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The huchen is endemic to the Danube basin in Europe where the remaining population is threatened primarily by river damming, resulting in habitat fragmentation and loss through river impoundment and disruption of the longitudinal continuity of rivers, cutting away fish from its spawning grounds, with overfishing and fisheries mismanagement as an additional issue in many areas.
Vimba elongata is a European freshwater fish species in the family Cyprinidae. Inhabits the basin of upper Danube : alpian lakes of upper Austria and southern Bavaria . References
The possibility of building a human-made fish pass enabling migration for fish species including the sturgeon, is currently under review by projects such as We Pass. [57] The Upper Danube ecoregion alone has about 60 fish species and the Lower Danube–Dniester ecoregion has about twice as many. [58]
Gymnocephalus ambriaelacus is a species of freshwater ray-finned fish, a ruffe, from the family Percidae which is endemic to Lake Ammersee, in the upper Danube basin in southern Germany. This species can reach a maximum length of 11.7 centimetres (4.6 in) . [2]
The sterlet (Acipenser ruthenus in Linnaeus' classification) is the last of the five native sturgeon species inhabiting the Middle and Upper Danube River. Its population has dropped significantly, mainly due to the degradation of main habitats, spawning grounds and foraging grounds.
In the Upper Danube it was registered in Austrian and German parts up to the City of Straubing. [7] [8] During 2000–2002 рр. this species was registered in small streams of the Black Sea coast of Eastern Turkey [9] Since March 2009 the fish is registered in the North Sea basin, in the Waal River, the Netherlands. [10]
The Russian sturgeon (Acipenser gueldenstaedtii), also known as the diamond sturgeon or Danube sturgeon, is a species of fish in the family Acipenseridae. It is found in Azerbaijan, Bulgaria, Georgia, Iran, Kazakhstan, Romania, Russia, Turkey, Turkmenistan, and Ukraine. It is also found in the Caspian Sea. This fish can grow up to about 235 cm ...
The Danube gudgeon grows to a maximum length of 15 centimetres (5.9 in), though a more normal size is 10 to 12 centimetres (3.9 to 4.7 in). It has a distinctive pair of barbels at the corner of the mouth which are long enough to extend back to beyond the eyes. These are tactile organs and are used to search through sediment for edible items. [4]