|Scientific Name:||Salmo schiefermuelleri|
|Species Authority:||Bloch, 1784|
|Taxonomic Notes:||Ancient literature records the presence of deepwater trout in several subalpine lakes of Austria, Germany and Switzerland. Some records are ambiguous and probably refer to lacustrine ecotypes of S. trutta. Others are more detailed and indicate that different stocks existed. There is no indication whether and which of these populations survive; some may still be extant, but they do not seem to have received attention. Here, Kottelat and Freyhoff (2007) tentatively use the name S. schiefermuelleri. As originally described, S. schiefermuelleri was a heterogeneous assemblage of several species and Kottelat and Freyhoff (2007) restricted it to the 'mayforelle' of the Austrian lakes (mayforelle is apparently still used locally, but not for the original stock). The 'schwebforelle' of Lake Vierwaldstätter (Switzerland) has a somewhat similar appearance but is unlikely to belong to the same lineage as S. schiefermuelleri as they occur in different drainages. Other populations known from some Alpine lakes, exhibit distinctive phenotypes and it is still unclear whether or not they are reproductively isolated. One such case is the Engadine trout (Lakes St. Moritz and Silsersee, Switzerland, Danube drainage), which has a distinctive morphology and colour pattern.|
|Red List Category & Criteria:||Data Deficient ver 3.1|
|Assessor(s):||Freyhof, J. & Kottelat, M.|
|Reviewer(s):||Bogutskaya, N., & Smith, K. (IUCN Freshwater Biodiversity Unit)|
The nomenclature of this taxon (see taxonomic notes above) needs to be resolved before it can be properly assessed. The species is therefore listed as Data Deficient even though it may well be Extinct.
|Range Description:||Austria: subalpine lakes in Danube drainage (Attersee, Traunsee, Fuschlersee). The same or similar species were apparently recorded in subalpine lakes in Switzerland (e.g. Vierwaldstätter [Rhine drainage]).|
|Range Map:||Click here to open the map viewer and explore range.|
|Current Population Trend:||Unknown|
|Habitat and Ecology:||
Lacustrine, in deep water. Spawns along shores.
Lacustrine species, not reported to migrate to tributaries. Only caught in May (hence the vernacular name) when it comes in to shallow waters, presumably to spawn. Eggs white, about 2 mm in diameter. Feeds on fishes.
|Conservation Actions:||No information.|
|Citation:||Freyhof, J. & Kottelat, M. 2008. Salmo schiefermuelleri. The IUCN Red List of Threatened Species 2008: e.T135552A4143781. http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T135552A4143781.en . Downloaded on 10 October 2015.|
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