AnAge entry for Oryzias latipes
Classification (HAGRID: 03810)
- Taxonomy
-
Kingdom: Animalia
Phylum: Chordata
Class: Teleostei
Order: Beloniformes
Family: Adrianichthyidae
Genus: Oryzias
- Species
- Oryzias latipes
- Common name
- Japanese medaka
Lifespan, ageing, and relevant traits
- Maximum longevity
- 5 years (captivity)
- Source
- ref. 683
- Sample size
- Medium
- Data quality
- Acceptable
- Observations
These animals show a clear ageing phenotype with increasing mortality with age. In one study in captivity, most long-lived animals were found to be males [0683], however more recent studies indicate the females live longer [1204]. With age they became large, pale, bloated, and dull in movement [0683]. Female Japanese medaka share similar estrogen biology with mammals and demonstrate a decline in estrogen levels with ageing. Estrogen levels have been found to correlate with telomere length and telomerase activity in females [1204].
Life history traits (averages)
- Female sexual maturity
- Male sexual maturity
- Incubation
- 10 days
- Adult weight
Metabolism
No information on metabolism is available.
References
- [1204] Gopalakrishnan et al. (2013), Medaka fish exhibits longevity gender gap, a natural drop in estrogen and telomere shortening during aging: a unique model for studying sex-dependent longevity (PubMed)
- [0836] Hatakeyama et al. (2008), The teleost Oryzias latipes shows telomere shortening with age despite considerable telomerase activity throughout life (PubMed)
- [0524] Patnaik et al. (1994), Ageing in fishes (PubMed)
- [0686] Ghoneum and Egami (1982), Age related changes in morphology of the thymus of the fish, Oryzias latipes (PubMed)
- [0685] Shima and Egami (1978), Absence of systematic polyploidization of hepatocyte nuclei during the ageing process of the male medaka, Oryzias latipes (PubMed)
- [0684] Egami and Eto (1973), Effect of x-irradiation during embryonic stage on life span in the fish, Oryzias latipes (PubMed)
- [0683] Egami (1971), Further notes on the life span of the teleost, Oryzias latipes (PubMed)
- [0682] Egami and Etoh (1969), Life span data for the small fish, Oryzias latipes (PubMed)
External Resources
- Integrated Taxonomic Information System
- ITIS 165622
- Animal Diversity Web
- ADW account (if available)
- Encyclopaedia of Life
- Search EOL
- NCBI Taxonomy
- Taxonomy ID 8090
- Entrez
- Search all databases
- Ageing Literature
- Search Google Scholar or Search PubMed
- Images
- Google Image search
- Internet
- Search Google