AnAge entry for Odobenus rosmarus

Classification (HAGRID: 02658)

Taxonomy
Kingdom: Animalia
    Phylum: Chordata
        Class: Mammalia (Taxon entry)
            Order: Carnivora
                Family: Odobenidae
                    Genus: Odobenus
Species
Odobenus rosmarus
Common name
Walrus

Lifespan, ageing, and relevant traits

Maximum longevity
Not yet established
Observations

In the wild, walrus have been estimated to live over 40 years [0542]. Their longevity in captivity has not been studied in detail and hence information on ageing is limited. One wild born specimen was about 30.6 years old when it died in captivity [0671]. Atherosclerosis was described in a 25 year-old captive animal [0555].

Life history traits (averages)

Female sexual maturity
1,745 days
Male sexual maturity
2,635 days
Gestation
331 days
Weaning
730 days
Litter size
1 (viviparous)
Litters per year
0.5
Inter-litter interval
834 days
Weight at birth
60,000 g
Weight at weaning
200,000 g
Adult weight
1,012,500 g
Postnatal growth rate
0.0009 days-1 (from Gompertz function)

Metabolism

No information on metabolism is available.

References

External Resources

Integrated Taxonomic Information System
ITIS 180639
Animal Diversity Web
ADW account
Encyclopaedia of Life
Search EOL
NCBI Taxonomy
Taxonomy ID 9707
Entrez
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Ageing Literature
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Internet
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