An investigation of protein variation in Ulva lactuca and Ulva rigida under high nitrogen culture conditions
| dc.contributor.advisor | Bolton, John J | en_ZA |
| dc.contributor.author | Wilkinson, Sarah | en_ZA |
| dc.date.accessioned | 2017-10-25T08:32:24Z | |
| dc.date.available | 2017-10-25T08:32:24Z | |
| dc.date.issued | 2001 | en_ZA |
| dc.date.updated | 2017-02-17T08:38:35Z | |
| dc.description.abstract | In the light of findings that abalone achieve higher growth rates when fed on high protein diets, this study attempts to increase the protein content of two macroalgae under culture conditions. Ulva lactuca and U rigida were grown in saturating NH₄⁺ - N (1 mM) and PO₄³⁻P (70 μM ) concentrations. Of the two, protein levels of U. lactuca showed the greatest increase over time. Natural populations had a content of 3.7 % of dry weight. This increased significantly (p <0.05) to a maximum value of 4.5 % after 8 days growth in nutrient enriched conditions. The protein content of U. rigida increased significantly from 3.3 % to 3.9 % after 6 days of growth in nutrient enriched conditions. An interspecies comparison was made using the intertidal species Porphyra capensis, Ulva capensis and Gracilaria gracilis. The highest protein content was found in P. capensis (11.5 %), followed by U capensis (3.0 %) and G. gracilis (2.7 %). Results indicate the suitability of P. capensis as a high-protein abalone fodder. Furthermore, results suggest that the protein content of abalone fodder may be optimized under aquaculture conditions. | en_ZA |
| dc.identifier.apacitation | Wilkinson, S. (2001). <i>An investigation of protein variation in Ulva lactuca and Ulva rigida under high nitrogen culture conditions</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/25786 | en_ZA |
| dc.identifier.chicagocitation | Wilkinson, Sarah. <i>"An investigation of protein variation in Ulva lactuca and Ulva rigida under high nitrogen culture conditions."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2001. http://hdl.handle.net/11427/25786 | en_ZA |
| dc.identifier.citation | Wilkinson, S. 2001. An investigation of protein variation in Ulva lactuca and Ulva rigida under high nitrogen culture conditions. University of Cape Town. | en_ZA |
| dc.identifier.ris | TY - Thesis / Dissertation AU - Wilkinson, Sarah AB - In the light of findings that abalone achieve higher growth rates when fed on high protein diets, this study attempts to increase the protein content of two macroalgae under culture conditions. Ulva lactuca and U rigida were grown in saturating NH₄⁺ - N (1 mM) and PO₄³⁻P (70 μM ) concentrations. Of the two, protein levels of U. lactuca showed the greatest increase over time. Natural populations had a content of 3.7 % of dry weight. This increased significantly (p <0.05) to a maximum value of 4.5 % after 8 days growth in nutrient enriched conditions. The protein content of U. rigida increased significantly from 3.3 % to 3.9 % after 6 days of growth in nutrient enriched conditions. An interspecies comparison was made using the intertidal species Porphyra capensis, Ulva capensis and Gracilaria gracilis. The highest protein content was found in P. capensis (11.5 %), followed by U capensis (3.0 %) and G. gracilis (2.7 %). Results indicate the suitability of P. capensis as a high-protein abalone fodder. Furthermore, results suggest that the protein content of abalone fodder may be optimized under aquaculture conditions. DA - 2001 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2001 T1 - An investigation of protein variation in Ulva lactuca and Ulva rigida under high nitrogen culture conditions TI - An investigation of protein variation in Ulva lactuca and Ulva rigida under high nitrogen culture conditions UR - http://hdl.handle.net/11427/25786 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/25786 | |
| dc.identifier.vancouvercitation | Wilkinson S. An investigation of protein variation in Ulva lactuca and Ulva rigida under high nitrogen culture conditions. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2001 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/25786 | en_ZA |
| dc.language.iso | eng | en_ZA |
| dc.publisher.department | Department of Biological Sciences | en_ZA |
| dc.publisher.faculty | Faculty of Science | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.subject.other | Botany | en_ZA |
| dc.title | An investigation of protein variation in Ulva lactuca and Ulva rigida under high nitrogen culture conditions | en_ZA |
| dc.type | Bachelor Thesis | |
| dc.type.qualificationlevel | Honours | |
| dc.type.qualificationname | BSc (Hons) | en_ZA |
| uct.type.filetype | ||
| uct.type.filetype | Text | |
| uct.type.filetype | Image | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Thesis | en_ZA |