Schelly

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Schelly
Systematics
Cohort : Euteleosteomorpha
Order : Salmonid fish (Salmoniformes)
Family : Salmon fish (Salmonidae)
Subfamily : Coregoninae
Genre : Coregonus
Type : Schelly
Scientific name
Coregonus stigmaticus
Regan , 1908

The Schelly ( Coregonus stigmaticus ), also known as Skelly , is a species of fish from the Coregonus genus . It is limited to a few lakes in the British Lake District and has become rare due to the pursuit of cormorants and water extraction.

features

The Schelly reaches a head-torso-length of 320 mm. Small black spots can be seen on the back and on the flanks. At the terminal mouth, the lower jaw is enclosed by the upper jaw. The snout is cut off vertically. Around the tail stalk there are 22 to 24 rows of scales. The number of gill traps is 34 to 41. There are 10 to 12 1/2 branched anal rays. The number of rows of scales between the lateral line organ and the base of the breast is usually 7 1/2 to 8 1/2,

Occurrence

The Schelly is restricted to the Lake District in Cumbria , England . It occurs in lakes Haweswater , Ullswater , Brotherswater and Red Tarn . Its distribution area is less than 20 km².

Habitat and way of life

The Schelly lives in open waters in inland lakes. The spawning season is from January to February in shallow bays on a stone or gravel bottom. The diet consists of crustaceans and insects.

Danger

In 1992 a cormorant breeding colony formed in the Lake District. The cormorants reproduced so rapidly that they pose a serious threat to the Schelly. Another hazard comes from the falling water level. During a census in the Haweswater Reservoir from 1997 to 2006, between 138 and 472 adult Schellys were counted. The IUCN classifies the Schelly as "endangered" ( endangered ).

Systematics

Although the ichthyologist Charles Tate Regan described the Schelly as a separate species as early as 1908, it is still considered a population of Coregonus lavaretus in the literature on British freshwater fish . In a revision of the Coregons in 1997, Maurice Kottelat took over the systematics from Regan and only used the binomial Coregonus lavaretus for Lavaret, which occurs in France .

literature

  • Maurice Kottelat: European Freshwater fishes. An heuristic checklist of the freshwater fishes of Europe (exclusive of former USSR), with an introduction for non-systematists and comments on nomenclature and conservation . Biologia (Bratislava) Sect. Zool., 52 (Suppl.). 1997.
  • Maurice Kottelat & Jörg Freyhof: Handbook of European Freshwater Fishes . 2007, ISBN 978-2-8399-0298-4 .
  • Charles Tate Regan: The Freshwater Fishes of the British Isles (Original edition from 1908, reprinted in 2008 by Read Books. ISBN 1409764117 )
  • Conservation status assessment for: S2494: Coregonus lavaretus - Whitefish In: Second Report by the United Kingdom under Article 17 on the implementation of the Directive from January 2001 to December 2006 . European Community Directive on the Conservation of Natural Habitats and of Wild Fauna and Flora (92/43 / EEC) PDF full text

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