AnAge entry for Oryzias latipes

Classification (HAGRID: 03440)

Taxonomy: Kingdom: Animalia
    Phylum: Chordata
        Class: Teleostei
            Order: Beloniformes
                Family: Adrianichthyidae
                    Genus: Oryzias
Species: Oryzias latipes
Common name: Japanese medaka

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].

: No information is available on life history. Please contact us if you wish to suggest or contribute data.

No information on metabolism is available.

[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)