AnAge entry for Enhydra lutris

Classification (HAGRID: 02622)

Taxonomy
Kingdom: Animalia
    Phylum: Chordata
        Class: Mammalia (Taxon entry)
            Order: Carnivora
                Family: Mustelidae
                    Genus: Enhydra
Species
Enhydra lutris
Common name
Sea otter
Synonyms
Mustela lutris

Lifespan, ageing, and relevant traits

Maximum longevity
27 years (captivity)
Source
ref. 671
Sample size
Medium
Data quality
Acceptable
Observations

There is a delayed implantation and the total gestation time varies from 4 to 12 months. The actual embryonic development takes about 4-5.5 months [0443]. It has been suggested that longevity in the wild may be as high as 30 years [0542], which is dubious. One wild born female was about 27 years old when she died in captivity [0671].

Life history traits (averages)

Female sexual maturity
974 days
Male sexual maturity
1,369 days
Gestation
140 days
Weaning
175 days
Litter size
1 (viviparous)
Litters per year
0.8
Inter-litter interval
548 days
Weight at birth
1,868 g
Weight at weaning
13,425 g
Adult weight
25,850 g
Postnatal growth rate
Maximum longevity residual
116%

Metabolism

Typical body temperature
311ºK or 37.5ºC or 99.5ºF
Basal metabolic rate
98.4790 W
Body mass
26832.8 g
Metabolic rate per body mass
0.003670 W/g

References

External Resources

Integrated Taxonomic Information System
ITIS 180547
Animal Diversity Web
ADW account
Encyclopaedia of Life
Search EOL
NCBI Taxonomy
Taxonomy ID 34882
Entrez
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Ageing Literature
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Images
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Internet
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