|Scientific Name:||Coregonus gutturosus|
|Species Authority:||(Gmelin, 1818)|
|Red List Category & Criteria:||Extinct ver 3.1|
|Assessor/s:||Freyhof, J. & Kottelat, M.|
|Reviewer/s:||Bogutskaya, N., & Smith, K. (IUCN Freshwater Biodiversity Unit)|
The species was endemic to Lake Costance and was a commercial species in the 1960s but it is thought to have become Extinct in the 1970s when the eutrophicaton of the Lake peaked, which is said to have impacted egg development. It has not been recorded since in spite of several surveys over the past 10 years specifically to find the species as the conditions in the lake have improved.
|Range Description:||Lake Constance (Switzerland, Germany, Austria).|
Regionally extinct:Austria; Germany; Switzerland
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Thought to have gone extinct in the early 1970s.|
|Habitat and Ecology:||
Lacustrine, in deep water. Spawns in 10-60 m water depth.
Spawns in July-November. After spawning migrates to deeper places, at depths of up to about 140 m. Migrates to 50-60 m in March-April. Feeds on benthic invertebrates (especially mussels and snails).
|Major Threat(s):||Eutrophication which peaked in 1979. Natural reproduction in coregonids is said to have almost stopped during the period of high eutrophication as the eggs could no longer develop in the low-oxygen substrates.|
|Citation:||Freyhof, J. & Kottelat, M. 2008. Coregonus gutturosus. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 12 March 2014.|
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