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Record #174528:

Sexual dimorphism of polar bears / Andrew E. Derocher, Magnus Andersen, Øystein Wiig.

Title: Sexual dimorphism of polar bears / Andrew E. Derocher, Magnus Andersen, Øystein Wiig.
Author(s): Derocher, Andrew E.
Andersen, Magnus.
Wiig, Øystein.
Date: 2005.
In: Journal of Mammalogy. (2005.), Vol. 86(5) (2005)
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 first year of life. Sexual dimorphism in adults resulted from 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 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 hyperallometric relationship in sexual dimorphism.
Notes:

Journal of Mammalogy. Vol. 86(5) :895-901 (2005).

Keywords: 591.1 -- Animal physiology.
591.4 -- Animal anatomy.
591.134 -- Animal growth.
591.134.5 -- Animals, size and body weight.
591.15 -- Genetic variation.
599.742.2 -- Ursidae: Ursus maritimus.
H6 -- Zoology: mammals.
(*3) -- Arctic regions.
(*32) -- Svalbard.
SPRI record no.: 174528

MARCXML

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245 10 ‡aSexual dimorphism of polar bears /‡cAndrew E. Derocher, Magnus Andersen, Øystein Wiig.
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500 ## ‡aJournal of Mammalogy. Vol. 86(5) :895-901 (2005).
520 3# ‡aSexual 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 first year of life. Sexual dimorphism in adults resulted from 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 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 hyperallometric relationship in sexual dimorphism.
650 07 ‡a591.1 -- Animal physiology.‡2udc
650 07 ‡a591.4 -- Animal anatomy.‡2udc
650 07 ‡a591.134 -- Animal growth.‡2udc
650 07 ‡a591.134.5 -- Animals, size and body weight.‡2udc
650 07 ‡a591.15 -- Genetic variation.‡2udc
650 07 ‡a599.742.2 -- Ursidae: Ursus maritimus.‡2udc
650 07 ‡aH6 -- Zoology: mammals.‡2local
651 #7 ‡a(*3) -- Arctic regions.‡2udc
651 #7 ‡a(*32) -- Svalbard.‡2udc
700 1# ‡aAndersen, Magnus.
700 1# ‡aWiig, Øystein.
773 0# ‡7nnas ‡tJournal of Mammalogy. ‡gVol. 86(5) (2005) ‡wSPRI-22378
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917 ## ‡aUnenhanced record from Muscat, imported 2019
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