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THE mystery of exactly where albatrosses go when they wander across the ocean
in between breeding seasons has been solved.

Far from aimlessly meandering on the Southern Ocean, 鈥渨andering albatrosses鈥�
(Diomedea exulans) leave their breeding and foraging grounds and head to
specific patches of sea where they spend the rest of the year, French and German
researchers say.

Henri Weimerskirch of the National Centre for Scientific Research in
Beauvoir-sur-Niort and Rory Wilson of the Oceanography Institute at the
University of Kiel tracked nine birds using a new geolocation technique. Each
bird carried a small light-intensity gauge fitted with an internal clock, which
told the researchers when the birds were experiencing dawn and dusk. Combined
with the date, this allowed them to calculate the birds鈥� longitude and
latitude.

The albatrosses were initially tagged on the Crozet Islands in the Indian
Ocean. After leaving, the birds flew up to 8500 kilometres to specific ocean
sectors in waters ranging from tropical to Antarctic. Each bird stayed at one
location. Birds probably return to the same spot throughout their lives, say the
researchers.

Knowing where albatrosses go could stop thousands being drowned each year by
long fishing lines. Plans to stop these deaths rely on working out the overlap
between areas used by the birds and fisheries.