Shortjaw kōkopu
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The shortjaw kōkopu (Galaxias postvectis) is a galaxiid ray-finned fish, endemic to New Zealand.[1][2] They are large, scaleless fish which inhabit stable pools in cascading, bouldery streams with forest cover.[3] Shortjaw kōkopu are amphidromous, with the fry going to sea after hatching, and returning as juveniles to fresh water where they grow to adulthood.[3] They may grow to a maximum of Script error: No such module "convert". in total length, but more commonly reach Script error: No such module "convert"..[3]
The shortjaw kōkopu live in microhabitats that have more large particles at the bed of the body of water (substrates) and more places to seek safety compared to all nearby possible habitats.[4][5] During the night, they remain in calmer areas like pools, whereas during the day shortjaw kōkopu spend their time in places with large substrates and a more tumultuous water surface, staying in both flow channel and pool habits.[6]
In 2023 a newly recorded population of this species was detected in the Kopuawhara catchment north of Māhia Peninsula in Hawkes Bay using environmental DNA.[7]
References
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External links
- New Zealand native freshwater galaxiid fish, Shortjaw kokopu TerraNature, Auckland 2010
- Shortjaw kōkopu discussed on RNZ Critter of the Week, 15 May 2020