AnAge entry for Callorhinus ursinus

Classification (HAGRID: 02214)

Taxonomy: Kingdom: Animalia
    Phylum: Chordata
        Class: Mammalia (Taxon entry)
            Order: Carnivora
                Family: Otariidae
                    Genus: Callorhinus
Species: Callorhinus ursinus
Common name: Northern fur seal
Synonyms: Phoca ursina, Otaria krachenninikowii, Callorhinus curilensis, Phoca nigra, Siren cynocephala, Phoca minima, Arctocephalus californianus, Callorhinus alascanus

Maximum longevity: Not yet established
Observations: After fertilization, implantation is delayed for 3.5 to 4 months, making the total gestation period to be approximately 11.75 months [0443]. In the wild, females have been estimated to live more than 30 years [0001], which is possible but unverified. Their longevity in captivity has not been studied in detail but one wild born specimen was about 25.1 years old when it died in captivity [0671].

No information on metabolism is available.

[1143] Nussey et al. (2013), Senescence in natural populations of animals: widespread evidence and its implications for bio-gerontology (PubMed)
[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
[0443] Ronald Nowak (2003), Walker's Marine Mammals of the World
[0610] Ernest (2003), Life history characteristics of placental non-volant mammals
[0001] Carey and Judge (2000), Longevity Records: Life Spans of Mammals, Birds, Amphibians, Reptiles, and Fish
[0434] Ronald Nowak (1999), Walker's Mammals of the World
[0441] William Burt et al. (1998), A Field Guide to Mammals
[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
[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