Biology:Shortjaw kōkopu
| Shortjaw kōkopu | |
|---|---|
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| Adult shortjaw kōkopu | |
,_Heao_Stream,_Waitaanga_Forest._Photo_by_Stella_McQueen.jpg)
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| Adult shortjaw kōkopu showing orange colouration | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Galaxiiformes |
| Family: | Galaxiidae |
| Genus: | Galaxias |
| Species: | G. postvectis
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| Binomial name | |
| Galaxias postvectis F. E. Clarke, 1899
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The shortjaw kōkopu (Galaxias postvectis) is a galaxiid fish, endemic to New Zealand.[2][3] They are large, scaleless fish which inhabit stable pools in cascading, bouldery streams with forest cover.[4] Shortjaw kōkopu are amphidromous, with the fry going to sea after hatching, and returning as juveniles to fresh water where they grow to adulthood.[4] They may grow to a maximum of 350 mm (14 in) in total length, but more commonly reach 150–200 mm (5.9–7.9 in).[4]
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.[5][6] 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.[7]
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.[8]
References
- ↑ West, D.; David, B.; Hitchmough, R.; Champion, P.; Ling, N.; Allibone, R.; Crow, S. (2014). "Galaxias postvectis". IUCN Red List of Threatened Species 2014: e.T8813A3147213. doi:10.2305/IUCN.UK.2014-3.RLTS.T8813A3147213.en. https://www.iucnredlist.org/species/8813/3147213. Retrieved 12 November 2021.
- ↑ "Shortjaw kōkopu" (in en). 2009-06-04. https://niwa.co.nz/our-science/freshwater/tools/kaitiaki_tools/species/shortjawed-kokopu.
- ↑ "Galaxias postvectis, Shortjaw kokopu : fisheries". https://fishbase.mnhn.fr/summary/Galaxias-postvectis.html.
- ↑ 4.0 4.1 4.2 McDowall, R.M. (2000). The Reed Field Guide to New Zealand Freshwater Fishes. Auckland: Reed. ISBN 0 7900 0725 8.
- ↑ McQueen, Stella (2013). A photographic guide to freshwater fishes of New Zealand. Rod Morris. Auckland. ISBN 978-1-86966-386-5. OCLC 858411018. https://www.worldcat.org/oclc/858411018.
- ↑ "Shortjaw kokopu" (in en). 2007-02-28. https://niwa.co.nz/freshwater/nzffd/NIWA-fish-atlas/fish-species/shortjaw_kokopu.
- ↑ McEwan, Amber Julie; Joy, Michael Kevin (August 2014). "Diel habitat use of two sympatric galaxiid fishes (Galaxias brevipinnis and G. postvectis) at two spatial scales in a small upland stream in Manawatu, New Zealand" (in en). Environmental Biology of Fishes 97 (8): 897–907. doi:10.1007/s10641-013-0191-x. ISSN 0378-1909. http://link.springer.com/10.1007/s10641-013-0191-x.
- ↑ "Regional council detects rare fish in Hawke's Bay using DNA traces" (in en-NZ). 2023-07-31. https://www.nzherald.co.nz/hawkes-bay-today/news/threatened-native-whitebait-species-discovered-in-hawkes-bay/JDCW2PCO3RCYHLZZNFMBDVAFSE/.
External links
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Wikimedia Commons has media related to Shortjaw kōkopu. |
- New Zealand native freshwater galaxiid fish, Shortjaw kokopu TerraNature, Auckland 2010
- Shortjaw kōkopu discussed on RNZ Critter of the Week, 15 May 2020
Wikidata ☰ Q44154 entry
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