Acta Zoologica Cracoviensia, 30() 1987
Diurnal pattern of changes in the number of penguins on land and the estimation of their abundance (Admiralty Bay, King George I., South Shetland Islands)
Abstract:
The most suitable hours for estimating the abundance of penguins in particular phenological periods were determined on the basis of diurnal changes in their numbers. In spite of differences in diurnal behaviour between Pygoscelis papua, P. adeliae and P. antarctica the most suitable time of counting falls between 17.00 and 21.00 of local time in the breeding season and 1 to 1.5 hours before nightfall after breeding. In the incubation period breeding partners of P. papua and P. antarctica change over at nests usually every 1-3 days. Similar breaks in their stay on land were observed in the post-breeding period.
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