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Location High Seas
Central coordinates 58o 38.71' West  43o 4.78' South
IBA criteria A1, A4ii, A4iii
Area 339,731 ha
Year of IBA assessment 2012

Site description This Marine IBA is identified using tracking data. It falls within High Seas International Waters and the Atlantic, Southwest FAO ocean region. The site covers an area of 3397 km2 and is 406 km away from the closet coastline. The depth ranges from 1039 to 2000 m, mean annual sea surface temperature falls between 8.04 and 8.67 °C and mean annual chlorophyll-a concentrations found to range between 0.46 and 1.18 mg/m3.

Key Biodiversity 2 species trigger IBA criteria at this Marine IBA. BirdLife analyses of tracking data estimates that 1534-1342 individuals of Wandering Albatross (VU) from South Georgia are present at the site during the Sabbatical (Oct-May) life-history stage. 2500000-900000 individuals of Great Shearwater (LC) from Tristan da Cunha Islands are present at the site during the Non-breeding (Jan-Mar) life-history stage.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Wandering Albatross Diomedea exulans sabbatical (non-breeding)  2003  1,342-1,534 individuals  A1, A4ii  Vulnerable 
Great Shearwater Ardenna gravis non-breeding  2006  900,000-2,500,000 individuals  A4ii  Least Concern 
A4iii Species group - seabirds non-breeding  901,342-2,501,534 individuals  A4iii   


IUCN habitat Habitat detail Extent (% of site)
Sea   100%

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Atlantic, Southwest 28 - Marine. Downloaded from on 22/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife