Salmo schiefermuelleri

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Bibliography

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	ACTINOPTERYGII	SALMONIFORMES	SALMONIDAE

Scientific Name:

Salmo schiefermuelleri

Species Authority:

Bloch, 1784

Common Name/s:

English

–

Mayforelle, May Trout

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.

Assessment Information [top]

Red List Category & Criteria:	Data Deficient ver 3.1
Year Published:	2008
Assessor/s:	Freyhof, J. & Kottelat, M.
Reviewer/s:	Bogutskaya, N., & Smith, K. (IUCN Freshwater Biodiversity Unit)
Justification: 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.

Geographic Range [top]

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]).
Countries:	Native: Austria Presence uncertain: Switzerland
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	No information.
Population Trend:	Unknown

Habitat and Ecology [top]

Habitat and Ecology:	Habitat: Lacustrine, in deep water. Spawns along shores. Biology: 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.
Systems:	Freshwater

Threats [top]

Major Threat(s):	Unknown

Major Threat(s):

Unknown

Conservation Actions [top]

Conservation Actions:	No information.

Conservation Actions:

No information.

Bibliography [top]

	Heckel, J.J. 1851. Bericht einer auf Kosten der kais. Akademie der Wissenschaften durch Oberösterreich nach Salzburg, München, Innsbruck, Botzen, Verona, Padua, Vene dig und Triest unternommenen Reise. Heckel, J.J. and Kner, R. 1858. Die Süsswasserfische der Österreichischen Monarchie mit Rücksicht auf der angrenzenden Länder. Engelmann, Leipzig. IUCN. 2008. 2008 IUCN Red List of Threatened Species. Available at: http://www.iucnredlist.org. (Accessed: 5 October 2008). Kottelat, M. 1997. European freshwater fishes. An heuristic checklist of the freshwater fishes of Europe (exclusive of former USSR), with an introduction for non-sys tematists and comments on nomenclature and conservation. Kottelat, M. and Freyhof, J. 2007. Handbook of European Freshwater Fishes. Publications Kottelat, Cornol, Switzerland. Kottelat, M. and Freyhof, J. 2007. Notes on the taxonomy and nomenclature of some European fishes. in press. Steinmann, P. 1944. Probleme der Systematik unserer einheimischen Forelle.

Heckel, J.J. 1851. Bericht einer auf Kosten der kais. Akademie der Wissenschaften durch Oberösterreich nach Salzburg, München, Innsbruck, Botzen, Verona, Padua, Vene dig und Triest unternommenen Reise.

Heckel, J.J. and Kner, R. 1858. Die Süsswasserfische der Österreichischen Monarchie mit Rücksicht auf der angrenzenden Länder. Engelmann, Leipzig.

IUCN. 2008. 2008 IUCN Red List of Threatened Species. Available at: http://www.iucnredlist.org. (Accessed: 5 October 2008).

Kottelat, M. 1997. European freshwater fishes. An heuristic checklist of the freshwater fishes of Europe (exclusive of former USSR), with an introduction for non-sys tematists and comments on nomenclature and conservation.

Kottelat, M. and Freyhof, J. 2007. Handbook of European Freshwater Fishes. Publications Kottelat, Cornol, Switzerland.

Kottelat, M. and Freyhof, J. 2007. Notes on the taxonomy and nomenclature of some European fishes. in press.

Steinmann, P. 1944. Probleme der Systematik unserer einheimischen Forelle.

Citation:	Freyhof, J. & Kottelat, M. 2008. Salmo schiefermuelleri. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 23 May 2012.
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