An assessment of the use of the Jackass penguin as a sampler of the marine environment

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dc.contributor.authorLaugksch, Rudiger Cen_ZA
dc.date.accessioned2014-11-15T19:43:45Z
dc.date.available2014-11-15T19:43:45Z
dc.date.issued1989en_ZA
dc.descriptionBibliography: leaves 68-83.en_ZA
dc.description.abstractIn this thesis the use of the jackass penguin Spheniscus demersus as a sampler of the marine environment is assessed. Between February 1987 and July 1988, 638 monthly diet samples were obtained from adult jackass penguins at west - (Marcus and Jutten Islands) and southwest-coast (Dyer Island) colonies off South Africa, supplementing data collected since 1980. Penguin diet was compared over time and between colonies in order to establish the presence or absence of qualitative changes or quantified trends in the biology of pelagic schooling fish species important to the South African purseseine fishery, viz. anchovy Engraulis capensis, pilchard Sardinops ocellatus, maasbanker Trachurus trachurus and red-eye Etrumeus whiteheadii. The principal prey of jackass penguins and major contributor to commercial catches is anchovy and, consequently, the biology of this fish species was emphasized. Monthly and annual trends in prey composition and anchovy size-range were related to the availability, abundance and distribution of the penguins' prey species in the marine environment.en_ZA
dc.identifier.apacitationLaugksch, R. C. (1989). <i>An assessment of the use of the Jackass penguin as a sampler of the marine environment</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/9667en_ZA
dc.identifier.chicagocitationLaugksch, Rudiger C. <i>"An assessment of the use of the Jackass penguin as a sampler of the marine environment."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1989. http://hdl.handle.net/11427/9667en_ZA
dc.identifier.citationLaugksch, R. 1989. An assessment of the use of the Jackass penguin as a sampler of the marine environment. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Laugksch, Rudiger C AB - In this thesis the use of the jackass penguin Spheniscus demersus as a sampler of the marine environment is assessed. Between February 1987 and July 1988, 638 monthly diet samples were obtained from adult jackass penguins at west - (Marcus and Jutten Islands) and southwest-coast (Dyer Island) colonies off South Africa, supplementing data collected since 1980. Penguin diet was compared over time and between colonies in order to establish the presence or absence of qualitative changes or quantified trends in the biology of pelagic schooling fish species important to the South African purseseine fishery, viz. anchovy Engraulis capensis, pilchard Sardinops ocellatus, maasbanker Trachurus trachurus and red-eye Etrumeus whiteheadii. The principal prey of jackass penguins and major contributor to commercial catches is anchovy and, consequently, the biology of this fish species was emphasized. Monthly and annual trends in prey composition and anchovy size-range were related to the availability, abundance and distribution of the penguins' prey species in the marine environment. DA - 1989 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1989 T1 - An assessment of the use of the Jackass penguin as a sampler of the marine environment TI - An assessment of the use of the Jackass penguin as a sampler of the marine environment UR - http://hdl.handle.net/11427/9667 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/9667
dc.identifier.vancouvercitationLaugksch RC. An assessment of the use of the Jackass penguin as a sampler of the marine environment. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1989 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/9667en_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.titleAn assessment of the use of the Jackass penguin as a sampler of the marine environmenten_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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