Population-Size and Breeding Success of the Gentoo Penguin, Pygoscelis-Papua, at Macquarie Island

Abstract

During November 1984 there were 4700 breeding pairs of gentoo penguins in 53 colonies at Macquarie I. Seventy-four percent of pairs bred on the west coast of the island. Breeding success of colonies ranged from 0 to 1.52 chicks per pair, with breeding success of the total population averaging 0.98 chicks per pair. Breeding success increased with colony size.