Salmo rhodanensis

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 rhodanensis

Species Authority:

Fowler, 1974

Common Name/s:

English

–

Rhône Trout

Taxonomic Notes:

The diagnostic four broad bars are present in populations of Dourbie (upper Tarn system, France), which is distinguished by the presence of red spots and dorsal, pelvic and anal with white anterior margin. This is possibly an introgression zone between S. rhodanensis and S. cf. cettii.

Assessment Information [top]

Red List Category & Criteria:	Data Deficient ver 3.1
Year Assessed:	2008
Assessor/s:	Freyhof, J. & Kottelat, M.
Reviewer/s:	Bogutskaya, N., & Smith, K. (IUCN Freshwater Biodiversity Unit)
Justification: The species is a recently recognised species (previously included under S. trutta) known from the Rhone drainage. The population of true S. rhodanensis is unknown as several populations include a significant proportion of hybrids with S. trutta produced in aquaculture and stocked (for over 100 years). Work to determine the level of hybridisation is needed.

Geographic Range [top]

Range Description:	Rhône drainage, except Lake Geneva basin (France, Switzerland). Apparently eastward to Roia drainages (France, Italy), possibly further eastward in Ligurian Sea basin.
Countries:	Native: France; Italy; Monaco; Switzerland
Range Map:	(click map to view full version)

Population [top]

Population:	Fragmented and locally abundant.
Population Trend:	Unknown

Habitat and Ecology [top]

Habitat and Ecology:	Habitat: Rivers and streams, in clear, cold, well oxygenated water, with slow to fast current. Biology: Resident ecotype only. Spawns for the first time at four years. Spawns in late December, at temperatures about 4°C, on gravel or coarse sand. Feeds on invertebrates, fish, amphibians.
Systems:	Freshwater

Threats [top]

Major Threat(s):	Hybridisation with S. trutta.

Major Threat(s):

Hybridisation with S. trutta.

Conservation Actions [top]

Conservation Actions:	No information.

Conservation Actions:

No information.

Bibliography [top]

	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. Mezzera, M., Largiader, C.R. and Scholl, A. 1997. Discrimination of native and introduced brown trout in the River Doubs (Rhône drainage) by number and shape of parr marks.

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.

Mezzera, M., Largiader, C.R. and Scholl, A. 1997. Discrimination of native and introduced brown trout in the River Doubs (Rhône drainage) by number and shape of parr marks.

Citation:	Freyhof, J. & Kottelat, M. 2008. Salmo rhodanensis. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 09 February 2012.
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