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


Show simple item record Broni, Stephen Christopher en_ZA 2014-09-22T07:56:33Z 2014-09-22T07:56:33Z 1985 en_ZA
dc.identifier.citation Broni, S. 1985. Penguins and purse-seiners : competition or co-existence?. University of Cape Town. en_ZA
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 Thesis / Dissertation en_ZA
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 en_ZA
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image

Files in this item

This item appears in the following Collection(s)

Show simple item record