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Exploitation of mesoscale oceanographic features by grey-headed albatross Thalassarche chrysostoma in the southern Indian Ocean
Breeding grey-headed albatross Thalassarche chrysostoma, tracked from Marion Island (Prince Edward Islands) during November-December 1997 and January-February 1998, showed a strong association withExpand
Trends in numbers of Cape gannets (Morus capensis), 1956/1957-2005/2006, with a consideration of the influence of food and other factors
Crawford, R. J. M., Dundee, B. L., Dyer, B. M., Klages, N. T., Meyer, M. A., and Upfold, L. 2007. Trends in numbers of Cape gannets (Morus capensis), 1956/57-2005/06, with a consideration of theExpand
Comparative analysis of the diets of smaller odontocete cetaceans along the coast of southern Africa
Most Odontoceti fed on commercially unexploited cephalopods and fish, or on fish below commercially utilized sizes, but the average sizes of anchovy and pilchard eaten by Delphinus delphis and Lagenorhynchus obscurus were larger than the sizes most frequently taken commercially. Expand
Trends of African penguin Spheniscus demersus populations in the 20th century
The entire nesting population of African penguins Spheniscus demersus was about 575 000 adults at the start of the 20th century. Numbers halved by the 1950s and continued to fall to about 220 000 byExpand
Diet and estimated food consumption of Antarctic fur seals at Bouvetøya during summer
Abstract Collection and analysis of natural regurgitations and fresh scats, deposited by Antarctic fur seals at the Nyrøysa colony, Bouvetøya, during December 1998 to February 1999, afforded aExpand
African penguins as predators and prey – coping (or not) with change
Stochastic modelling suggests that colonies of 10 000 pairs have a 9% probability of extinction in 100 years, so smaller populations should be regarded as "Vulnerable", however, in a period of prolonged food scarcity off southern Namibia, the regional population decreased from more than 40 000 pairs in 1956 to about 1 500 pairs in 2000, and many colonies numbering less than 1 000 pairs became extinct. Expand
Seasonal variation in the diet of the king penguin (Aptenodytes patagonicus) at sub‐Antarctic Marion Island
The diet of the king penguin Aptenodytes patagonicus at Marion Island was examined throughout the year by analysis of stomach samples for the first time that mesopelagic myctophid fish have been shown to comprise a major component of the diet of a vertebrate predator in the Southern Ocean. Expand
Fish prey of fur seals Arctocephalus spp. at subantarctic Marion Island
Seal diets overlapped substantially with those of the king penguins resident on Marion Island, but no evidence for competitive exclusion could be found between these two major warmblooded consumers of marine resources at the Prince Edward Islands. Expand
Foraging interactions between Wandering Albatrosses Diomedea exulans breeding on Marion Island and long‐line fisheries in the southern Indian Ocean
The foraging distribution of Marion Island birds showed most spatial overlap with birds from the neighbouring Crozet Islands during the late chick-rearing and non-breeding periods, which coincided with areas of intense tuna long-line fishing south of Africa. Expand