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The Science Longline Fishing Campaign Report Ship Log & Webcast Last Year |
White-chinned PetrelWhite-chinned petrels are one of the most numerous, and commonly encountered species in the Southern Ocean.
They have a wingspan of 1.3 - 1.4 metres. Males weigh up to 1.4 kg, while females, slightly smaller, weigh up to 1.3 kg. Despite this considerable size, the White-chinned petrel is still smaller than any albatross species. They follow ships in considerable numbers (the M/V Arctic Sunrise has seen between a dozen and several hundred White-chinned petrels on most days of this expedition). The follow fishing vessels in even higher numbers (hundreds - thousands). Their ability to dive to depths of 10 metres or more makes them particularly adept at foraging around fishing vessels.
Birds forage up to 1, 650 km from their breeding colonies. Being smaller than the albatrosses and giant petrels - and therefore more agile - White-chinned petrels forage close in to fishing vessels, and try to grab food before their larger relations are on the scene. In an effort to lower albatross bycatch in the legal toothfish fishery,
CCAMLR has required night-time setting for most areas. This certainly
does help substantially reduce albatross catch, but petrels such as the
White- chinned actually feed at night and may suffer even higher levels
of hooking as a result. from 30 degrees south (although non-breeders may
reach much lower latitudes - in 1999, some followed the Arctic Sunrise
to within a day of Port Loius in Mauritius) to the sea-ice of the Antarctic
at 65 degrees south and beyond.
Breeding: They lay a single egg every year, between November and May. Breeding Colonies: the Falkland Islands, South Georgia and Gough Island in the South Atlantic Ocean; the Prince Edward, Crozet, Kerguelen groups in the South Indian Ocean; and on Campbell, Antipodes and the Auckland islands south of New Zealand. Small numbers may breed on other subantarctic islands. No reliable figure for their total population has been compiled. Status: Vulnerable The White-chinned petrel is circumpolar during the summer from 30 degrees
south to the sea-ice of the Antarctic at 65 degrees south and beyond.
Non-breeders may reach much lower latitudes. In 1999, some followed the
Arctic Sunrise to within a day of Port Loius in Mauritius. During the
winter, the birds will migrate up to the shelf waters of South America,
Australia/New Zealand, and southern Africa.
Sources: Graham Robertson & Rosemary Gales. 1998. Albatross Biology and Conservation. Surrey Beaty, Chipping Norton (NSW). Graham Pizzey & Frank Knight. 1998. Field Guide to the Birds of Australia. Angus and Robertson, Sydney. Derek Onley & Sandy Bartle. 1999. Identification of Seabirds of the Southern Ocean. Te Papa, Wellington.
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