Richardson’s ground squirrel (Urocitellus richardsonii) alarm call receivers experience an auditory continuity illusion.

2020 ◽  
Vol 74 (3) ◽  
pp. 193-200
Author(s):  
Daniel T. Enright ◽  
Launa C. Leboe-McGowan ◽  
James F. Hare
Keyword(s):  
Ground Squirrel ◽  
Alarm Call ◽  
Urocitellus Richardsonii

scholarly journals A case of rapid recurrence of apocrine ductal carcinoma originating from the oral scent gland of a Richardson’s ground squirrel (Urocitellus richardsonii)

2018 ◽  
Vol 31 (3) ◽  
pp. 189-193 ◽  
Author(s):  
Ayumi Eguchi ◽  
Mari Inohana ◽  
Misato Nakamura ◽  
Rei Nagahara ◽  
Megu Itahashi ◽  
...  
Keyword(s):  
Ground Squirrel ◽  
Ductal Carcinoma ◽  
Scent Gland ◽  
Urocitellus Richardsonii

Ancient DNA reveals northwest range extension of Richardson’s ground squirrel (Urocitellus richardsonii) into northeastern British Columbia, Canada, during the Late Pleistocene

2020 ◽  
Vol 57 (7) ◽  
pp. 855-866
Author(s):  
Thomas C.A. Royle ◽  
Dongya Y. Yang ◽  
Jonathan C. Driver
Keyword(s):  
British Columbia ◽  
Ancient Dna ◽  
Ground Squirrel ◽  
Mitochondrial Control Region ◽  
Archaeological Site ◽  
Ground Squirrels ◽  
Vegetation Communities ◽  
Peace River ◽  
River Region ◽  
Urocitellus Richardsonii

Ancient DNA was extracted from 12 500 to 10 500 year old ground squirrel bones from Tse’K’wa, an archaeological site in the Peace River region of northeastern British Columbia, Canada. Analysis of mitochondrial DNA from seven individuals demonstrates that all are Urocitellus richardsonii (Richardson’s ground squirrel), a species not found in the region today. Phylogenetic and sequence analyses indicate these individuals share a previously undocumented mitochondrial control region haplotype that is most closely related to haplotypes observed in modern specimens from Saskatchewan and Montana. At the end of the Pleistocene these ground squirrels extended their range north and west into open vegetation communities that developed when ice sheets melted and glacial lakes drained. They were subsequently extirpated from the Peace River region when forests replaced earlier pioneering vegetation communities.

scholarly journals Aspen parkland pasture altered by Richardson’s Ground Squirrel (Urocitellus richardsonii Sabine) activity: the good, the bad, and the not so ugly?

2016 ◽  
Vol 129 (4) ◽  
pp. 331 ◽  
Author(s):  
Levi J. Newediuk ◽  
Isobel Waters ◽  
James F. Hare
Keyword(s):  
Plant Community ◽  
Ground Squirrel ◽  
Trifolium Pratense ◽  
Red Clover ◽  
Ground Squirrels ◽  
Community Diversity ◽  
Nitrate Content ◽  
Ammonia Content ◽  
Aspen Parkland ◽  
Urocitellus Richardsonii

Although Richardson’s Ground Squirrels (Urocitellus richardsonii) are considered pests throughout their North American range, their impact on forage in Canadian aspen parkland has not been explored. We investigated the effect of Richardson’s Ground Squirrel density on forage quality and plant community composition in an intensely grazed cattle pasture in the aspen parkland region of Manitoba, Canada. We detected no significant differences in forage protein content or legume, grass, and litter biomass among ground squirrel density levels. However, ground squirrel density did influence the abundance of invasive and forage plant species; greater squirrel density reduced the prevalence of Smooth Brome (Bromus inermis Leysser) and Red Clover (Trifolium pratense L.) and increased the abundance of Quackgrass (Elymus repens (L.) Gould) and Black medick (Medicago lupulina L.). Plant community diversity also increased with ground squirrel density. There were no differences in soil bulk density or ammonia content among squirrel density levels; however, soil nitrate content was highest at low ground squirrel density. Changes in available soil nitrogen and relative abundances of forage species on this pasture may affect cattle diet by altering both the availability and quality of forage. Our findings highlight the need for further investigation of the role of Richardson’s Ground Squirrel on rangeland in the aspen parkland region to ascertain the generality of the effects documented in our study. Until such effects and their implications for cattle production are understood, land managers should refrain from exterminating colonies of Richardson’s Ground Squirrel.

