Penguins and purse-seiners : competition or co-existence?

Simple item page
dc.contributor.authorBroni, Stephen Christopheren_ZA
dc.date.accessioned2014-09-22T07:56:33Z
dc.date.available2014-09-22T07:56:33Z
dc.date.issued1985en_ZA
dc.descriptionBibliography: leaves 110-124.en_ZA
dc.description.abstractThe relationships between the pelagic purse-seine fishery and Jackass penguins (Spheniscus demersus) were investigated at Saldanha Bay, on the south-western coast of South Africa, between December 1982 and August 1983. The distribution at sea and the foraging behaviour of Jackass Penguins were examined by running standard transects with a sail boat in waters close to the birds' breeding islands. The use of a sail boat permitted close observation of foraging penguins with minimal disturbance. Penguin numbers at sea were lowest in December, when birds were confined to the breeding islands during moulting and were high in March and July during breeding peaks. While most penguin group sizes were small (one or two birds), over 44 % of penguins occurred in groups of more than 10 birds. Three stereotypic penguin group formations occurred: 'facing-search', 'line-abreast', and 'pointed-ovoid'. Penguins also foraged in association with other sea birds and marine mammals.en_ZA
dc.identifier.apacitationBroni, S. C. (1985). <i>Penguins and purse-seiners : competition or co-existence?</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/7611en_ZA
dc.identifier.chicagocitationBroni, Stephen Christopher. <i>"Penguins and purse-seiners : competition or co-existence?."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1985. http://hdl.handle.net/11427/7611en_ZA
dc.identifier.citationBroni, S. 1985. Penguins and purse-seiners : competition or co-existence?. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Broni, Stephen Christopher AB - The relationships between the pelagic purse-seine fishery and Jackass penguins (Spheniscus demersus) were investigated at Saldanha Bay, on the south-western coast of South Africa, between December 1982 and August 1983. The distribution at sea and the foraging behaviour of Jackass Penguins were examined by running standard transects with a sail boat in waters close to the birds' breeding islands. The use of a sail boat permitted close observation of foraging penguins with minimal disturbance. Penguin numbers at sea were lowest in December, when birds were confined to the breeding islands during moulting and were high in March and July during breeding peaks. While most penguin group sizes were small (one or two birds), over 44 % of penguins occurred in groups of more than 10 birds. Three stereotypic penguin group formations occurred: 'facing-search', 'line-abreast', and 'pointed-ovoid'. Penguins also foraged in association with other sea birds and marine mammals. DA - 1985 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1985 T1 - Penguins and purse-seiners : competition or co-existence? TI - Penguins and purse-seiners : competition or co-existence? UR - http://hdl.handle.net/11427/7611 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/7611
dc.identifier.vancouvercitationBroni SC. Penguins and purse-seiners : competition or co-existence?. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1985 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/7611en_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.titlePenguins and purse-seiners : competition or co-existence?en_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
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_sci_1985_broni_sc.pdf
Size:
3.49 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters