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AnAge entry for Eumetopias jubatus

Classification (HAGRID: 02564)
TaxonomyKingdom: Animalia
    Phylum: Chordata
        Class: Mammalia (Taxon entry)
            Order: Carnivora
                Family: Otariidae
                    Genus: Eumetopias
SpeciesEumetopias jubatus
Common nameNorthern sea lion
SynonymsPhoca jubata, Otaria stellerii, Arctocephalus monteriensis

Lifespan, ageing, and relevant traits

Maximum longevity32.8 years (captivity)
Sourceref. 671
Sample sizesmall
Data qualityacceptable
Observations

The total gestation time of approximately 1 year includes a 3-4 months period of delayed implantation [0443]. In the wild, females have been estimated to live up to 30 years [0001]. Males live less due to fights with other males. Record longevity in captivity, however, belongs to one wild born male who was about 32.8 years of age when he died in captivity [0671].

Life history traits (averages)

Female sexual maturity1,780 days
Male sexual maturity2,420 days
Gestation274 days
Weaning279 days
Litter size1 (viviparous)
Litters per year1
Inter-litter interval365 days
Weight at birth19,000 g
Weight at weaning106,610 g
Adult weight415,000 g
Postnatal growth rate
Maximum longevity residual92 %

Metabolism

No information on metabolism available.

References
[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
[0538] Don Wilson and Sue Ruff (1999), The Smithsonian Book of North American Mammals
[0434] Ronald Nowak (1999), Walker's Mammals of the World
[0441] William Burt et al. (1998), A Field Guide to Mammals
[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
[0001] Longevity Records: Life Spans of Mammals, Birds, Amphibians, Reptiles, and Fish

External resources

Integrated Taxonomic Information SystemITIS 180625
Animal Diversity WebADW account
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