AnAge entry for Tamiasciurus hudsonicus
Classification (HAGRID: 03186)
- Taxonomy
-
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia (Taxon entry)
Order: Rodentia
Family: Sciuridae
Genus: Tamiasciurus
- Species
- Tamiasciurus hudsonicus
- Common name
- Red squirrel
Lifespan, ageing, and relevant traits
- Maximum longevity
- 9.8 years (captivity)
- Source
- ref. 671
- Sample size
- Tiny
- Data quality
- Acceptable
- Observations
One captive specimen lived 9.8 years [0671]. In high density conditions selection favours faster growing offspring, which then have reduced adult lifespans [1284].
Life history traits (averages)
- Female sexual maturity
- 342 days
- Male sexual maturity
- Gestation
- 37 days
- Weaning
- 63 days
- Litter size
- 4.2 (viviparous)
- Litters per year
- 1.7
- Inter-litter interval
- Weight at birth
- 7 g
- Weight at weaning
- 83.8 g
- Adult weight
- 200 g
- Postnatal growth rate
- 0.0216 days-1 (from Gompertz function)
- Maximum longevity residual
- 89%
Metabolism
- Typical body temperature
- 312ºK or 38.7ºC or 101.7ºF
- Basal metabolic rate
- 1.6150 W
- Body mass
- 219.6 g
- Metabolic rate per body mass
- 0.007354 W/g
References
- [1284] Dantzer et al. (2013), Density triggers maternal hormones that increase adaptive offspring growth in a wild mammal (PubMed)
- [0904] Descamps et al. (2009), Survival costs of reproduction vary with age in North American red squirrels (PubMed)
- [0777] Harper et al. (2007), Skin-derived fibroblasts from long-lived species are resistant to some, but not all, lethal stresses and to the mitochondrial inhibitor rotenone (PubMed)
- [0671] Richard Weigl (2005), Longevity of Mammals in Captivity; from the Living Collections of the World
- [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)
- [0610] Ernest (2003), Life history characteristics of placental non-volant mammals
- [0434] Ronald Nowak (1999), Walker's Mammals of the World
- [0676] Purvis and Harvey (1995), Mammal life-history evolution: a comparative test of Charnov's model
- [0455] Virginia Hayssen et al. (1993), Asdell's Patterns of Mammalian Reproduction: A Compendium of Species-Specific Data
- [0542] Bernhard Grzimek (1990), Grzimek's Encyclopedia of Mammals
- [0680] Wootton (1987), The effects of body mass, phylogeny, habitat, and trophic level on mammalian age at first reproduction
- [0731] Zullinger et al. (1984), Fitting sigmoid equations to mammalian growth curves
External Resources
- Integrated Taxonomic Information System
- ITIS 180166
- Animal Diversity Web
- ADW account (if available)
- Encyclopaedia of Life
- Search EOL
- NCBI Taxonomy
- Taxonomy ID 10009
- Entrez
- Search all databases
- Ageing Literature
- Search Google Scholar or Search PubMed
- Images
- Google Image search
- Internet
- Search Google