|Scientific Name:||Prototroctes oxyrhynchus|
|Species Authority:||Günther, 1870|
|Red List Category & Criteria:||Extinct ver 2.3|
|Assessor/s:||World Conservation Monitoring Centre|
The last recorded specimen of Prototroctes oxyrhynchus was brought to the British Museum in the 1930s, however, the origin and date of collection were not noted.
|Range Description:||Prototroctes oxyrhynchus was endemic to New Zealand.|
Regionally extinct:New Zealand
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||The species was abundant at the time of European settlement in the 1860s, but population decline was noted by the late 1870s. The disappearance of the fish from the Waikato River was noted in 1874, and by 1900 the species was apparently rare. There are reports of grayling being caught in the 1920s and in the early 1930s a specimen, possibly the last, was brought to the British Museum, however, the origin and date of collection were not noted.|
|Habitat and Ecology:||The New Zealand grayling was an amphidromous species, inhabiting freshwater, brackish and marine environments. Spawning apparently occurred in freshwater streams and hatched larvae made their way downstream to the sea where they remained until maturity and returned to freshwater spawning areas.|
|Major Threat(s):||The extinction of this species was possibly due to a combination of the effects of introduced trout and the deterioration of the freshwater habitat through the clearance of forest cover resulting in increased light penetration and raised water temperature.|
Baillie, J. and Groombridge, B. 1996. 1996 IUCN Red List of Threatened Animals. International Union for Conservation of Nature, Gland, Switzerland.
Groombridge, B. (ed.). 1994. 1994 IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland and Cambridge, UK.
IUCN. 1990. IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland and Cambridge, UK.
IUCN Conservation Monitoring Centre. 1986. 1986 IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland and Cambridge, UK.
IUCN Conservation Monitoring Centre. 1988. 1988 IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland and Cambridge, UK.
McDowall, R.M. 1978. Family Proctotroctidae. In: New Zealand Freshwater Fishes: a guide and natural history. Heinemann Educational Books Ltd, Auckland, New Zealand.
McDowall, R.M. 1990. Freshwater fishes and fisheries of New Zealand -The angler's Eldorado. Aquatic Science 2(2): 281-341.
|Citation:||World Conservation Monitoring Centre 1996. Prototroctes oxyrhynchus. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 10 March 2014.|
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