AnAge entry for Bos grunniens
Classification (HAGRID: 01907)
- Taxonomy
-
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia (Taxon entry)
Order: Artiodactyla
Family: Bovidae
Genus: Bos
- Species
- Bos grunniens
- Common name
- Yak
Lifespan, ageing, and relevant traits
- Maximum longevity
- 26.3 years (captivity)
- Source
- ref. 671
- Sample size
- Large
- Data quality
- High
- Observations
The yak reaches full size in 6-8 years. In the wild, these animals have been estimated to live up to 25 years [0434]. One captive specimen was still living after 26.3 years [0671].
Life history traits (averages)
- Female sexual maturity
- 738 days
- Male sexual maturity
- 738 days
- Gestation
- 274 days
- Weaning
- 228 days
- Litter size
- 1 (viviparous)
- Litters per year
- 0.8
- Inter-litter interval
- Weight at birth
- 18,000 g
- Weight at weaning
- Adult weight
- 667,000 g
- Postnatal growth rate
- Maximum longevity residual
- 69%
Metabolism
- Typical body temperature
- 311ºK or 38.0ºC or 100.4ºF
- Basal metabolic rate
- Not yet available
References
- [1389] Hoffman and Valencak (2020), A short life on the farm: aging and longevity in agricultural, large-bodied mammals (PubMed)
- [0671] Richard Weigl (2005), Longevity of Mammals in Captivity; from the Living Collections of the World
- [0610] Ernest (2003), Life history characteristics of placental non-volant mammals
- [1004] Han et al. (2002), Effects of high altitude and season on fasting heat production in the yak Bos grunniens or Poephagus grunniens (PubMed)
- [0434] Ronald Nowak (1999), Walker's Mammals of the World
- [0107] Tonami and Takahashi (1997), Effects of aging on tensile fatigue strength of bovine dentin (PubMed)
- [0455] Virginia Hayssen et al. (1993), Asdell's Patterns of Mammalian Reproduction: A Compendium of Species-Specific Data
- [0106] Gaczynska et al. (1986), Proteolytic susceptibility of membrane proteins during erythrocyte aging (PubMed)
- [0541] Tibetan Yaks
External Resources
- Integrated Taxonomic Information System
- ITIS 183840
- Animal Diversity Web
- ADW account
- Encyclopaedia of Life
- Search EOL
- NCBI Taxonomy
- Taxonomy ID 30521
- Entrez
- Search all databases
- Ageing Literature
- Search Google Scholar or Search PubMed
- Images
- Google Image search
- Internet
- Search Google