Overview

Comprehensive Description

Biology

Inhabits streams in hilly areas, with clear, flowing and well oxygenated water (as a result of continuous stocking, often present in unsuitable habitats). Also occurs in alpine and subalpine lakes. Feeds on aquatic insects and invertebrates. Large individuals also prey on fishes. Moves to smaller tributaries to spawn on gravel. Attains a maximum size of up to about 80 cm SL and lives up to at least 8 years. Introduced and has hybridized with Salmo marmoratus (Ref. 59043).
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Distribution

Europe: Po to Soca drainages (where it is possibly introduced) and northern slope of Apennine range (Italy, Switzerland, Slovenia). The western and eastern distributional limits are not clear.
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Italy, Switzerland and Slovinia.
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Physical Description

Size

Max. size

80.0 cm SL (male/unsexed; (Ref. 59043)); max. reported age: 8 years (Ref. 59043)
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Diagnostic Description

Distinguished from congeners in Apennine Peninsula by the combination of the following characters: parr marks absent in adults and subadults (over about 10 cm SL); parr marks vertically elongated; caudal fin slightly emarginate; body pattern not marbled; red spots not restricted to lateral line; black or dark brown spots present. This diagnosis is tentative as genetic data indicate that Salmo cenerinus represents a lineage very different from those of Atlantic and Black Sea basins, but there is no published morphological comparison. Salmo trutta has probably hybridized with most native populations (Ref. 59043).
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Ecology

Habitat

Environment

benthopelagic; freshwater
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Conservation

Threats

Not Evaluated
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Wikipedia

Salmo cenerinus

Salmo cenerinus is a species of fish from the family of Salmonidae, in northern Italy from the Po to the Isonzo and on the northern slope of the Apennines. The species was introduced to different waters outside their original distribution area, to which may also include the Isonzo area. In various places it has probably hybridized with introduced trout (Salmo trutta).

Description[edit]

Salmo cenerinus in lakes grows to 80 centimeters and in rivers to only 40 centimeters body length. Black and dark brown, and red spots are present all over the body. The caudal fin is slightly indented.

Lifecycle[edit]

The species colonized clear, fast-flowing and well-aerated streams in the hill country, and subalpine and alpine lakes, with two different morphs occur ("trout" and "lake trout"). As a food serve aquatic insects and other invertebrates, large individuals also prey on fish. The spawning period is dependent on altitude and temperature and is from November to February. Eggs are laid in smaller tributaries on gravel base. Males become sexually mature at two, with females three years, the maximum age is at least eight years.[1]

References[edit]

  1. ^ Maurice Kottelat; Jörg Freyhof (2007). Handbook of European freshwater fishes. Publications Kottelat. ISBN 978-2-8399-0298-4. 
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