Probiotic effect of Vibrio midae SY9, Cryptococcus sp. SS1 and Debaryomyces hansenii AY1 on the growth and disease resistance of farmed Haliotis midae

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dc.contributor.advisorCoyne, Vernonen_ZA
dc.contributor.authorMacey, Brett Men_ZA
dc.date.accessioned2015-09-15T10:19:17Z
dc.date.available2015-09-15T10:19:17Z
dc.date.issued2005en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractAlthough the South African abalone, Haliotis midae, has been commercially harvested since 1949, successful cultivation of this species only began in the 1980s. Since then, the abalone mariculture industry has expanded dramatically and currently produces between 500 and 800 tons of abalone per year with a net farm gate value of approximately R125 million. However, disease has had a severe impact on the international aquaculture industry and is anticipated to become an increasingly important factor, together with the slow growth rate of H. midae, that will negatively impact on the further development and success of the local abalone mariculture industry. Thus, the future of H. midae mariculture in South Africa depends in part on the development of methods to enhance the growth rate and disease resistance of farmed H. midae. Erasmus et al. (1997) showed that abalone enteric bacteria enhanced digestive efficiency by secreting polysaccharolytic enzymes and it was suggested from these results that these bacterial enzymes could affect the growth rate of abalone. Furthermore, an overwhelming body of evidence has shown that probiotic microorganisms can significantly improve the growth rate and disease resistance of aquacultured animals. The aim of this study was to isolate enteric microorganisms from H. midae that are capable of hydrolyzing the various protein and starch substrates included in formulated abalone feeds. Upon identification, the selected microbes would be tested for their ability to colonize the digestive tract, improve digestion, growth and immunity of farmed H. midae.en_ZA
dc.identifier.apacitationMacey, B. M. (2005). <i>Probiotic effect of Vibrio midae SY9, Cryptococcus sp. SS1 and Debaryomyces hansenii AY1 on the growth and disease resistance of farmed Haliotis midae</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Molecular and Cell Biology. Retrieved from http://hdl.handle.net/11427/13954en_ZA
dc.identifier.chicagocitationMacey, Brett M. <i>"Probiotic effect of Vibrio midae SY9, Cryptococcus sp. SS1 and Debaryomyces hansenii AY1 on the growth and disease resistance of farmed Haliotis midae."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Molecular and Cell Biology, 2005. http://hdl.handle.net/11427/13954en_ZA
dc.identifier.citationMacey, B. 2005. Probiotic effect of Vibrio midae SY9, Cryptococcus sp. SS1 and Debaryomyces hansenii AY1 on the growth and disease resistance of farmed Haliotis midae. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Macey, Brett M AB - Although the South African abalone, Haliotis midae, has been commercially harvested since 1949, successful cultivation of this species only began in the 1980s. Since then, the abalone mariculture industry has expanded dramatically and currently produces between 500 and 800 tons of abalone per year with a net farm gate value of approximately R125 million. However, disease has had a severe impact on the international aquaculture industry and is anticipated to become an increasingly important factor, together with the slow growth rate of H. midae, that will negatively impact on the further development and success of the local abalone mariculture industry. Thus, the future of H. midae mariculture in South Africa depends in part on the development of methods to enhance the growth rate and disease resistance of farmed H. midae. Erasmus et al. (1997) showed that abalone enteric bacteria enhanced digestive efficiency by secreting polysaccharolytic enzymes and it was suggested from these results that these bacterial enzymes could affect the growth rate of abalone. Furthermore, an overwhelming body of evidence has shown that probiotic microorganisms can significantly improve the growth rate and disease resistance of aquacultured animals. The aim of this study was to isolate enteric microorganisms from H. midae that are capable of hydrolyzing the various protein and starch substrates included in formulated abalone feeds. Upon identification, the selected microbes would be tested for their ability to colonize the digestive tract, improve digestion, growth and immunity of farmed H. midae. DA - 2005 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2005 T1 - Probiotic effect of Vibrio midae SY9, Cryptococcus sp. SS1 and Debaryomyces hansenii AY1 on the growth and disease resistance of farmed Haliotis midae TI - Probiotic effect of Vibrio midae SY9, Cryptococcus sp. SS1 and Debaryomyces hansenii AY1 on the growth and disease resistance of farmed Haliotis midae UR - http://hdl.handle.net/11427/13954 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/13954
dc.identifier.vancouvercitationMacey BM. Probiotic effect of Vibrio midae SY9, Cryptococcus sp. SS1 and Debaryomyces hansenii AY1 on the growth and disease resistance of farmed Haliotis midae. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Molecular and Cell Biology, 2005 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/13954en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Molecular and Cell Biologyen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMolecular and Cell Biologyen_ZA
dc.titleProbiotic effect of Vibrio midae SY9, Cryptococcus sp. SS1 and Debaryomyces hansenii AY1 on the growth and disease resistance of farmed Haliotis midaeen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameDPhilen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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