Kessler's gudgeon

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Kessler's gudgeon
Romanogobio kesslerii Homoki küllő.jpg

Kessler's gudgeon ( Romanogobio kesslerii )

Systematics
without rank: Otophysa
Order : Carp-like (Cypriniformes)
Subordination : Carp fish-like (Cyprinoidei)
Family : Gudgeon relatives (Gobionidae)
Genre : Romanogobio
Type : Kessler's gudgeon
Scientific name
Romanogobio kesslerii
( Dybowski , 1862)

Kessler's gudgeon ( Romanogobio kesslerii ) is a small freshwater fish from the family of gudgeon relatives (Gobionidae) that occurs in Eastern Europe in the river basin of the Dniester , the lower and central Danube and the upper Vistula .

features

Kessler's gudgeon becomes about 10 to 12, at most up to 15 cm long. The body height is 14 to 21% of the standard length . Like all gudgeons, it has an elongated body that is covered by relatively large scales. The head is long, the snout pointed, the mouth below. On the back of the upper jaw there is a long barb that extends back to the back of the eyes. The pharyngeal teeth are in two rows: inner row 5 teeth, outer row 3, less often 2 teeth (pharynx formula: ((2) 3.5-5.3 (2))). The eye diameter is 20 to 28% of the head length. The back is blackish-gray in color, the sides of the body light with a few large, indistinct spots along the side line, and the abdomen is whitish. One to three rows of small dark spots can be found on the dorsal and caudal fin.

Way of life

Kessler's gudgeon lives in fast flowing rivers and streams ( grayling and trout regions ) with sandy subsoil, is sociable and active during the day. It feeds on various bottom-dwelling and floating invertebrates (worms, insect larvae, crustaceans) and algae. The spawning season lasts from April to June. Males develop a mild spawning rash . The eggs are laid in shallow, flowing water between stones or plants. It is very sensitive to polluted water.

Systematics

Within the carp fish, Kessler's gudgeon belongs to the subfamily of gudgeon relatives (Gobioninae) and to the genus Romanogobio , to which Eastern European and Asian gudgeon species belong. A gudgeon population found in Romanian waters, formerly known as the subspecies R. k. banaticus is now considered a separate species ( Romanogobio banaticus ).

literature

  • Fritz Terofal: Steinbach's natural guide, freshwater fish. Ulmer, Stuttgart 2003, ISBN 3-80014-296-1

Web links