Regional Nesting Sites of the Black-browed Albatross (Thalassarche melanophrys).

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.

The Chilean fjords are used principally by Black-browed Albatrosses from the colonies of southern Chile. Individuals from the Malvinas Islands make intense use of the southern slope and areas of shelf opposite the Valdes Peninsula. Albatrosses from South Georgia feed in waters of the Argentine Basin as far inshore as the continental slope.

Data of individuals from 7 colonies on islands of southern Chile, Malvinas Islands and South Georgia. All available data (400 trips), between January and December, without distinguishing between seasons.

Dataholders: G. Robertson, J. Arata and C. Moreno (Chile: Islas Ildefonso, Islas Diego Ramírez and Diego de Almagro); N. Huin and J. Croxall (Malvinas: Beauchêane, Saunders and Steeple Jason Islands); J. Croxall, P. Trathan and R. Phillips (South Georgia).

During incubation (spring), adults of Black-browed Albatross make longer trips and explore waters for food far from the colony. In summer (chick-rearing season) adults must forage in waters closer to the colony, making shorter trips.

Data on adults of both sexes from the colonies on the Malvinas Islands: Beauchêne (11 trips in spring and 49 in summer) and Saunders islands (22 trips in spring and 118 in summer). Period: October-March (breeding season).

Dataholders: N. Huin and J. Croxall.

Most feeding trips of Black-browed Albatrosses to the Patagonian Sea take place during incubation (spring). In summer, while raising chicks, breeding adults forage in waters closer to South Georgia, and only a few individuals travel as far as the Patagonian Sea.

Data on adult males and females from South Georgia (16 trips in spring and 37 in summer). Period: October-March (breeding season).

Dataholders: J. Croxall, P. Trathan and R. Phillips.

Adults of Black-browed Albatross that breed on the Malvinas Islands principally use the continental shelf and slope of the Patagonian Sea, travelling mainly to the north of the islands. In general they go no further north than 40ºS.

Data on 8 adults of both sexes from the Steeple Jason colony (Malvinas Islands). Period: November.

Dataholders: N. Huin and J. Croxall.

Juveniles of Black-browed Albatross from the Malvinas Islands are more widely dispersed and feed further north than adults. The main areas used are the continental shelf and the slope north of 40ºS.

Data on 3 juveniles from the Steeple Jason colony (Malvinas Islands). Period: April-August.

Dataholders: N. Huin and J. Croxall.

Once breeding season is over, adults of Black-browed Albatross from the Malvinas Islands explore feeding grounds distant from the colony. They are found widely distributed on the continental shelf of the Patagonian Sea.

Data (recorded with geolocators) deployed on 30 adults of both sexes from the Malvinas Islands. Period: July-September.

Dataholders: N. Huin and J. Croxall.

Adults of Black-browed Albatross from the islands in the south of Chile mostly use the waters of the Chilean fjords, in the South Pacific, and the area round Staten Island.

Data on adults from the 3 colonies of southern Chile: Diego de Almagro Island (2 trips), Ildefonso Islands (26 trips) and Diego Ramírez Islands (88 trips). Period: October-December (breeding season).

Dataholders: G. Robertson, J. Arata and C. Moreno.