Differences in growth, size and sexual dimorphism in skulls of East Greenland and Svalbard polar bears (Ursus maritimus)
Size, growth and sexual dimorphism of nine skull traits was studied in 300 East Greenland and 391 Svalbard polar bears (Ursus maritimus). Two traits were significantly larger in bears from East Greenland compared to Svalbard bears, and trait size was smaller after 1960 in five traits. For both local...
Published in: | Polar Biology |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/f851159d-3457-4194-8fe1-969e6a591f77 2023-05-15T16:03:10+02:00 Differences in growth, size and sexual dimorphism in skulls of East Greenland and Svalbard polar bears (Ursus maritimus) Bechshøft, Thea Sonne, Christian Rigét, Frank F. Wiig, Øystein Dietz, Rune 2008-07-01 https://pure.au.dk/portal/da/publications/differences-in-growth-size-and-sexual-dimorphism-in-skulls-of-east-greenland-and-svalbard-polar-bears-ursus-maritimus(f851159d-3457-4194-8fe1-969e6a591f77).html https://doi.org/10.1007/s00300-008-0435-y http://www.scopus.com/inward/record.url?scp=44949247241&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Bechshøft , T , Sonne , C , Rigét , F F , Wiig , Ø & Dietz , R 2008 , ' Differences in growth, size and sexual dimorphism in skulls of East Greenland and Svalbard polar bears (Ursus maritimus) ' , Polar Biology , vol. 31 , no. 8 , pp. 945-958 . https://doi.org/10.1007/s00300-008-0435-y East Greenland Growth Polar bear Sexual dimorphism Size Skull Svalbard Ursus maritimus article 2008 ftuniaarhuspubl https://doi.org/10.1007/s00300-008-0435-y 2020-11-11T23:44:27Z Size, growth and sexual dimorphism of nine skull traits was studied in 300 East Greenland and 391 Svalbard polar bears (Ursus maritimus). Two traits were significantly larger in bears from East Greenland compared to Svalbard bears, and trait size was smaller after 1960 in five traits. For both localities and both age groups (subadult, adult), mean trait size values were higher in males than females (all: P < 0.05). Gompertz growth models showed trait size increasing with age in seven traits. Depending on the trait, males reached 95% asymptotic trait size at age 3-10, females at age 2-6. The females of both localities matured at approximately the same age, whereas the Svalbard males generally matured years later than their East Greenland peers. The differences found in the present study between the two polar bear subpopulations support the notion that East Greenland and Svalbard polar bears probably should be managed as separate units. Article in Journal/Newspaper East Greenland Greenland Polar Biology Svalbard Ursus maritimus Aarhus University: Research Greenland Svalbard Polar Biology 31 8 945 958 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
East Greenland Growth Polar bear Sexual dimorphism Size Skull Svalbard Ursus maritimus |
spellingShingle |
East Greenland Growth Polar bear Sexual dimorphism Size Skull Svalbard Ursus maritimus Bechshøft, Thea Sonne, Christian Rigét, Frank F. Wiig, Øystein Dietz, Rune Differences in growth, size and sexual dimorphism in skulls of East Greenland and Svalbard polar bears (Ursus maritimus) |
topic_facet |
East Greenland Growth Polar bear Sexual dimorphism Size Skull Svalbard Ursus maritimus |
description |
Size, growth and sexual dimorphism of nine skull traits was studied in 300 East Greenland and 391 Svalbard polar bears (Ursus maritimus). Two traits were significantly larger in bears from East Greenland compared to Svalbard bears, and trait size was smaller after 1960 in five traits. For both localities and both age groups (subadult, adult), mean trait size values were higher in males than females (all: P < 0.05). Gompertz growth models showed trait size increasing with age in seven traits. Depending on the trait, males reached 95% asymptotic trait size at age 3-10, females at age 2-6. The females of both localities matured at approximately the same age, whereas the Svalbard males generally matured years later than their East Greenland peers. The differences found in the present study between the two polar bear subpopulations support the notion that East Greenland and Svalbard polar bears probably should be managed as separate units. |
format |
Article in Journal/Newspaper |
author |
Bechshøft, Thea Sonne, Christian Rigét, Frank F. Wiig, Øystein Dietz, Rune |
author_facet |
Bechshøft, Thea Sonne, Christian Rigét, Frank F. Wiig, Øystein Dietz, Rune |
author_sort |
Bechshøft, Thea |
title |
Differences in growth, size and sexual dimorphism in skulls of East Greenland and Svalbard polar bears (Ursus maritimus) |
title_short |
Differences in growth, size and sexual dimorphism in skulls of East Greenland and Svalbard polar bears (Ursus maritimus) |
title_full |
Differences in growth, size and sexual dimorphism in skulls of East Greenland and Svalbard polar bears (Ursus maritimus) |
title_fullStr |
Differences in growth, size and sexual dimorphism in skulls of East Greenland and Svalbard polar bears (Ursus maritimus) |
title_full_unstemmed |
Differences in growth, size and sexual dimorphism in skulls of East Greenland and Svalbard polar bears (Ursus maritimus) |
title_sort |
differences in growth, size and sexual dimorphism in skulls of east greenland and svalbard polar bears (ursus maritimus) |
publishDate |
2008 |
url |
https://pure.au.dk/portal/da/publications/differences-in-growth-size-and-sexual-dimorphism-in-skulls-of-east-greenland-and-svalbard-polar-bears-ursus-maritimus(f851159d-3457-4194-8fe1-969e6a591f77).html https://doi.org/10.1007/s00300-008-0435-y http://www.scopus.com/inward/record.url?scp=44949247241&partnerID=8YFLogxK |
geographic |
Greenland Svalbard |
geographic_facet |
Greenland Svalbard |
genre |
East Greenland Greenland Polar Biology Svalbard Ursus maritimus |
genre_facet |
East Greenland Greenland Polar Biology Svalbard Ursus maritimus |
op_source |
Bechshøft , T , Sonne , C , Rigét , F F , Wiig , Ø & Dietz , R 2008 , ' Differences in growth, size and sexual dimorphism in skulls of East Greenland and Svalbard polar bears (Ursus maritimus) ' , Polar Biology , vol. 31 , no. 8 , pp. 945-958 . https://doi.org/10.1007/s00300-008-0435-y |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00300-008-0435-y |
container_title |
Polar Biology |
container_volume |
31 |
container_issue |
8 |
container_start_page |
945 |
op_container_end_page |
958 |
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1766398799247310848 |