Polar bears experience skeletal muscle atrophy in response to food deprivation and reduced activity in winter and summer | Zendy

John P. Whiteman | Zendy; Henry J. Harlow | Zendy; George M. Durner | Zendy; Eric V. Regehr | Zendy; Bryan C. Rourke | Zendy; Manuel Robles | Zendy; Steven C. Amstrup | Zendy; Merav BenDavid | Zendy

Open Access

Polar bears experience skeletal muscle atrophy in response to food deprivation and reduced activity in winter and summer

Author(s) -

John P. Whiteman,

Henry J. Harlow,

George M. Durner,

Eric V. Regehr,

Bryan C. Rourke,

Manuel Robles,

Steven C. Amstrup,

Merav BenDavid

Publication year - 2017

Publication title -

conservation physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.942

H-Index - 37

ISSN - 2051-1434

DOI - 10.1093/conphys/cox049

Subject(s) - biology , predation , ursus maritimus , muscle atrophy , atrophy , skeletal muscle , ecology , arctic , endocrinology , genetics

Polar bears experience skeletal muscle atrophy during winter whether they hibernate or not. Bears spending summer on sea ice in the Arctic basin undergo a second period of atrophy caused by fasting, whereas bears with shore access to adequate, alternative food do not. Summer atrophy may influence fitness.

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