AnAge entry for Delphinapterus leucas

Classification (HAGRID: 02657)
Taxonomy	Kingdom: Animalia Phylum: Chordata Class: Mammalia (Taxon entry) Order: Cetacea (Taxon entry) Family: Monodontidae Genus: Delphinapterus
Species	Delphinapterus leucas
Common name	Beluga
Lifespan, ageing, and relevant traits
Maximum longevity	40 years (captivity)
Source	ref. 671
Sample size	medium
Data quality	acceptable
Observations	It is estimated that these animals may live up to 40 years in the wild [0573]. One wild born specimen was still alive in captivity at about 34 years of age [0671]. Maximum longevity could be underestimated.
Life history traits (averages)
Female sexual maturity	1,644 days
Male sexual maturity	2,283 days
Gestation	416 days
Weaning	679 days
Litter size	1 (viviparous)
Litters per year	0.3
Inter-litter interval	1,004 days
Weight at birth	66,000 g
Weight at weaning
Adult weight	1,430,000 g
Postnatal growth rate
Metabolism
No information on metabolism available.
References
[0671] Richard Weigl (2005), Longevity of Mammals in Captivity; from the Living Collections of the World [0434] Ronald Nowak (1999), Walker's Mammals of the World [0538] Don Wilson and Sue Ruff (1999), The Smithsonian Book of North American 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 [0573] David Macdonald (1985), The Encyclopedia of Mammals
External resources
Integrated Taxonomic Information System	ITIS 180483
Animal Diversity Web	ADW account
Encyclopedia of Life	Search EOL
Genome Project	Search NCBI
Entrez	Search all databases Entrez Taxonomy search
Ageing literature	Search Google Scholar Search PubMed Search Scirus
Images	Google Image search
Internet	Search Google

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