AnAge entry for Antilocapra americana

Classification (HAGRID: 02243)
Taxonomy	Kingdom: Animalia Phylum: Chordata Class: Mammalia (Taxon entry) Order: Artiodactyla Family: Antilocapridae Genus: Antilocapra
Species	Antilocapra americana
Common name	Pronghorn
Synonyms	Antilocapra anteflexa, Antilope americana
Lifespan, ageing, and relevant traits
Maximum longevity	15.5 years (captivity)
Source	ref. 671
Sample size	medium
Data quality	acceptable
Observations	In the wild, these animals tend to live less than 10 years [0542], though there are anecdotal reports of wild animals living as much as 15 years. One captive specimen lived 15.5 years [0671].
Life history traits (averages)
Female sexual maturity	547 days
Male sexual maturity	547 days
Gestation	235 days
Weaning	91 days
Litter size	2 (viviparous)
Litters per year	1
Inter-litter interval	365 days
Weight at birth	3,000 g
Weight at weaning	8,900 g
Adult weight	46,100 g
Postnatal growth rate	0.0083 days^-1 (from Gompertz function)
Maximum longevity residual	61 %
Metabolism
Typical body temperature	311ºK or 38.0ºC or 100.4ºF
Basal metabolic rate	50.9730 W
Body mass	34779.3 g
Metabolic rate per body mass	0.001466 W/g
References
[0817] Bielby et al. (2007), The fast-slow continuum in mammalian life history: an empirical reevaluation, 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 [0538] Don Wilson and Sue Ruff (1999), The Smithsonian Book of North American Mammals [0441] William Burt et al. (1998), A Field Guide to Mammals [0677] Saether and Gordon (1994), The adaptive significance of reproductive strategies in ungulates, PubMed [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 180717
Animal Diversity Web	ADW account
Encyclopedia of Life	Search EOL
Genome Project	Search NCBI
Entrez	Search all databases Entrez Taxonomy search
Ageing literature	Search Google Scholar Search PubMed Search Scirus
Images	Google Image search
Internet	Search Google

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