The current trajectory of king penguin (Aptenodytes patagonicus) chick numbers on Macquarie Island in relation to environmental conditions

Penelope Pascoe; Ben Raymond; Noel CarmichaelJulie McInnes

首页> 外文期刊>ICES journal of marine science: International Council for the Exploration of the Sea journal of marine science >The current trajectory of king penguin (Aptenodytes patagonicus) chick numbers on Macquarie Island in relation to environmental conditions

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The current trajectory of king penguin (Aptenodytes patagonicus) chick numbers on Macquarie Island in relation to environmental conditions

机译：The current trajectory of king penguin (Aptenodytes patagonicus) chick numbers on Macquarie Island in relation to environmental conditions

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Macquarie Island’s king penguin (Aptenodytes patagonicus) population has changed dramatically over recent centuries. Following near decimation from commercial exploitation during the 19th and early 20th centuries, chick numbers increased rapidly from 1930–1980. Since then, the population’s trajectory has remained unreported, and environmental factors potentially influencing the population are poorly understood. From 2007–2020, king penguin chicks were censused annually. Chick numbers fluctuated between years, ranging from 33,513–78,714. Overall, the numbers decreased at 1.06 ± 0.03% per annum. While further studies are required to infer causality, annual chick numbers were negatively correlated with environmental conditions on land and at sea. Heavy rainfall, total rainfall, and maximum east coast wave height during incubation correlated with fewer chicks that year. Warmer sea surface temperatures in the foraging region of adult king penguins during incubation and early chick-rearing also correlated with lower chick numbers. While interannual variability and the long generation time of king penguins makes it unclear if the decrease in chick numbers represent a decrease in the breeding population, it is clear the late 20th century rapid increase in Macquarie Island’s breeding population has ceased. Ongoing monitoring will establish if this is indicative of the population stabilising or an ongoing population decline.

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《ICES journal of marine science: International Council for the Exploration of the Sea journal of marine science》 |2022年第7期|2084-2092|共9页
作者
Penelope Pascoe; Ben Raymond; Noel CarmichaelJulie McInnes;
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Institute for Marine and Antarctic Studies, University of Tasmania, 20 Castray Esplanade, Battery Point TAS 7004, Australia;

Institute for Marine and Antarctic Studies, University of Tasmania, 20 Castray Esplanade, Battery Point TAS 7004, Australia,Department of Agriculture,Water and the Environment Australian Antarctic Division, Kingston, TAS 7050, Australia;

Department of Primary Industries, Parks,Water and Environment Tasmania Parks and Wildlife Service, Hobart, TAS 7001, Australia;

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正文语种英语
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population-estimates; rainfall; seabirds; sea surface temperature; Southern Ocean;

The current trajectory of king penguin (Aptenodytes patagonicus) chick numbers on Macquarie Island in relation to environmental conditions

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