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Aspects of the sensitivity of juvenile Jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil
Bibliography: pages 110-125.
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Department of Biological Sciences
2016
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| _version_ | 1867614242691088384 |
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| access_status_str | Open Access |
| author | Lipschitz, Steven Richard |
| author2 | Brown, Alec C |
| author_browse | Brown, Alec C Lipschitz, Steven Richard |
| author_facet | Brown, Alec C Lipschitz, Steven Richard |
| author_sort | Lipschitz, Steven Richard |
| collection | Thesis |
| description | Bibliography: pages 110-125. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/21850 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:48:56.209Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Biological Sciences |
| publisherStr | Department of Biological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/21850 Aspects of the sensitivity of juvenile Jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil Lipschitz, Steven Richard Brown, Alec C Zoology Bibliography: pages 110-125. 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. 2016-09-20T12:35:02Z 2016-09-20T12:35:02Z 1983 Master Thesis Masters MSc http://hdl.handle.net/11427/21850 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Zoology Lipschitz, Steven Richard Aspects of the sensitivity of juvenile Jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil |
| thesis_degree_str | Master's |
| title | Aspects of the sensitivity of juvenile Jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil |
| title_full | Aspects of the sensitivity of juvenile Jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil |
| title_fullStr | Aspects of the sensitivity of juvenile Jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil |
| title_full_unstemmed | Aspects of the sensitivity of juvenile Jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil |
| title_short | Aspects of the sensitivity of juvenile Jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil |
| title_sort | aspects of the sensitivity of juvenile jasus lalandii and decapod excitable tissue to the water soluble fraction of crude oil |
| topic | Zoology |
| url | http://hdl.handle.net/11427/21850 |
| work_keys_str_mv | AT lipschitzstevenrichard aspectsofthesensitivityofjuvenilejasuslalandiianddecapodexcitabletissuetothewatersolublefractionofcrudeoil |