Lau (fish)
Lukewarm | ||||||||||||
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Lau ( Protochondrostoma genei ) |
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Systematics | ||||||||||||
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Scientific name of the genus | ||||||||||||
Protochondrostoma | ||||||||||||
Robalo , Almada , Levy & Doadrio , 2007 | ||||||||||||
Scientific name of the species | ||||||||||||
Protochondrostoma genei | ||||||||||||
( Bonaparte , 1839) |
The lau ( Protochondrostoma genei ) is a European freshwater fish found in northern Italy and Slovenia in the rivers Vomano , Tronto , Esino , Cesano , Metauro , Foglia , Po , Adige , Brenta , Piave , Livenza , Tagliamento and Isonzo . Reports of occurrences in the Upper Rhine , Upper Danube and Inn are uncertain and poorly documented.
features
The lau resembles the nose . In most cases, it becomes 15 to 20 cm long and can reach a maximum length of 30 cm. Its body is elongated and only slightly flattened on the sides. The body height is 20 to 27% of the standard length . The back is light and greenish gray, the sides of the body and the belly silvery, the fins yellowish white, their edges reddish. Above the sideline , a dark longitudinal band extends from the rear edge of the gill cover to the tail fin root. The mouth is slightly below, the narrow lower lip keratinized. On the pharyngealia there is a row of teeth with five, very rarely six teeth.
- Fin formula : dorsal 11, anal 11–12.
- Scale formula : SL 50–62.
- Gill trap rays : 14–19.
Way of life
The way of life of the Lau has hardly been researched. It lives socially and close to the ground in the barbel region of larger and medium-sized, oxygen-rich rivers with gravel and scree bottoms and feeds mainly on small invertebrates, as well as algae. The breeding season extends from March to June.
literature
- Anton Lelek: The Freshwater Fishes of Europe, Volume 9, Threatened Fishes of Europe. Aula-Verlag, Wiesbaden, ISBN 3-89104-048-2
- Uwe Hartmann: freshwater fish. Recognize & determine (= Steinbach's natural guide ). 2nd, unchanged edition. Ulmer, Stuttgart 2003, ISBN 3-8001-4296-1 .
Web links
- Lau (fish) on Fishbase.org (English)
- Protochondrostoma genei in the endangered Red List species the IUCN 2006. Posted by: Crivelli, AJ, 2006. Accessed December 24, 2011th