MAPKs are differentially modulated in arctic ground squirrels during hibernation

2005 ◽  
Vol 80 (6) ◽  
pp. 862-868 ◽  
Author(s):  
Xiongwei Zhu ◽  
Mark A. Smith ◽  
George Perry ◽  
Yang Wang ◽  
Austin P. Ross ◽  
...  
Keyword(s):  
Ground Squirrels ◽  
Arctic Ground Squirrels

scholarly journals Habitat selection by arctic ground squirrels (Spermophilus parryii)

2010 ◽  
Vol 91 (5) ◽  
pp. 1251-1260 ◽  
Author(s):  
Oliver E. Barker ◽  
Andrew E. Derocher
Keyword(s):  
Habitat Selection ◽  
Ground Squirrels ◽  
Spermophilus Parryii ◽  
Arctic Ground Squirrels

scholarly journals Interrelationships Among Timing of Hibernation, Reproduction, and Warming Soil in Free-Living Female Arctic Ground Squirrels

2012 ◽  
pp. 63-72 ◽  
Author(s):  
Cory T. Williams ◽  
Michael J. Sheriff ◽  
Franziska Kohl ◽  
Brian M. Barnes ◽  
C. Loren Buck
Keyword(s):  
Ground Squirrels ◽  
Free Living ◽  
Arctic Ground Squirrels

Landscape-scale habitat associations of small mammals on the western coast of Hudson Bay

2021 ◽  
Author(s):  
Kevin Hawkshaw ◽  
Lee Foote ◽  
Alastair Franke
Keyword(s):  
Small Mammals ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Distance Sampling ◽  
Habitat Associations ◽  
Ground Squirrels ◽  
Suitable Habitat ◽  
Western Coast ◽  
Water Index ◽  
Arctic Ground Squirrels

Availability of suitable habitat affects the distribution and abundance of Arctic fauna, influencing how species respond to climate change and disturbance from resource extraction in the region. We surveyed Arctic ground squirrels (Urocitellus parryii Richardson, 1825) using distance sampling transects and concurrently counted microtine rodent burrows. Abundance of Arctic ground squirrels and microtine burrows was positively correlated with terrain ruggedness. Microtine burrows were more abundant inland and in areas with freshwater, while Arctic ground squirrels were more often found at low elevation without freshwater. Arctic ground squirrel abundance was positively related to the normalized difference water index, a proxy for vegetation water content, while microtine burrows were weakly correlated with the normalized difference vegetation index. Our study highlights the habitat associations of ecologically significant small mammals in an underrepresented Arctic study area.

scholarly journals Nitrogen recycling buffers against ammonia toxicity from skeletal muscle breakdown in hibernating arctic ground squirrels

2020 ◽  
Vol 2 (12) ◽  
pp. 1459-1471
Author(s):  
Sarah A. Rice ◽  
Gabriella A. M. Ten Have ◽  
Julie A. Reisz ◽  
Sarah Gehrke ◽  
Davide Stefanoni ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Ground Squirrels ◽  
Ammonia Toxicity ◽  
Nitrogen Recycling ◽  
Muscle Breakdown ◽  
Arctic Ground Squirrels

Modulation of gene expression in hibernating arctic ground squirrels

2008 ◽  
Vol 32 (2) ◽  
pp. 170-181 ◽  
Author(s):  
Jun Yan ◽  
Brian M. Barnes ◽  
Franziska Kohl ◽  
Thomas G. Marr
Keyword(s):  
Gene Expression ◽  
Circadian Rhythm ◽  
Cell Growth ◽  
Acid Metabolism ◽  
Molecular Transport ◽  
Ground Squirrels ◽  
Mrna Levels ◽  
Brown Adipose ◽  
Modulation Of Gene Expression ◽  
Arctic Ground Squirrels

We performed a broadscale screening of differential gene expression using both high-throughput bead-array technology and real-time PCR assay in brown adipose tissue, liver, heart, hypothalamus, and skeletal muscle in hibernating arctic ground squirrels, comparing animals sampled after two durations of steady-state torpor, during two stages of spontaneous arousal episodes, and in animals after they ended hibernation. Significant seasonal and torpor-arousal cycle differences of gene expression were detected in genes involved in glycolysis, fatty acid metabolism, gluconeogenesis, amino acid metabolism, molecular transport, detoxification, cardiac contractility, circadian rhythm, cell growth and apoptosis, muscle dystrophy, and RNA and protein protection. We observed, for the first time, complex modulation of gene expression during multiple stages of torpor-arousal cycles. The mRNA levels of certain metabolic genes drop significantly during the transition from late torpor to early arousal, perhaps due to the rapid turnover of mRNA transcripts resulting from the translational demands during thermogenesis in early arousal, whereas the mRNA levels of genes related to circadian rhythm, cell growth, and apoptosis rise significantly in the early or late arousal phases during torpor-arousal cycle, suggesting the resumption of circadian rhythm and cell cycle during arousal.

Sign in / Sign up

Export Citation Format

Share Document