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 | Northern Giant Petrel (Macronectes halli). |
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Regional Nesting Sites of the Northern Giant Petrel (Macronectes halli).
References. Green dots: colonies and the percentage of the world population that each area represents. Blue text: populations for which the Atlas provides distribution data. Red text: populations for which there are no data. Blue circle: colonies of origin of individuals studied.
| © Valeria Falabella |
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Nesting sites |
 Spring (S. Georgia) |
During incubation Northern Giant Petrel adults from South Georgia foraged as far west as the area covered by this Atlas. Particularly significant are the areas of the Burdwood Bank, Staten Island, southern Chile and areas of the slope opposite Río de la Plata.
Data (satellite instruments) on 1 adult male and 4 adult females from South Georgia. Period: October-November.
Dataholders: J. Croxall, P. Trathan, R. Phillips and J. González-Solís.
|  Spring (S. Georgia) |
In spring, at the beginning of the breeding season, Northern Giant Petrel adults forage in polar and sub-Antarctic waters south of parallel 45ºS, as well as to the east of the Malvinas Islands.
Data (obtained with geolocators) on 18 adults of both sexes from South Georgia. Period: Spring.
Dataholders: J. Croxall, P. Trathan, R. Phillips and J. González-Solís.
 Summer (S. Georgia) |
In summer, principal foraging areas for adults of Northern Giant Petrel are still concentrated in polar and sub-Antarctic waters south of parallel 45ºS.
Data (obtained with geolocators) on 18 adults of both sexes from South Georgia. Period: Summer.
Dataholders: J. Croxall, P. Trathan, R. Phillips and J. González-Solís.
|  Autumn (S. Georgia) |
At the end of the breeding season, Northern Giant Petrel adults from South Georgia distribute widely, particularly along the entire slope and in the deep waters of the Argentine Basin between latitudes 55º and 45ºS.
Data (obtained with geolocators) on 24 adults of both sexes from South Georgia. Period: Autumn.
Dataholders: J. Croxall, P. Trathan, R. Phillips and J. González-Solís.
 Winter (S. Georgia) |
In winter, the distribution of the Northern Giant Petrel adults from South Georgia extends to the North of the Patagonian Sea, with particular use of coastal waters to the south of the province of Buenos Aires.
Data (obtained with geolocators) on 24 adults of both sexes from South Georgia. Period: Winter.
Dataholders: J. Croxall, P. Trathan, R. Phillips and J. González-Solís.
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Northern Giant Petrel
Macronectes halli
Regional Nesting Sites: Sub-Antarctic islands, specifically South Georgia, Prince Edward, Crozet, Kerguelen and Macquarie Island; and also at Auckland, Campbell, Antipodes and Chatham Island (New Zealand). Diet: Females feed principally on live prey from the ocean (crustaceans, cephalopods and fish), whereas males are scavengers (remains of marine mammals and penguins). They follow fishing fleets to feed on discards and commonly try to eat the bait on fishing lines. World breeding population: Estimated at 11,500 pairs. Conservation Status: Near threatened (IUCN, 2008). Main threats: Incidental mortality in longline fisheries.
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