Fluctuations in populations of Adélie penguins at Cape Bird, Antarctica
Abstract The results of a monitoring study of three Adelie penguin ( Pygoscelis adeliae ) rookeries at Cape Bird (77° 13'S, 166°28'E), Antarctica, are presented. Occupied nests were counted immediately after egg laying in most years between 1965 and 1970, and annually from 1974 to 1987. Th...
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Cambridge University Press (CUP)
1990
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Online Access: | http://dx.doi.org/10.1017/s0032247400011815 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400011815 |
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crcambridgeupr:10.1017/s0032247400011815 2024-03-03T08:36:13+00:00 Fluctuations in populations of Adélie penguins at Cape Bird, Antarctica Wilson, Kerry-Jayne 1990 http://dx.doi.org/10.1017/s0032247400011815 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400011815 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Polar Record volume 26, issue 159, page 305-308 ISSN 0032-2474 1475-3057 General Earth and Planetary Sciences Ecology Geography, Planning and Development journal-article 1990 crcambridgeupr https://doi.org/10.1017/s0032247400011815 2024-02-08T08:41:19Z Abstract The results of a monitoring study of three Adelie penguin ( Pygoscelis adeliae ) rookeries at Cape Bird (77° 13'S, 166°28'E), Antarctica, are presented. Occupied nests were counted immediately after egg laying in most years between 1965 and 1970, and annually from 1974 to 1987. The population has not shown the degree of stability that might be expected of a long-lived species with a low reproductive rate, twice deviating significantly from a mean value of about 37,500 pairs. In the censused rookeries numbers dropped by about 16% in 1967 and a further 30% in 1968. The 1968 decline was attributed to extensive fast ice, but numbers were unaffected in two subsequent years with similar ice conditions. After eight years of relative stability around the pre-1967 level, a period of rapid growth began in 1982 and 1983. The total of 54,000 pairs in 1987, the last year for which numbers are available, was the highest ever counted at Cape Bird. These results stress the need for caution when using bird populations to detect man-induced changes in the marine environment. Article in Journal/Newspaper Adelie penguin Antarc* Antarctica E. Antarctica Polar Record Pygoscelis adeliae Cambridge University Press Cape Bird ENVELOPE(-38.060,-38.060,-54.004,-54.004) Polar Record 26 159 305 308 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
General Earth and Planetary Sciences Ecology Geography, Planning and Development |
spellingShingle |
General Earth and Planetary Sciences Ecology Geography, Planning and Development Wilson, Kerry-Jayne Fluctuations in populations of Adélie penguins at Cape Bird, Antarctica |
topic_facet |
General Earth and Planetary Sciences Ecology Geography, Planning and Development |
description |
Abstract The results of a monitoring study of three Adelie penguin ( Pygoscelis adeliae ) rookeries at Cape Bird (77° 13'S, 166°28'E), Antarctica, are presented. Occupied nests were counted immediately after egg laying in most years between 1965 and 1970, and annually from 1974 to 1987. The population has not shown the degree of stability that might be expected of a long-lived species with a low reproductive rate, twice deviating significantly from a mean value of about 37,500 pairs. In the censused rookeries numbers dropped by about 16% in 1967 and a further 30% in 1968. The 1968 decline was attributed to extensive fast ice, but numbers were unaffected in two subsequent years with similar ice conditions. After eight years of relative stability around the pre-1967 level, a period of rapid growth began in 1982 and 1983. The total of 54,000 pairs in 1987, the last year for which numbers are available, was the highest ever counted at Cape Bird. These results stress the need for caution when using bird populations to detect man-induced changes in the marine environment. |
format |
Article in Journal/Newspaper |
author |
Wilson, Kerry-Jayne |
author_facet |
Wilson, Kerry-Jayne |
author_sort |
Wilson, Kerry-Jayne |
title |
Fluctuations in populations of Adélie penguins at Cape Bird, Antarctica |
title_short |
Fluctuations in populations of Adélie penguins at Cape Bird, Antarctica |
title_full |
Fluctuations in populations of Adélie penguins at Cape Bird, Antarctica |
title_fullStr |
Fluctuations in populations of Adélie penguins at Cape Bird, Antarctica |
title_full_unstemmed |
Fluctuations in populations of Adélie penguins at Cape Bird, Antarctica |
title_sort |
fluctuations in populations of adélie penguins at cape bird, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1990 |
url |
http://dx.doi.org/10.1017/s0032247400011815 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247400011815 |
long_lat |
ENVELOPE(-38.060,-38.060,-54.004,-54.004) |
geographic |
Cape Bird |
geographic_facet |
Cape Bird |
genre |
Adelie penguin Antarc* Antarctica E. Antarctica Polar Record Pygoscelis adeliae |
genre_facet |
Adelie penguin Antarc* Antarctica E. Antarctica Polar Record Pygoscelis adeliae |
op_source |
Polar Record volume 26, issue 159, page 305-308 ISSN 0032-2474 1475-3057 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0032247400011815 |
container_title |
Polar Record |
container_volume |
26 |
container_issue |
159 |
container_start_page |
305 |
op_container_end_page |
308 |
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1792496011906646016 |