Data Zone
Taxonomic source(s)
Brooke, M. de L. 2004. Albatrosses and Petrels Across the World. Oxford University Press, Oxford.
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
Robertson, C. J. R.; Nunn, G. B. 1998. Towards a new taxonomy for albatrosses. In: Robertson, G.; Gales, R. (ed.), Albatross biology and conservation, pp. 13-19. Surrey Beatty & Sons, Chipping Norton, Australia.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| A4ade | A4ade; B2ab(v) | A4ade; B2ab(v); C1+2a(ii); D2 |
| Year | Category | Criteria |
|---|---|---|
| 2018 | Critically Endangered | A4ade |
| 2016 | Critically Endangered | A4ade |
| 2015 | Critically Endangered | A4ade |
| 2013 | Critically Endangered | A4ade |
| 2012 | Critically Endangered | A4ade |
| 2010 | Critically Endangered | A4a,d,e |
| 2009 | Critically Endangered | A4a,d,e |
| 2008 | Critically Endangered | |
| 2007 | Endangered | |
| 2005 | Endangered | |
| 2004 | Endangered | |
| 2003 | Endangered | |
| 2000 | Endangered | |
| 1994 | Not Recognised | |
| 1988 | Not Recognised |
| Migratory status | full migrant | Forest dependency | does not normally occur in forest |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 54,900,000 km2 | medium |
| Extent of Occurrence (non-breeding) | 14,100,000 km2 | medium |
| Area of Occupancy (breeding/resident) | 80 km2 | medium |
| Number of locations | 1 | - |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 3400-4800 mature individuals | medium | estimated | 2010 |
| Population trend | decreasing | medium | estimated | 1955-2025 |
| Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 80-100% | - | - | - |
| Generation length | 28.7 years | - | - | - |
| Number of subpopulations | 2 | - | - | - |
| Percentage of mature individuals in largest subpopulation | 100% | - | - | - |
Population justification:
Breeding populations are essentially restricted to Gough Island, with 2-3 pairs nesting intermittently on Inaccessible Island (McClelland et al. 2016). The annual breeding population is currently estimated to be 1,250-1,750 pairs annually (RSPB and UCT unpubl. data), equivalent to a total population of 5200-7300 individuals for this biennially breeding species (RSPB and UCT unpubl. data). This roughly equates to 3,400-4,800 mature individuals.
Trend justification: Recent counts suggest that the population on Gough has decreased by 28% over 46 years, and at 3-5% annually between 2000 and 2016 (Cuthbert et al. 2014, RSPB and UCT unpubl. data), which is in line with population modelling predicting annual rates of decline of 2.9-5.3% (Ryan et al. 2001, Wanless et al. 2009). More recent population modelling, conducted over three generations since 1980, suggests a decline equivalent to a 96% reduction in population size over three generations, since declines began (BirdLife International unpubl. data). The rate of on-going decline is therefore placed here in the band 80-100% over three generations (86 years).
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Angola | extant | native | yes | |||
| Argentina | extant | native | yes | |||
| Brazil | extant | native | yes | |||
| High Seas | extant | native | yes | |||
| Namibia | extant | native | yes | |||
| South Africa | extant | native | yes | |||
| St Helena (to UK) | extant | native | yes | |||
| Uruguay | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| High Seas | Atlantic, Southeast 15 - Marine |
| High Seas | Atlantic, Southeast 16 - Marine |
| St Helena (to UK) | Gough Island |
| St Helena (to UK) | Inaccessible Island |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Marine Neritic | Macroalgal/Kelp | suitable | non-breeding |
| Marine Neritic | Macroalgal/Kelp | suitable | breeding |
| Marine Neritic | Pelagic | major | non-breeding |
| Marine Neritic | Pelagic | major | breeding |
| Marine Neritic | Seagrass (Submerged) | suitable | non-breeding |
| Marine Neritic | Seagrass (Submerged) | suitable | breeding |
| Marine Neritic | Subtidal Loose Rock/pebble/gravel | suitable | breeding |
| Marine Neritic | Subtidal Loose Rock/pebble/gravel | suitable | non-breeding |
| Marine Neritic | Subtidal Rock and Rocky Reefs | suitable | non-breeding |
| Marine Neritic | Subtidal Rock and Rocky Reefs | suitable | breeding |
| Marine Neritic | Subtidal Sandy | suitable | non-breeding |
| Marine Neritic | Subtidal Sandy | suitable | breeding |
| Marine Neritic | Subtidal Sandy-Mud | suitable | non-breeding |
| Marine Neritic | Subtidal Sandy-Mud | suitable | breeding |
| Marine Oceanic | Epipelagic (0-200m) | major | non-breeding |
| Marine Oceanic | Epipelagic (0-200m) | major | breeding |
| Marine Oceanic | Mesopelagic (200-1000m) | major | non-breeding |
| Marine Oceanic | Mesopelagic (200-1000m) | major | breeding |
| Shrubland | Temperate | major | breeding |
| Altitude | 400 - 700 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Biological resource use | Fishing & harvesting aquatic resources - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Very Rapid Declines | High Impact: 8 | ||||||
|
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| Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
| Past, Unlikely to Return | Minority (<50%) | Rapid Declines | Past Impact | ||||||
|
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| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Mus musculus | Timing | Scope | Severity | Impact | ||||
| Ongoing | Whole (>90%) | Rapid Declines | High Impact: 8 | ||||||
|
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| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Named species | Timing | Scope | Severity | Impact | ||||
| Past, Likely to Return | Minority (<50%) | Unknown | Past Impact | ||||||
|
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| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Sus domesticus | Timing | Scope | Severity | Impact | ||||
| Past, Unlikely to Return | Minority (<50%) | Rapid Declines | Past Impact | ||||||
|
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| Purpose | Scale |
|---|---|
| Food - human | subsistence, national |
Recommended citation
BirdLife International (2024) Species factsheet: Tristan Albatross Diomedea dabbenena. Downloaded from
https://datazone.birdlife.org/species/factsheet/tristan-albatross-diomedea-dabbenena on 24/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 24/11/2024.