AnAge entry for Urocitellus richardsonii

Classification (HAGRID: 02823)

Taxonomy
Kingdom: Animalia
    Phylum: Chordata
        Class: Mammalia (Taxon entry)
            Order: Rodentia
                Family: Sciuridae
                    Genus: Urocitellus
Species
Urocitellus richardsonii
Common name
Richardson's ground squirrel
Synonyms
Spermophilus richardsonii

Lifespan, ageing, and relevant traits

Maximum longevity
Not yet established
Observations

They are sexually mature at emergence from their first hibernation. In the wild, females have been known to live more than 6 years, though males do not appear to live more than 4 years [0634].

Life history traits (averages)

Female sexual maturity
335 days
Male sexual maturity
335 days
Gestation
24 days
Weaning
36 days
Litter size
6.06 (viviparous)
Litters per year
1
Inter-litter interval
Weight at birth
6.35 g
Weight at weaning
92.8 g
Adult weight
342.5 g
Postnatal growth rate
0.0559 days-1 (from Gompertz function)

Metabolism

Typical body temperature
309ºK or 35.4ºC or 95.8ºF
Basal metabolic rate
0.7880 W
Body mass
266.3 g
Metabolic rate per body mass
0.002959 W/g

References

External Resources

Integrated Taxonomic Information System
ITIS 930322
Animal Diversity Web
ADW account (if available)
Encyclopaedia of Life
Search EOL
NCBI Taxonomy
Taxonomy ID 37591
Entrez
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Ageing Literature
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Internet
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