|Scientific Name:||Gasterosteus crenobiontus|
|Species Authority:||Bǎcescu & Mayer, 1956|
|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 last recorded in the 1960's. The extinction is a result of hybridisation with G. aculeatus. The springs inhabited by G. crenobiontus used to be separated from the habitat of G. aculeatus by a hypersaline lake that served as a barrier between the species. Irrigation works transformed the lake into a brackish one, which was invaded by migratory G. aculeatus. Survey work since the 1960's, most recently in 1998, have failed to find the species.
|Range Description:||Romania: freshwater springs of hypersaline littoral Lake Techirghiol (south of Constanta).|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Last recorded in the 1960's. Further surveys, most recently in 1998, all failed to find the species.|
|Habitat and Ecology:||
Spawns during an extended period, in February-October.
|Major Threat(s):||Hybridisation with G. aculeatus which invaded its habitat when irrigation transformed the hypersaline lake which served as a natural barrier between the two species.|
|Citation:||Freyhof, J. & Kottelat, M. 2008. Gasterosteus crenobiontus. The IUCN Red List of Threatened Species 2008: e.T135637A4167779. http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T135637A4167779.en . Downloaded on 09 October 2015.|
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