AnAge entry for Psammomys obesus
Classification (HAGRID: 03074)
- Taxonomy
-
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia (Taxon entry)
Order: Rodentia
Family: Muridae
Genus: Psammomys
- Species
- Psammomys obesus
- Common name
- Fat sand rat
- Synonyms
- Psammomys algiricus, Psammomys roudairei, Psammomys tripolitanus, Psammomys obesus dianae, Psammomys obesus nicolli, Psammomys obesus terraesanctae
Lifespan, ageing, and relevant traits
- Maximum longevity
- 3.2 years (captivity)
- Source
- ref. 671
- Sample size
- Medium
- Data quality
- Acceptable
- Observations
Used as a biomedical model of nutritionally-induced diabetes type 2 and obesity. Record longevity in captivity is 3.2 years [0671]. In one study, degeneration of the intervertebral disks was observed from 6 months of age [0885].
Life history traits (averages)
- Female sexual maturity
- 100 days
- Male sexual maturity
- Gestation
- 24 days
- Weaning
- 28 days
- Litter size
- 3.5 (viviparous)
- Litters per year
- Inter-litter interval
- 38 days
- Weight at birth
- 6.25 g
- Weight at weaning
- 40 g
- Adult weight
- 212 g
- Postnatal growth rate
- 0.0304 days-1 (from Gompertz function)
- Maximum longevity residual
- 28%
Metabolism
No information on metabolism is available.
References
- [0671] Richard Weigl (2005), Longevity of Mammals in Captivity; from the Living Collections of the World
- [0888] Ziv et al. (1999), Changing pattern of prevalence of insulin resistance in Psammomys obesus, a model of nutritionally induced type 2 diabetes (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
- [0887] Silberberg et al. (1989), Age-related changes in fibronectin in annulus fibrosus of the sand rat (Psammomys obesus) (PubMed)
- [0886] Silberberg (1988), Histologic and morphometric observations on vertebral bone of aging sand rats (PubMed)
- [0884] Ulmansky et al. (1984), Dental abnormalities in aging sand rats (Psammomys obesus) (PubMed)
- [0731] Zullinger et al. (1984), Fitting sigmoid equations to mammalian growth curves
- [0885] Silberberg et al. (1979), Degeneration of the intervertebral disks and spondylosis in aging sand rats (PubMed)
External Resources
- Integrated Taxonomic Information System
- ITIS 632993
- Animal Diversity Web
- ADW account
- Encyclopaedia of Life
- Search EOL
- NCBI Taxonomy
- Taxonomy ID 48139
- Entrez
- Search all databases
- Ageing Literature
- Search Google Scholar or Search PubMed
- Images
- Google Image search
- Internet
- Search Google