The little auk Alle alle polaris of Franz Josef Land: a comparison with Svalbard Alle a. alle populations
Breeding biology, nestling growth and development, and biometry of the little auk Alle alle polaris were studied in Franz Josef Land. A total of 103 adult birds were measured, 60 in the field and 43 in the St. Petersburg Museum. The development of 16 chicks was compared with that of Alle a. alle chi...
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Language: | English |
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Norwegian Polar Institute
1996
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Online Access: | https://polarresearch.net/index.php/polar/article/view/1915 https://doi.org/10.3402/polar.v15i1.6632 |
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ftjpolarres:oai:journals.openacademia.net:article/1915 2023-05-15T13:16:13+02:00 The little auk Alle alle polaris of Franz Josef Land: a comparison with Svalbard Alle a. alle populations Stempniewicz, L. Skakuj, M. Iliszko, L. 1996-01-06 application/pdf https://polarresearch.net/index.php/polar/article/view/1915 https://doi.org/10.3402/polar.v15i1.6632 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/1915/5164 https://polarresearch.net/index.php/polar/article/view/1915 doi:10.3402/polar.v15i1.6632 Copyright (c) 2018 Polar Research Polar Research; Vol. 15 No. 1 (1996); 1-10 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1996 ftjpolarres https://doi.org/10.3402/polar.v15i1.6632 2021-11-11T19:11:42Z Breeding biology, nestling growth and development, and biometry of the little auk Alle alle polaris were studied in Franz Josef Land. A total of 103 adult birds were measured, 60 in the field and 43 in the St. Petersburg Museum. The development of 16 chicks was compared with that of Alle a. alle chicks from Spitsbergen. At particular stages of development, both adults and nestlings of A. a. polaris are larger than those of A. a. alle. In Franz Josef Land the breeding season is more extended and less synchronised than that of Svalbard. The majority of the little auks in the studied colonies in Franz Josef Land nested on steep rocky cliffs, possibly as an adaptation to the severe climatic conditions and heavy mammalian predation in subcolonies located on accessible mountain slopes. Glaucous gulls Larus hyperboreus exerted negligible predatory pressure. This study confirms the existence of morphologically distinguishable populations of the little auk on Franz Josef Land and Svalbard, supported by recent studies of climatic and oceanographic conditions in the two areas that parallel the morphological differentiation. Article in Journal/Newspaper Alle alle Franz Josef Land Larus hyperboreus little auk Polar Research Svalbard Spitsbergen Polar Research (E-Journal) Franz Josef Land ENVELOPE(55.000,55.000,81.000,81.000) Svalbard Polar Research 15 1 1 10 |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
description |
Breeding biology, nestling growth and development, and biometry of the little auk Alle alle polaris were studied in Franz Josef Land. A total of 103 adult birds were measured, 60 in the field and 43 in the St. Petersburg Museum. The development of 16 chicks was compared with that of Alle a. alle chicks from Spitsbergen. At particular stages of development, both adults and nestlings of A. a. polaris are larger than those of A. a. alle. In Franz Josef Land the breeding season is more extended and less synchronised than that of Svalbard. The majority of the little auks in the studied colonies in Franz Josef Land nested on steep rocky cliffs, possibly as an adaptation to the severe climatic conditions and heavy mammalian predation in subcolonies located on accessible mountain slopes. Glaucous gulls Larus hyperboreus exerted negligible predatory pressure. This study confirms the existence of morphologically distinguishable populations of the little auk on Franz Josef Land and Svalbard, supported by recent studies of climatic and oceanographic conditions in the two areas that parallel the morphological differentiation. |
format |
Article in Journal/Newspaper |
author |
Stempniewicz, L. Skakuj, M. Iliszko, L. |
spellingShingle |
Stempniewicz, L. Skakuj, M. Iliszko, L. The little auk Alle alle polaris of Franz Josef Land: a comparison with Svalbard Alle a. alle populations |
author_facet |
Stempniewicz, L. Skakuj, M. Iliszko, L. |
author_sort |
Stempniewicz, L. |
title |
The little auk Alle alle polaris of Franz Josef Land: a comparison with Svalbard Alle a. alle populations |
title_short |
The little auk Alle alle polaris of Franz Josef Land: a comparison with Svalbard Alle a. alle populations |
title_full |
The little auk Alle alle polaris of Franz Josef Land: a comparison with Svalbard Alle a. alle populations |
title_fullStr |
The little auk Alle alle polaris of Franz Josef Land: a comparison with Svalbard Alle a. alle populations |
title_full_unstemmed |
The little auk Alle alle polaris of Franz Josef Land: a comparison with Svalbard Alle a. alle populations |
title_sort |
little auk alle alle polaris of franz josef land: a comparison with svalbard alle a. alle populations |
publisher |
Norwegian Polar Institute |
publishDate |
1996 |
url |
https://polarresearch.net/index.php/polar/article/view/1915 https://doi.org/10.3402/polar.v15i1.6632 |
long_lat |
ENVELOPE(55.000,55.000,81.000,81.000) |
geographic |
Franz Josef Land Svalbard |
geographic_facet |
Franz Josef Land Svalbard |
genre |
Alle alle Franz Josef Land Larus hyperboreus little auk Polar Research Svalbard Spitsbergen |
genre_facet |
Alle alle Franz Josef Land Larus hyperboreus little auk Polar Research Svalbard Spitsbergen |
op_source |
Polar Research; Vol. 15 No. 1 (1996); 1-10 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/1915/5164 https://polarresearch.net/index.php/polar/article/view/1915 doi:10.3402/polar.v15i1.6632 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v15i1.6632 |
container_title |
Polar Research |
container_volume |
15 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
10 |
_version_ |
1766273039145631744 |