Inter‐colony foraging area segregation quantified in small colonies of Adélie Penguins
Theoretical models on the movement of colonial animals predict that neighbouring colonies may segregate their foraging areas, and many seabird studies have reported the presence of such segregations. However, these studies have often lacked the appropriate null model to test the effect of neighbouri...
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crwiley:10.1111/ibi.12837 2024-09-15T17:44:56+00:00 Inter‐colony foraging area segregation quantified in small colonies of Adélie Penguins Ito, Kentaro Watanabe, Yuuki Y. Kokubun, Nobuo Takahashi, Akinori Japan Society for the Promotion of Science 2020 http://dx.doi.org/10.1111/ibi.12837 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fibi.12837 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ibi.12837 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ibi.12837 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111%2Fibi.12837 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ibis volume 163, issue 1, page 90-98 ISSN 0019-1019 1474-919X journal-article 2020 crwiley https://doi.org/10.1111/ibi.12837 2024-07-11T04:38:49Z Theoretical models on the movement of colonial animals predict that neighbouring colonies may segregate their foraging areas, and many seabird studies have reported the presence of such segregations. However, these studies have often lacked the appropriate null model to test the effect of neighbouring colonies on foraging areas, especially in small colonies or in short‐ranging species. Here, we examined the foraging areas of Adélie Penguins Pygoscelis adeliae from two neighbouring (2 km apart) colonies by using bird‐borne GPS loggers. The field study was conducted at Hukuro Cove colony (104 pairs) and Mizukuguri Cove colony (338 pairs) in Lützow‐Holm Bay, East Antarctica. We obtained GPS tracks for 504 foraging trips from 48 chick‐rearing Adélie Penguins and quantified the degree of overlap in the foraging areas between two colonies. We also produced simulated movement tracks by using correlated random‐walks assuming no inter‐colony competition and quantified the degree of overlap in the simulated foraging areas. Finally, we compared the results from real GPS tracks with those from simulated tracks to examine the effect of neighbouring colonies on Adélie Penguin movement. The results indicate that the degree of overlap was significantly smaller in real tracks than in simulated tracks. In real tracks, the foraging area of the smaller Hukuro Cove colony extended to the other side of the larger Mizukuguri Cove colony, unlike in simulated tracks. Consequently, we suggest that Adélie Penguins from two neighbouring colonies segregated their foraging areas and that the larger colony appeared to affect the foraging area of the smaller colony. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Pygoscelis adeliae Wiley Online Library Ibis 163 1 90 98 |
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English |
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Theoretical models on the movement of colonial animals predict that neighbouring colonies may segregate their foraging areas, and many seabird studies have reported the presence of such segregations. However, these studies have often lacked the appropriate null model to test the effect of neighbouring colonies on foraging areas, especially in small colonies or in short‐ranging species. Here, we examined the foraging areas of Adélie Penguins Pygoscelis adeliae from two neighbouring (2 km apart) colonies by using bird‐borne GPS loggers. The field study was conducted at Hukuro Cove colony (104 pairs) and Mizukuguri Cove colony (338 pairs) in Lützow‐Holm Bay, East Antarctica. We obtained GPS tracks for 504 foraging trips from 48 chick‐rearing Adélie Penguins and quantified the degree of overlap in the foraging areas between two colonies. We also produced simulated movement tracks by using correlated random‐walks assuming no inter‐colony competition and quantified the degree of overlap in the simulated foraging areas. Finally, we compared the results from real GPS tracks with those from simulated tracks to examine the effect of neighbouring colonies on Adélie Penguin movement. The results indicate that the degree of overlap was significantly smaller in real tracks than in simulated tracks. In real tracks, the foraging area of the smaller Hukuro Cove colony extended to the other side of the larger Mizukuguri Cove colony, unlike in simulated tracks. Consequently, we suggest that Adélie Penguins from two neighbouring colonies segregated their foraging areas and that the larger colony appeared to affect the foraging area of the smaller colony. |
author2 |
Japan Society for the Promotion of Science |
format |
Article in Journal/Newspaper |
author |
Ito, Kentaro Watanabe, Yuuki Y. Kokubun, Nobuo Takahashi, Akinori |
spellingShingle |
Ito, Kentaro Watanabe, Yuuki Y. Kokubun, Nobuo Takahashi, Akinori Inter‐colony foraging area segregation quantified in small colonies of Adélie Penguins |
author_facet |
Ito, Kentaro Watanabe, Yuuki Y. Kokubun, Nobuo Takahashi, Akinori |
author_sort |
Ito, Kentaro |
title |
Inter‐colony foraging area segregation quantified in small colonies of Adélie Penguins |
title_short |
Inter‐colony foraging area segregation quantified in small colonies of Adélie Penguins |
title_full |
Inter‐colony foraging area segregation quantified in small colonies of Adélie Penguins |
title_fullStr |
Inter‐colony foraging area segregation quantified in small colonies of Adélie Penguins |
title_full_unstemmed |
Inter‐colony foraging area segregation quantified in small colonies of Adélie Penguins |
title_sort |
inter‐colony foraging area segregation quantified in small colonies of adélie penguins |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/ibi.12837 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fibi.12837 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ibi.12837 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ibi.12837 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111%2Fibi.12837 |
genre |
Antarc* Antarctica East Antarctica Pygoscelis adeliae |
genre_facet |
Antarc* Antarctica East Antarctica Pygoscelis adeliae |
op_source |
Ibis volume 163, issue 1, page 90-98 ISSN 0019-1019 1474-919X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/ibi.12837 |
container_title |
Ibis |
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163 |
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1 |
container_start_page |
90 |
op_container_end_page |
98 |
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1810492613355110400 |