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

 

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dc.contributor.author Broni, Stephen Christopher en_ZA
dc.date.accessioned 2014-09-22T07:56:33Z
dc.date.available 2014-09-22T07:56:33Z
dc.date.issued 1985 en_ZA
dc.identifier.citation Broni, S. 1985. Penguins and purse-seiners : competition or co-existence?. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/7611
dc.description Bibliography: leaves 110-124. en_ZA
dc.description.abstract 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. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Zoology en_ZA
dc.title Penguins and purse-seiners : competition or co-existence? en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Biological Sciences en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Broni, 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/11427/7611 en_ZA
dc.identifier.chicagocitation Broni, 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/11427/7611 en_ZA
dc.identifier.vancouvercitation Broni 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/11427/7611 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


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