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AnAge entry for Spermophilus beldingi

Classification (HAGRID: 03495)
TaxonomyKingdom: Animalia
    Phylum: Chordata
        Class: Mammalia (Taxon entry)
            Order: Rodentia
                Family: Sciuridae
                    Genus: Spermophilus
SpeciesSpermophilus beldingi
Common nameBelding's ground squirrel

Lifespan, ageing, and relevant traits

Maximum longevityNot yet established
Observations

Little is known about the longevity of these animals. It has been estimated that they live over 11 years in the wild [0434], but more studies are necessary.

Life history traits (averages)

Female sexual maturity365 days
Male sexual maturity547 days
Gestation26 days
Weaning24 days
Litter size5.7 (viviparous)
Litters per year1
Inter-litter interval
Weight at birth6.87 g
Weight at weaning55 g
Adult weight290 g
Postnatal growth rate0.0545 days-1 (from Gompertz function)

Metabolism

Typical body temperature309ºK or 35.5ºC or 95.9ºF
Basal metabolic rate0.7960 W
Body mass293.7 g
Metabolic rate per body mass0.002710 W/g

References
[0036] Savage et al. (2004), The predominance of quarter-power scaling in biology
[0420] White and Seymour (2003), Mammalian basal metabolic rate is proportional to body mass2/3, PubMed
[0434] Ronald Nowak (1999), Walker's Mammals of the World
[0455] Virginia Hayssen et al. (1993), Asdell's Patterns of Mammalian Reproduction: A Compendium of Species-Specific Data
[0731] Zullinger et al. (1984), Fitting sigmoid equations to mammalian growth curves

External resources

Integrated Taxonomic Information SystemITIS 180149
Animal Diversity WebADW account
Encyclopedia of LifeSearch EOL
Genome ProjectSearch NCBI
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