Title Influence of nest location, density and topography on breeding success in the black-browed albatross Thalassarche melanophris
Author Forster, I.P.; Phillips, R.A.
Author Affil Forster, I.P., Natural Environment Research Council, British Antarctic Survey, Cambridge, United Kingdom
Source Marine Ornithology, 37(3), p.213-217. Publisher: African Seabird Group, Rondebosch, South Africa. ISSN: 1018- 3337
Publication Date 2010
Notes In English GeoRef Acc. No: 309906
Index Terms Atlantic Ocean Islands--South Georgia; Atlantic Ocean Islands; Aves; behavior; Catharacta lonnbergi; Chordata; density; Diomedeidae; ecology; interspecific relations; Macronectes giganteus; population dynamics; predation; Procellariidae; reproduction; Scotia Sea Islands; South Georgia; Stercorariidae; Tetrapoda; Thalassarche melanophris; topography; Vertebrata
Abstract Examines relationships between characteristics and location of nesting sites within breeding colony, age structure, and short- and long-term reproductive output of breeders in colony at Bird Island, South Georgia, from 2004-06. Peripheral breeders perform considerably less well than core breeders, but nest position was not related to adult age. Timing of failure was affected by nest position, with peripheral nests significantly more likely than core nests to fail during chick rearing stage. Results suggest that predation by brown skuas and giant petrels is main cause of failure, as predators target more accessible nests on periphery of colonies. This behavior could potentially expose greater proportion of birds to predation if colony sizes diminish in tandem with decline in albatross populations currently being observed worldwide.
Publication Type journal article
Record ID 91534