AnAge entry for Callorhinus ursinus

Classification (HAGRID: 02665)

Taxonomy
Kingdom: Animalia
    Phylum: Chordata
        Class: Mammalia (Taxon entry)
            Order: Carnivora
                Family: Otariidae
                    Genus: Callorhinus
Species
Callorhinus ursinus
Common name
Northern fur seal

Lifespan, ageing, and relevant traits

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].

Life history traits (averages)

Female sexual maturity
1,095 days
Male sexual maturity
2,007 days
Gestation
240 days
Weaning
107 days
Litter size
1.3 (viviparous)
Litters per year
0.9
Inter-litter interval
365 days
Weight at birth
5,281 g
Weight at weaning
12,925 g
Adult weight
165,500 g
Postnatal growth rate
0.0007 days-1 (from Gompertz function)

Metabolism

No information on metabolism is available.

References

External Resources

Integrated Taxonomic Information System
ITIS 180627
Animal Diversity Web
ADW account
Encyclopaedia of Life
Search EOL
NCBI Taxonomy
Taxonomy ID 34884
Entrez
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Ageing Literature
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