Aspects of the sensitivity of juvenile Jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil

 

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dc.contributor.advisor Brown, Alec C en_ZA
dc.contributor.author Lipschitz, Steven Richard en_ZA
dc.date.accessioned 2016-09-20T12:35:02Z
dc.date.available 2016-09-20T12:35:02Z
dc.date.issued 1983 en_ZA
dc.identifier.citation Lipschitz, S. 1983. Aspects of the sensitivity of juvenile Jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/21850
dc.description Bibliography: pages 110-125. en_ZA
dc.description.abstract 1. A flow-through aquarium facility, for testing the toxicity of the water-soluble fraction (WSF) of crude oil is described. 2. The 24 hour median lethal concentration (LC50) of WSF of crude oil for 2 to 3 year old (30 - 45 mm cephalothorax length) juvenile Jasus lalandii ranged from 3,7 to 5,9 mg l⁻¹. 3. Behavioural experiments appear to provide a quick and convenient approach for estimating the relative toxicity of the WSF of crude oil. 4. The major effect of the WSF of crude oil on Jasus heart beat rate was bradycardia. Furthermore, the greater the initial exposure concentration the sooner the heart beat frequency decreased. 5. Exposure of Jasus muscle fibres to the WSF of crude oil resulted in a shift of the resting membrane potential of those fibres in a hyperpolarising direction. Preliminary investigations into the level of excitability of decapod neurons after exposure to the WSF, indicated a rapid increase, followed by a decrease in excitability, to a level below that of unexposed tissue. 6. Recommendations are made as to how the findings of this study could be applied to enhance the sensitivity of toxicity bioassays. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Zoology en_ZA
dc.title Aspects of the sensitivity of juvenile Jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil en_ZA
dc.type Thesis / Dissertation en_ZA
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Biological Sciences en_ZA
dc.type.qualificationlevel Masters en_ZA
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image


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