Tuesday 21 May
Amsterdam albatross (Diomedea amsterdamensis)
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Amsterdam albatross fact file
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Amsterdam albatross description
The Amsterdam albatross is an extremely large albatross that breeds only on Amsterdam Island in the southern Indian Ocean (4). When first described in the early 1980s it was believed by some to be a subspecies of the wandering albatross (Diomedea exulans) (5). This ‘great albatross’ (Diomedea) breeds in a brown plumage, rather than the more usual white (4). Adults have almost entirely chocolate-brown upper parts, a white face and throat, a broad brown breast-band, a white lower breast and belly, and brown undertail-coverts. The underwing is white, with a dark tip (6).Top
Amsterdam albatross biology
Males arrive at the breeding site before females, with most pairs nesting in February and March (7) (8). A single egg is laid (7), as with all albatrosses, and both parents incubate the egg in stints that last a week (8). The chick hatches after 80 days, is brooded for a month and fledges after approximately 235 days (7) (8). The chick is fed initially every three days by its parents and, at the peak of weight gain, will weigh more than its parents (8). Individuals reach sexual maturity at around nine years, although they often return to the island a few years before then (7) (8). Average life expectancy is 30 to 40 years (6).Top
Amsterdam albatross range
The breeding of the Amsterdam albatross is restricted to the Plateau des Tourbieres on Amsterdam Island in the southern Indian Ocean (7). During the breeding season birds forage both around Amsterdam Island and up to 2,200 kilometres away in subtropical waters, but non-breeding dispersal is unknown (6).Top
Amsterdam albatross habitat
This marine, highly pelagic albatross spends the majority of its life out at sea, coming to land only to breed (2). Nesting occurs on a highland plateau at 470 to 640 meters in an area of peat bog that has an ample covering of moss (2) (7).Top
Amsterdam albatross statusTop
Amsterdam albatross threats
This rare albatross has been imperilled by a number of human and non-human related activities, and now clings to an extremely precarious existence of just 70 to 90 individuals and 10 to 20 annually breeding pairs (2) (7). A large herd of 1,200 feral cattle have destroyed the vegetation cover at lower altitudes on Amsterdam Island, reducing this species’ available breeding ground. Introduced predators also pose a major threat, particularly feral cats, and Amsterdam Island has suffered from fires started by humans, which destroy vegetation and possibly birds (2) (9). The effects of longline fisheries around the island in the 1970s and early 1980s may also be to blame for the serious decline in numbers (4) (10). Although population numbers have recently been increasing, a continued decline is projected owing to the potential spread of certain diseases (Avian cholera and Erysipelothrix rhusiopathidae) that affect the Indian yellow-nosed albatross (Thalassarche carteri) population on the same island (1) (4). Indeed, increased chick mortality over recent years suggests that the Amsterdam albatross population has already been affected (4).Top
Amsterdam albatross conservation
The Amsterdam albatross is listed on Appendix I on the Convention on Migratory Species (CMS), which strives towards protecting migratory animals, conserving or restoring their habitat and controlling factors that might endanger them (3). It is also on Annex 1 of the Agreement on the Conservation of Albatrosses and Petrels (ACAP) (11). All Amsterdam albatrosses are banded and the population is monitored every year. In 1987 the number of cattle was reduced and a fence erected to partition off part of the island, and in 1992 a second fence was built to provide complete protection from cattle in the high plateau (4) (9). Access to the colony by humans is also now under strict control (2). Further proposals include the management of vegetation to increase suitable nesting ground, investigation into the impact of cats and means of removing these predators, raising awareness of bycatch problems amongst longline fishers and research into methods of preventing the spread of disease (4) (10). All these issues need to be urgently addressed if we are to ensure the future of this bird, which is one of the rarest and most endangered of all albatrosses and currently in grave danger of extinction.Top
Find out more
For further information on the Amsterdam albatross see:
Save the Albatross:
Authenticated (28/08/2007) by Pierre Jouventin, National Centre of Scientific Research, Centre d’Ecologie Fonctionnelle et Evolutive, Montpellier, France.Top
- In birds, to protect young by covering with the body or wings.
- In the fishing industry, the part of the catch made up of non-target species.
- Diverse group of arthropods (a phylum of animals with jointed limbs and a hard chitinous exoskeleton) characterised by the possession of two pairs of antennae, one pair of mandibles (parts of the mouthparts used for handling and processing food) and two pairs of maxillae (appendages used in eating, which are located behind the mandibles). Includes crabs, lobsters, shrimps, slaters, woodlice and barnacles.
- In birds, applied to sea birds that come to land only to breed, and that spend the major part of their lives out at sea.
- A population usually restricted to a geographical area that differs from other populations of the same species, but not to the extent of being classified as a separate species.
IUCN Red List (March, 2008)
UNEP-WCMC (March, 2008)
Global Register of Migratory Species (March, 2008)
BirdLife International (October, 2005)
- Jouventin, P. and Roux, J.P. (1983) Discovery of a new albatross. Nature, 305: 181.
- Stattersfield, A.J. and Capper, D.R. (2000) Threatened Species of the World. Lynx Edicions, Barcelona and BirdLife International, Cambridge.
Ocean Wanderers (October, 2005)
- Jouventin, P., Martinex, L. and Roux, J.P. (1989) Breeding biology and current status of the Amsterdam Island albatross Diomedea amsterdamensis. Ibis, 131: 171 - 189.
- Micol, T. and Jouventin, P. (1995) Restoration of Amsterdam Island, south Indian Ocean, following control of feral cattle. Biological Conservation, 72: 199 - 206.
- Weimerskirch, H., Brothers, N. and Jouventin, P. (1997) Population dynamics of wandering albatrosses Diomedea exulans and Amsterdam albatross D. amsterdamensis in the Indian Ocean and their relationship with longline fisheries: conservation implications. Biological Conservation, 79: 257 - 270.
Agreement on the Conservation of Albatrosses and Petrels (October, 2005)
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