Translator Disclaimer
1 October 2005 SEXUAL DIMORPHISM OF POLAR BEARS
Author Affiliations +
Abstract

Sexual dimorphism in body mass, body length, head width, head length, and foreleg guard hair length of polar bears (Ursus maritimus) was examined from live-captured polar bears in Svalbard, Norway. Limited evidence of sexual dimorphism was apparent in cubs shortly after den emergence but was marked after the 1st year of life. Sexual dimorphism in adults resulted from both a higher growth rate and prolonged growth period in males. In mature animals, sexual dimorphism was greatest in mass, followed by foreleg guard hair length, head width, body length, and head length. Foreleg guard hair length was age related and hypothesized to be a form of ornamentation. Geographic variation in sexual dimorphism was evident for mass and body length for seven different populations but there was no evidence of a hyperallometric relationship in sexual dimorphism.

Andrew E. Derocher, Magnus Andersen, and Øystein Wiig "SEXUAL DIMORPHISM OF POLAR BEARS," Journal of Mammalogy 86(5), 895-901, (1 October 2005). https://doi.org/10.1644/1545-1542(2005)86[895:SDOPB]2.0.CO;2
Accepted: 3 February 2005; Published: 1 October 2005
JOURNAL ARTICLE
7 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top