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AnAge entry for Leptonychotes weddellii

Classification (HAGRID: 02574)
TaxonomyKingdom: Animalia
    Phylum: Chordata
        Class: Mammalia (Taxon entry)
            Order: Carnivora
                Family: Phocidae
                    Genus: Leptonychotes
SpeciesLeptonychotes weddellii
Common nameWeddell seal

Lifespan, ageing, and relevant traits

Maximum longevityNot yet established
Observations

The total gestation time probably includes a period of delayed implantation [0443]. In the wild, females have been estimated to live up to 25 years [0542]. Their longevity in captivity has not been studied in detail.

Life history traits (averages)

Female sexual maturity1,365 days
Male sexual maturity1,642 days
Gestation304 days
Weaning40 days
Litter size1 (viviparous)
Litters per year
Inter-litter interval548 days
Weight at birth29,000 g
Weight at weaning115,900 g
Adult weight425,000 g
Postnatal growth rate

Metabolism

No information on metabolism available.

References
[0443] Ronald Nowak (2003), Walker's Marine Mammals of the World
[0455] Virginia Hayssen et al. (1993), Asdell's Patterns of Mammalian Reproduction: A Compendium of Species-Specific Data
[0542] Bernhard Grzimek (1990), Grzimek's Encyclopedia of Mammals
[0573] David Macdonald (1985), The Encyclopedia of Mammals

External resources

Integrated Taxonomic Information SystemITIS 180669
Animal Diversity WebADW account
Encyclopedia of LifeSearch EOL
Genome ProjectSearch NCBI
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