Indian yellow-nosed albatross | |
---|---|
Off the south-east coast of Tasmania | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Procellariiformes |
Family: | Diomedeidae |
Genus: | Thalassarche |
Species: | T. carteri |
Binomial name | |
Thalassarche carteri (Rothschild, 1903) | |
Synonyms | |
Thalassarche chlororhynchos carteri Contents |
The Indian yellow-nosed albatross (Thalassarche carteri) is a member of the albatross family, and is the smallest of the mollymawks. In 2004, BirdLife International [2] split this species from the Atlantic yellow-nosed albatross; however Clements [3] has not split it yet, and the SACC has not either, but recognises the need for a proposal. [4]
Mollymawks are a type of albatross that belong to the family Diomedeidae of the order Procellariiformes, along with shearwaters, fulmars, storm petrels, and diving petrels. They share certain identifying features. They have nasal passages called naricorns attached to the upper bill. The bills of Procellariiformes are unique in that they are split into between seven and nine horny plates. They make a stomach oil made of wax esters and triglycerides that is stored in the proventriculus. This is used against predators and as an energy rich food source for chicks and for the adults during their long flights. [5] They have a salt gland above the nasal passage. It helps desalinate their bodies, due to the high amount of ocean water that they imbibe. [6] The type-specimen is a black-beaked juvenile, which has caused confusion over its status until recently. [7]
The Indian yellow-nosed albatross weighs 2.55 kg (5.6 lb), is 76 cm (30 in) [8] long and is 2 m (6.6 ft) across the wings. [9] The adult has a pale grey or white head and nape, with a dark grey mantle, upperwing, and tail. Its rump and underparts are white, and its underwing is white with a black tip with a narrow black margin at the leading edge. Its bill is black with a yellow upper ridge and a red tip. The juvenile has a white head and all black bill. [8] It is difficult to distinguish from the closely related grey-headed albatross and Atlantic yellow-nosed albatross, the latter with which it was long considered conspecific and is still considered by some a subspecies of. It can be distinguished from the Atlantic yellow-nosed by its head, the grey plumage of which is lighter on the Indian yellow-nosed.
Like all albatrosses, the Indian yellow-nosed albatross is a colonial breeder. It breeds annually, [8] and the adults begin breeding at the age of eight years. A mud nest is built in bare rocky areas or in tussock grass or ferns, [8] [10] and a single egg is laid. The nesting season begins in August, with laying occurring around September/October. Incubation lasts around 70 days. After hatching the chick takes around 115 days to fledge.
It feeds on fish, crustaceans and cephalopods. [8] [11]
Location | Population | Date | Trend |
---|---|---|---|
Amsterdam Island | 27,000 pair | 1997 | Declining |
Prince Edward Islands | 7,500 pair | 2002 | Stable |
Crozet Island | 7,030 pair | 2007 | |
Kerguelen Island | 50 pair | 1998 | |
Île Saint-Paul | 3 pair | 2007 | |
Total | 65,000 | 2004 | Declining |
It breeds on Prince Edward Islands, the Crozet Islands, Kerguelen Island, Amsterdam Island (on the Falaises d'Entrecasteaux) and St Paul Islands in the Indian Ocean. When feeding during incubation, birds will forage up to 1,500 km (930 mi) from the colony. [12] At sea it ranges from South Africa to the Pacific Ocean just beyond New Zealand, ranging from 30° S to 50° S. [8] [13]
It is considered to be an endangered species by the IUCN, [1] due to dramatic declines in the last seventy years, caused by interactions with longline fisheries and the outbreak of introduced diseases, such as avian cholera and Erysipelothrix rhusiopathiae . [14] It has an occurrence range of 35,300,000 km2 (13,600,000 sq mi) and a breeding range of 1,400 km2 (540 sq mi). A 2004 population estimate established that around a total of 65,000 adult birds are alive. This is based on earlier counts as follows: 27,000 breeding pairs breed on Amsterdam Island, [15] and 7,500 pair on Prince Edward Island, [14] 7,030 on Crozet Island, [16] 50 on Kerguelen Island, [17] and 3 pair on St. Paul Island for a total of 41,580 pair or 83,000 mature individuals. Take into account decreasing trends for the stated number.
Monitoring of the birds and studying of its foraging is an ongoing project on Amsterdam Island, and Prince Edward Islands is a nature preserve. A vaccination has been developed but remains untested. [14] Finally, in 2006, the Indian Ocean Tuna Commission adopted a measure to require longline boats to use a bird streamer south of 30°S, and South Africa requires its boats to use a variety of mitigation processes. [8]
The black-browed albatross, also known as the black-browed mollymawk, is a large seabird of the albatross family Diomedeidae; it is the most widespread and common member of its family.
The Chatham albatross, also known as the Chatham mollymawk or Chatham Island mollymawk, is a medium-sized black-and-white albatross which breeds only on The Pyramid, a large rock stack in the Chatham Islands, New Zealand (Aotearoa). It is sometimes treated as a subspecies of the shy albatross Thalassarche cauta. It is the smallest of the shy albatross group.
