Factors influencing the development and mortality rate of shy and cat shark embryos in South African waters

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dc.contributor.advisorGriffiths, Charles Len_ZA
dc.contributor.authorPretorius, Carrie Annen_ZA
dc.date.accessioned2014-12-30T19:56:41Z
dc.date.available2014-12-30T19:56:41Z
dc.date.issued2012en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractThere are at least 500 species of sharks inhabiting the world's oceans and very little is known about the reproductive biology of most of these species. By observing Scyliorhinids, which exhibit oviparous reproductive behaviour, we can further understand the nature of elasmobranch reproductive behaviour, including embryo growth and development. Two Scyliorhinid species endemic to South African waters are investigated here, Poroderma pantherinum, commonly known as the Leopard catshark and Haploblepharus pictus the Dark shyshark. Observations were made both in the field and in the laboratory to ascertain differences in reproductive behaviour. In the field P. pantherinum laid their eggs at an average depth of 15.7 m - ? 28.8 and their preferred choice of substratum, onto which their eggs were singly attached, were seafans. H. pictus, on the other hand, laid their eggs at an average depth of 3.9 m - ? 15.9 and their preferred choice of substratum, onto which they attach their eggs predominantly in pairs, was the seaweed Bifurcariopis capensis.en_ZA
dc.identifier.apacitationPretorius, C. A. (2012). <i>Factors influencing the development and mortality rate of shy and cat shark embryos in South African waters</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/10662en_ZA
dc.identifier.chicagocitationPretorius, Carrie Ann. <i>"Factors influencing the development and mortality rate of shy and cat shark embryos in South African waters."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2012. http://hdl.handle.net/11427/10662en_ZA
dc.identifier.citationPretorius, C. 2012. Factors influencing the development and mortality rate of shy and cat shark embryos in South African waters. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Pretorius, Carrie Ann AB - There are at least 500 species of sharks inhabiting the world's oceans and very little is known about the reproductive biology of most of these species. By observing Scyliorhinids, which exhibit oviparous reproductive behaviour, we can further understand the nature of elasmobranch reproductive behaviour, including embryo growth and development. Two Scyliorhinid species endemic to South African waters are investigated here, Poroderma pantherinum, commonly known as the Leopard catshark and Haploblepharus pictus the Dark shyshark. Observations were made both in the field and in the laboratory to ascertain differences in reproductive behaviour. In the field P. pantherinum laid their eggs at an average depth of 15.7 m - ? 28.8 and their preferred choice of substratum, onto which their eggs were singly attached, were seafans. H. pictus, on the other hand, laid their eggs at an average depth of 3.9 m - ? 15.9 and their preferred choice of substratum, onto which they attach their eggs predominantly in pairs, was the seaweed Bifurcariopis capensis. DA - 2012 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2012 T1 - Factors influencing the development and mortality rate of shy and cat shark embryos in South African waters TI - Factors influencing the development and mortality rate of shy and cat shark embryos in South African waters UR - http://hdl.handle.net/11427/10662 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/10662
dc.identifier.vancouvercitationPretorius CA. Factors influencing the development and mortality rate of shy and cat shark embryos in South African waters. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2012 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/10662en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherZoologyen_ZA
dc.titleFactors influencing the development and mortality rate of shy and cat shark embryos in South African watersen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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