and LT0 values were determined for these heavy metals during summer and winter seas. Winter treatments showed an increase in survival rate by comparison with those in summer treatments. IT and LT values were also determined for males and females of shore crabs 50Carcinus"D maenas treated with these metals. Accumulation of copper ions by gills, hepatopancreas and gonads of C. vulgaris and P. serratus collected from Swansea Bay and Mumbles Head and of C. maenas collected from Swansea Bay, Mumbles Head, Oxwich and Rhossili was determined after exposure to this metal. In C. maenas the accumulation values for the four stations could be placed in the following order: for gills, Mumbles Head > Oxwich > Rhossili > Swansea Bay: for gonads, Mumbles Head > Oxwich > Swansea Bay > Rhossili and for hepatopancreas, Mumbles Head > Oxwich > Swansea Bay > Rhossili. It seems that Mumbles Head is the most polluted and Rhossili is the least polluted of these stations. The effects of these metals at three temperatures (8, 15 and 22°C) on oxygen consumption rates of C. maenas were determined using a Gilson respirometer. A reduction in oxygen consumption rates was generally noted. The toxicity of benzene, crude oil and hexane on these specimens was determined during 96 hrs. C. vulgaris is more sensitive than C. maenas and this species is more sensitive than P. serratus. Synergistic effects of temperature and salinity on the survival of C. maenas were recorded, using six temperatures and fifteen salinities. The effect of various temperatures on total lipid content has also been studied. Thin layer chromatography was used to separate the lipid fractions. LC values for these three species, treated with three heavy metals and hydrocarbons, were determined. Deficiencies in studies of Swansea Bay are discussed, together with general aspects of pollution by hydrocarbons and heavy metals. The importance of devising an efficient and easy method to remove oil from the environment is also mentioned. Data on production of petroleum and seaborne oil pollution are introduced, especially for the Middle East. The Arabian Gulf needs more study in order to determine the sources of pollution. I intend to contribute to this on my return. Shrimp fisheries in the Gulf are particularly at risk from pollution arising from activities related to this industry.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available