AnAge entry for Trichechus manatus

Classification (HAGRID: 03637)

Taxonomy
Kingdom: Animalia
    Phylum: Chordata
        Class: Mammalia (Taxon entry)
            Order: Sirenia
                Family: Trichechidae
                    Genus: Trichechus
Species
Trichechus manatus
Common name
West Indian manatee
Synonyms
Trichecus manatus

Lifespan, ageing, and relevant traits

Maximum longevity
65 years (captivity)
Source
Aarin Allen, pers. comm.
Sample size
Medium
Data quality
Acceptable
Observations

Laboratory studies show that males are physiologically capable of mating when they are 2-3 years old. In the wild, however, they appear to reach full sexual maturity at the age of 9-10 years [0443]. Manatees may also feature some form of continuous tooth development [0002]. One 65 year-old male called "Snooty", born in 1948 and of the /latirostrus/ subspecies, was still alive in 2013 at the Parker Manatee Aquarium; although he had slowed down a bit and sleeped more, he was generally healthy and continued to make new teeth (Aarin Allen, pers. comm.) Another specimen was estimated to be 59 years old in the wild [0434].

Life history traits (averages)

Female sexual maturity
1,278 days
Male sexual maturity
913 days
Gestation
335 days
Weaning
456 days
Litter size
1 (viviparous)
Litters per year
0.4
Inter-litter interval
1,187 days
Weight at birth
32,000 g
Weight at weaning
Adult weight
322,000 g
Postnatal growth rate
0.0024 days-1 (from Gompertz function)
Maximum longevity residual
191%

Metabolism

Typical body temperature
Not yet available
Basal metabolic rate
70.0056 W
Body mass
450000.0 g
Metabolic rate per body mass
0.000156 W/g

References

External Resources

Integrated Taxonomic Information System
ITIS 180684
Animal Diversity Web
ADW account
Encyclopaedia of Life
Search EOL
NCBI Taxonomy
Taxonomy ID 9778
Entrez
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Ageing Literature
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Internet
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