Monday, March 30, 2020

Cook's petrel ( Pterodroma cookii ): historic distribution, breeding biology and effects of predators

TitleCook's petrel ( Pterodroma cookii ): historic distribution, breeding biology and effects of predators
Publication TypeJournal Article
Year of Publication2003
AuthorsImber, MJ, West, JA, Cooper, WJ
JournalNotornis
Volume50
Issue4
Pagination221-230
Type of Articlepaper
Keywordsbreeding biology, Codiish Island, Cook's petrel, Hauturu, historic distribution, Little Barrier Island, predators, Pterodroma cookii, Whenua Hou
Abstract

Cook's petrel (Pterodroma cookii), a New Zealand endemic, now breeds on only three islands at the extremities of its former range. Holocene fossil bones have indicated sites of 11 extinct colonies on North and South Islands, showing that Cook's petrels preferred hills Gallirallus australis) have endangered these last colonies. Breeding success, most affected by rat predation of eggs and chicks, deteriorated seriously after extermination of feral cats from Hauturu, but improved significantly after eradication of rats from Whenua Hou. Rats are now a major threat on Hauturu. Cook's petrels should be considered for reintroduction to suitable mainland reserves, to enhance biodiversity and restore nutrient inflows.

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