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Hucho hucho  (Linnaeus, 1758)

Huchen
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Hucho hucho
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Slovakia country information

Common names: Hlavátka obycajná
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: In Turiec River, a huchen reserve measuring 21 km has existed since 1961. Also Ref. 26170. Status of threat: critically endangered (Ref. 90058).
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/lo.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Hol?ik, J., 1996
National Database:

Classification / Names

Actinopterygii (ray-finned fishes) > Salmoniformes (Salmons) > Salmonidae (Salmonids) > Salmoninae
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Main reference

Size / Weight / Age

Max length : 150 cm TL male/unsexed; (Ref. 11243); common length : 70.0 cm TL male/unsexed; (Ref. 682); max. published weight: 52.0 kg (Ref. 719); max. reported age: 20 years (Ref. 59043)

Length at first maturity
Lm ?  range ? - ? cm

Environment

Freshwater; benthopelagic; potamodromous (Ref. 59043)

Climate / Range

Temperate; 6°C - 18°C (Ref. 2059), preferred ?; 50°N - 44°N, 8°E - 21°E

Distribution

Europe: Danube drainage. Introduced into other European river basins when their numbers declined due to ecological changes in the Danube. Appendix III of the Bern Convention (protected fauna).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 3 - 5; Dorsal soft rays (total): 8-14; Anal spines: 3-5; Anal soft rays: 7 - 14; Vertebrae: 66 - 72. Distinguished from other species of Salmonidae in central and eastern Europe by the following combination of characters: lateral line with 180-200 scales; no red spots and white fin margins; head dorsally flattened and long ( 22-24% SL); body roundish; caudal fin deeply emarginate; large size (in undisturbed areas); usually 13-19 gill rakers (Ref. 59043).

Biology     Glossary (e.g. epibenthic)

Usually solitary, inhabits deeper regions of swift flowing streams with oxygen rich waters. Adults are territorial but not solitary (Ref. 26170). Carnivore. Juveniles feed mainly on invertebrates and adults mostly on fishes, but also prey on amphibians, reptiles, small mammals and waterfowl (Ref. 26170). Important sport fish with minimum size of catch from 50-55 cm. Transplantations of young artificially incubated and reared fish have not been successful. Depletion of stocks due to overexploitation, industrial pollution, waterway redirection and badly designed or non-existent fish ladders in dams and reservoirs. Territorial, but migrates short distances upstream for spawning (Ref. 556). Reported to be one of the biggest freshwater fishes of the world, reaching a length of over 2 m and weight of over 100 kg (Ref. 26170); which is probably erroneous (A. Mangold, pers. comm.).

IUCN Red List Status (Ref. 115185)

  Endangered (EN) (B2ab(ii,iii))

Threat to humans

  Harmless



Human uses

Fisheries: commercial; aquaculture: commercial; gamefish: yes

More information

Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
Recruitment
Abundance
References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion
Collaborators
Pictures
Stamps, Coins
Sounds
Ciguatera
Speed
Swim. type
Gill area
Otoliths
Brains
Vision

Tools

Special reports

Download XML

Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD50 = 0.5625 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
4.2   ±0.74 se; Based on food items.

Resilience (Ref. 69278)
Low, minimum population doubling time 4.5 - 14 years (tm=5; tmax=20)

Vulnerability (Ref. 59153)
Very high vulnerability (77 of 100)
Price category (Ref. 80766)
Very high