Richardson’s ground squirrels (Urocitellus richardsonii) are associated primarily with intermediate levels of grassland, clay loam soils, and human development in Canadian mixed-grass prairies

2021 ◽  
Author(s):  
Ryan J Fisher ◽  
Ashley N. Vass ◽  
C. M. Somers ◽  
Ray G. Poulin
Keyword(s):  
Great Plains ◽  
Ground Squirrel ◽  
Large Scale ◽  
Habitat Associations ◽  
Ground Squirrels ◽  
Northern Great Plains ◽  
Clay Loam ◽  
Habitat Features ◽  
Important Habitat ◽  
Urocitellus Richardsonii

Richardson’s ground squirrel (Urocitellus richardsonii, Sabine 1822) is a widespread burrowing mammal on the Northern Great Plains. This species is a prominent prey item for a variety of predators, and its burrows provide important habitat for other wildlife; however, Richardson’s ground squirrel is also considered an economically damaging agricultural pest. Despite the ecological importance of Richardson’s ground squirrels and their status as pests, there are gaps in our knowledge about large-scale habitat associations for this species. In 2011 and 2012, we conducted 1840 road-side surveys in a 130,000-km2 area of southern Saskatchewan, Canada to understand which habitat features are associated with Richardson’s ground squirrel occurrence. Ground squirrels were observed on 8% of the surveys. Probability of ground squirrel occurrence was highest in areas with moderate amounts of grassland (approximately 30%), areas that were developed by humans (>30%), and had a high proportion of clay loam soils, presumably for burrowing. Our study highlights the importance of heterogeneous landscapes and that areas disturbed by humans may provide suitable vegetation structure for ground squirrels. This information can help to identify important habitat for species that rely on Richardson’s ground squirrels and identify areas where Richardson’s ground squirrels could come into conflict with agriculture.

scholarly journals Like mother, like daughter: heritability of female Richardson’s ground squirrel Urocitellus richardsonii cortisol stress responses

2017 ◽  
Vol 64 (2) ◽  
pp. 153-163 ◽  
Author(s):  
Kevin R Bairos-Novak ◽  
Calen P Ryan ◽  
Angela R Freeman ◽  
W Gary Anderson ◽  
James F Hare
Keyword(s):  
Stress Responses ◽  
Ground Squirrel ◽  
Urocitellus Richardsonii

scholarly journals High Spring Mortality of Adult Richardson’s Ground Squirrels, Urocitellus richardsonii, Associated with a Severe Rainstorm in Southwestern Saskatchewan

2012 ◽  
Vol 126 (2) ◽  
pp. 148
Author(s):  
Gilbert Proulx
Keyword(s):  
Mortality Rate ◽  
Ground Squirrel ◽  
Mortality Rates ◽  
Ground Squirrels ◽  
Natural Mortality ◽  
The Mean ◽  
Strong Winds ◽  
Heavy Rains ◽  
Urocitellus Richardsonii

Heavy rains with strong winds in southwestern Saskatchewan from 20 to 29 May 2010 flooded fields where adult Richardson’s Ground Squirrels (Urocitellus richardsonii) had recently been live–trapped. Natural mortality rates in six marked populations (n = 11 to 29 animals) ranged from 9.1 to 42.9%. The mean mortality rate of populations (28.9%) was significantly greater than that estimated for four populations (8.5%) studied in April and May 2007 and 2008 during drought periods. This finding is in agreement with past studies on other ground squirrel species which showed that spring snowstorms and heavy rains caused an increase in natural mortality rates.

scholarly journals Observations of Nocturnal Hunting Behaviour of American Badgers, Taxidea taxus, in Southwestern Saskatchewan

2013 ◽  
Vol 126 (3) ◽  
pp. 226
Author(s):  
Gilbert Proulx ◽  
Neil MacKenzie
Keyword(s):  
Ground Squirrel ◽  
Ground Squirrels ◽  
Taxidea Taxus ◽  
Hunting Behaviour ◽  
Urocitellus Richardsonii

This study describes the nocturnal hunting behaviour of American Badgers (Taxidea taxus) in areas inhabited by Richardson’s Ground Squirrels (Urocitellus richardsonii) in southwestern Saskatchewan. Adult American Badgers searched for prey by zigzagging through clusters of Richardson’s Ground Squirrel burrows or by going back and forth between one enlarged Richardson’s Ground Squirrel burrow and other adjacent burrows. American Badgers’ movements were not random and they were oriented to encounter prey.

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