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Huchen
The huchen (Hucho hucho) (/ˈhuːxən/, from German), also known as Danube salmon or redfish (German: Rotfisch), is a large species of freshwater fish in the family Salmonidae native to the Danube basin in Central and Eastern Europe. It is the type species of genus Hucho (a.k.a. the taimens), being closely related (in the same subfamily) to salmon, trout, char and lenoks.
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. Damming and all these other problems are especially visible in the Balkans.
The upper reaches of the Danube basin, rivers and tributaries contain almost all of the recent population. This includes:
In the Balkans huchen still appears in following river systems:
Some of these habitats, especially in the Balkans, are endangered with planned, or already implemented plans for construction of new dams and hydroelectric power plants, such as on the Lim in Serbia, or like in case of the river Piva in Montenegro and Bosnia and Herzegovina, whose respective populations were completely wiped out since mid 20th century.
In some cases rehabilitation of parts of the habitat is attempted, through restoration of the river course. Such positive example is the part of the course of the river Inn, with some 30 km (19 mi)-long stretch around the Bavarian town of Mühldorf was rebuilt and renaturalized and the huchen has returned in recent years.
It has been introduced to other major river basins elsewhere on the continent and even North Africa, to rivers in Morocco, but these populations are not self-sustaining. Some evidence suggest that in historic times the huchen has also been found in the neighboring Dniester basin.[citation needed] Huchen sometimes successfully establish in accessible natural lakes, like glacial Lake Plav which is the source of the Lim river in Montenegro, one of the major huchen habitats in the Balkans. However, the species sometimes survives even when cut off from the rest of the population in big dam reservoirs on mountain rivers, such as reservoirs on the Drina in Bosnia, or Lake Czorsztyn in Poland, as long as competitive and/or allochthonous predator species are not introduced into the newly created lakes.
The huchen reaches about 1.5 m (4 ft 11 in) in length and more than 50 kg (110 lb) in weight. The average length is between 60 and 120 centimetres (24 and 47 in). The huchen has a slender body that is nearly round in cross-section. On the reddish brown back are several dark patches in an X or crescent shape, but most distinctive feature is its head, which is larger than in other salmonides (longer and wider), with large elongated mouth.
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Huchen AI simulator
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Huchen
The huchen (Hucho hucho) (/ˈhuːxən/, from German), also known as Danube salmon or redfish (German: Rotfisch), is a large species of freshwater fish in the family Salmonidae native to the Danube basin in Central and Eastern Europe. It is the type species of genus Hucho (a.k.a. the taimens), being closely related (in the same subfamily) to salmon, trout, char and lenoks.
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. Damming and all these other problems are especially visible in the Balkans.
The upper reaches of the Danube basin, rivers and tributaries contain almost all of the recent population. This includes:
In the Balkans huchen still appears in following river systems:
Some of these habitats, especially in the Balkans, are endangered with planned, or already implemented plans for construction of new dams and hydroelectric power plants, such as on the Lim in Serbia, or like in case of the river Piva in Montenegro and Bosnia and Herzegovina, whose respective populations were completely wiped out since mid 20th century.
In some cases rehabilitation of parts of the habitat is attempted, through restoration of the river course. Such positive example is the part of the course of the river Inn, with some 30 km (19 mi)-long stretch around the Bavarian town of Mühldorf was rebuilt and renaturalized and the huchen has returned in recent years.
It has been introduced to other major river basins elsewhere on the continent and even North Africa, to rivers in Morocco, but these populations are not self-sustaining. Some evidence suggest that in historic times the huchen has also been found in the neighboring Dniester basin.[citation needed] Huchen sometimes successfully establish in accessible natural lakes, like glacial Lake Plav which is the source of the Lim river in Montenegro, one of the major huchen habitats in the Balkans. However, the species sometimes survives even when cut off from the rest of the population in big dam reservoirs on mountain rivers, such as reservoirs on the Drina in Bosnia, or Lake Czorsztyn in Poland, as long as competitive and/or allochthonous predator species are not introduced into the newly created lakes.
The huchen reaches about 1.5 m (4 ft 11 in) in length and more than 50 kg (110 lb) in weight. The average length is between 60 and 120 centimetres (24 and 47 in). The huchen has a slender body that is nearly round in cross-section. On the reddish brown back are several dark patches in an X or crescent shape, but most distinctive feature is its head, which is larger than in other salmonides (longer and wider), with large elongated mouth.