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Title: Effects of petroleum hydrocarbons on some fish and food organisms
Author: Al Mohanna, M. M. M.
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1988
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The effect of hydrocarbons, in the form of WSF (water soluble fraction) of North Sea crude oil and naphthalene, upon the respiratory rate and survival of the freshwater isopod, Asellus aquaticus (L.), was examined at different temperatures (10°C and 17°C). The influence of pH and water hardness on the toxicity of the WSF was investigated; it was found to be less toxic in pH 7 and in hard water. Asellus was found to accumulate naphthalene (labelled with 14C) rapidly. The effects of these hydrocarbons on postfertilization development in the Atlantic herring Clupea harengus (L.) were also studied. Artificially fertilized eggs were exposed to different concentrations, the volume of egg, yolk and perivitelline space were measured and the development of the embryos was observed. Exposure to hydrocarbons altered the rates of development, heart beat and embryonic movement; the hatching point was retarded and deformities were observed amongst the resulting larvae. The influeace of naphthalene on the ultra-structure of brain and muscle in C. harengus larvae, hatched from eggs previously exposed to naphthalene, was examined. Electron microscopy revealed cellular changes: many mitochrondria were swollen, their cristae disrupted. The accumulation and distribution of crude oil and naphthalene introduced into adult rainbow trout Salmo gairdneri (Richardson) in their diet, were followed. High concentrations of these hydrocarbons were accumulated in both the gut and the liver of the trout; smaller quantities were found in their gills, kidneys, muscle, heart and brain.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available