Antarctic Legacy Archive

Breeding numbers and success of Eudyptes penguins at Marion Island, and the influence of mass and time of arrival of adults

Show simple item record

dc.contributor.author Dyer, B.M.
dc.contributor.author Crawford, R.J.M.
dc.contributor.author Cooper, J.
dc.contributor.author Underhill, L.G.
dc.coverage.spatial sub-Antarctic
dc.coverage.spatial Marion Island
dc.date.accessioned 2021-03-10T09:25:42Z
dc.date.available 2021-03-10T09:25:42Z
dc.date.created 2007/10/09
dc.date.issued 2007/10/09
dc.identifier.uri http://hdl.handle.net/123456789/28555
dc.description.abstract At Marion Island, numbers of macaroni penguins Eudyptes chrysolophus and especially eastern rockhopper penguins E. chrysocome filholi have been decreasing. For both species the time of arrival of females for breeding, and for rockhopper penguins the mass of females on arrival, was significantly related to breeding success(1). Therefore, over-wintering conditions appear to influence breeding success. The mass on arrival of macaroni penguins has fluctuated around a constant level, but was noticeably poor following the El Nino of 1997/98(2). The mass of returning rockhopper penguins has been decreasing, so that they now commence breeding in a poorer condition than previously. In 2007, instruments were attached to some birds at the conclusion of their moult to investigate the direction of travel to the winter feeding grounds. One male macaroni and two unsexed rockhopper penguins moved to the southeast, whereas three macaroni penguins of both sexes travelled south or southwest. The male macaroni penguins travelled farther than the female in the same time. Should winter food be displaced to the south, the condition of female macaroni penguins returning to breed may also deteriorate. en_ZA
dc.description.sponsorship Sponsored by the the Department of Science and Innovation(DSI) through National Research Foundation (NRF) - South Africa en_ZA
dc.description.statementofresponsibility Antarctic Legacy of South Africa en_ZA
dc.format PDF en_ZA
dc.language English en_ZA
dc.publisher South African National Antarctic Programme (SANAP) en_ZA
dc.relation SANAP Symposium 2007 en_ZA
dc.relation.ispartof ARESSA THEME III: Biodiversity: Responses to Earth System Variability (Posters) en_ZA
dc.rights Copyright en_ZA
dc.rights Copyright en_ZA
dc.subject Research en_ZA
dc.subject Science en_ZA
dc.subject Meetings en_ZA
dc.subject Symposium en_ZA
dc.subject SANAP Symposium 2007 en_ZA
dc.subject sub-Antarctic en_ZA
dc.subject Marion Island en_ZA
dc.subject Living Systems en_ZA
dc.subject Marine Science en_ZA
dc.subject Research en_ZA
dc.subject Zoology en_ZA
dc.subject Fauna en_ZA
dc.subject Ornithology en_ZA
dc.subject Birds en_ZA
dc.subject Penguins en_ZA
dc.subject Macaroni Penguins en_ZA
dc.subject Rockhopper Penguins en_ZA
dc.subject Breeding en_ZA
dc.subject Breeding Success en_ZA
dc.title Breeding numbers and success of Eudyptes penguins at Marion Island, and the influence of mass and time of arrival of adults en_ZA
dc.type Abstracts en_ZA
dc.rights.holder Antarctic Legacy of South Africa en_ZA
dc.rights.holder Dyer, B.M. en_ZA
dc.rights.holder Crawford, R.J.M. en_ZA
dc.rights.holder Cooper, J. en_ZA
dc.rights.holder Underhill, L.G. en_ZA
iso19115.mdconstraints.uselimitation This item and the content of this website are subject to copyright protection. Reproduction of the content, or any part of it, other than for research, academic or non-commercial use is prohibited without prior consent from the copyright holder. en_ZA
iso19115.mddistributor.distributorcontact South African National Antarctic Programme (SANAP) en_ZA
iso19115.mdformat.name PDF en_ZA
iso19115.mdidentification.deliverypoint Antarctic Legacy of South Africa, Faculty of Science, Private Bag X1, Matieland. Stellenbosch. South Africa. en_ZA
iso19115.mdidentification.electronicmailaddress antarcticlegacy@sun.ac.za en_ZA
iso19115.mdidentification.organizationname Department of Environmental Affairs and Tourism en_ZA
iso19115.mdidentification.organizationname University of Cape Town en_ZA


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search ALSA



Browse

My Account

Statistics