The mollymawks are a group of medium-sized albatrosses that form the genus Thalassarche. The name has sometimes been used for the genus Phoebetria as well, but these are usually called sooty albatrosses. They are restricted to the Southern Hemisphere, where they are the most common of the albatrosses. They were long considered to be in the same genus as the great albatrosses, Diomedea, but a study of their mitochondrial DNA showed that they are a monophyletic taxon related to the sooty albatrosses, and they were placed in their own genus.
Salvin's albatross or Salvin's mollymawk, is a large seabird that breeds mainly on the Bounty Islands of New Zealand, with scant amounts on islands across the Southern Ocean. A medium-sized mollymawk, it was long considered to be a subspecies of the shy albatross.
The sooty albatrosses are small albatrosses from the genus Phoebetria. There are two species, the sooty albatross, Phoebetria fusca, and the light-mantled albatross, Phoebetria palpebrata.
The sooty albatross, also known to sailors as the Quaker, is a species of marine bird belonging to the albatross family Diomedeidae. It is a medium-sized albatross that sports a sooty-brown or sooty-black color. It can be found in the southern Atlantic Ocean, the southern Indian Ocean, and the Southern Ocean. This bird scavenges for squid, fish, and carrion. Like other albatrosses, these birds mate for life and return to the same breeding spots every season. A single pair will mate every other year on a variety of islands in the southern Atlantic Ocean and the southern Indian Ocean islands. This bird is an endangered species and conservation efforts are taking place.
The Amsterdam albatross or Amsterdam Island albatross,, is a large albatross which breeds only on Amsterdam Island in the southern Indian Ocean. It was only described in 1983, and was thought by some researchers to be a subspecies of the wandering albatross, D. exulans. BirdLife International and the IOC recognize it as a species, James Clements does not, and the SACC has a proposal on the table to split the species. More recently, mitochondrial DNA comparisons between the Amsterdam albatross, the wandering albatross Diomedea exulans, the Antipodean albatross D. antipodensis and the Tristan albatross D. dabbenena, provide clear genetic evidence that the Amsterdam albatross is a separate species.
The grey-headed albatross also known as the gray-headed mollymawk, is a large seabird from the albatross family. It has a circumpolar distribution, nesting on isolated islands in the Southern Ocean and feeding at high latitudes, further south than any of the other mollymawks. Its name derives from its ashy-gray head, throat and upper neck.
The Agreement on the Conservation of Albatrosses and Petrels (ACAP) is a legally binding international agreement signed in 2001 and entered into force on 1 February 2004 when South Africa ratified as the fifth Party to the Agreement.
The shy albatross, also known as shy mollymawk, is a medium-sized albatross that breeds on three remote islands off the coast of Tasmania, Australia, in the southern Indian Ocean. Its lifespan is about 60 years, and it has been seen as far afield as South Africa and the Pacific coast of the United States. As of June 2020, the species is listed as "Endangered" in Australia; there are thought to be 15,000 pairs of shy albatross left. It is Australia's only endemic albatross.
The white-capped albatross is a mollymawk that breeds on the islands off of New Zealand. Not all experts agree that this form should be recognized as a separate species from the shy albatross, Thalassarche cauta. It is a medium-sized black, slate gray, and white albatross and is the largest of the mollymawks.
Buller's albatross or Buller's mollymawk, is a small mollymawk in the albatross family.
The Campbell albatross or Campbell mollymawk, is a medium-sized mollymawk in the albatross family. It breeds only on Campbell Island and the associated islet of Jeanette Marie, in a small New Zealand island group in the South Pacific. It is sometimes considered a subspecies of the black-browed albatross. It is a medium-sized black and white albatross with a pale yellow iris.
The Atlantic yellow-nosed albatross is a large seabird in the albatross family Diomedeidae.
Albatrosses, of the biological family Diomedeidae, are large seabirds related to the procellariids, storm petrels, and diving petrels in the order Procellariiformes. They range widely in the Southern Ocean and the North Pacific. They are absent from the North Atlantic, although fossil remains of short-tailed albatross show they once lived there up to the Pleistocene, and occasional vagrants are found. Great albatrosses are among the largest of flying birds, with wingspans reaching up to 2.5–3.5 metres (8.2–11.5 ft) and bodies over 1 metre (3.3 ft) in length. The albatrosses are usually regarded as falling into four genera, but disagreement exists over the number of species.
The white-chinned petrel also known as the Cape hen and shoemaker, is a large shearwater in the family Procellariidae. It ranges around the Southern Ocean as far north as southern Australia, Peru and Namibia, and breeds colonially on scattered islands. The white-chinned petrel was formerly considered to be conspecific with the spectacled petrel.
The grey petrel, also called the brown petrel, pediunker or grey shearwater is a species of seabird in the Procellariidae, or petrel family. It is pelagic and occurs in the open seas of the Southern Hemisphere, mainly between 32°S and 58°S.
The Southern Indian Ocean Islands tundra is a tundra ecoregion that includes several subantarctic islands in the southern Indian Ocean.
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