Map_thumbnail_large_font

Silurus glanis

Status_ne_offStatus_dd_offStatus_lc_onStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA ACTINOPTERYGII SILURIFORMES SILURIDAE

Scientific Name: Silurus glanis
Species Authority: Linnaeus, 1758
Common Name(s):
English Wels Catfish
Synonym(s):
Siluris glanis Linnaeus, 1758 [orth. error]

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2008
Date Assessed: 2008-01-01
Assessor(s): Freyhof, J. & Kottelat, M.
Reviewer(s): Bogutskaya, N., & Smith, K. (IUCN Freshwater Biodiversity Unit)
Justification:
A widespread species with no known major widespread threats. However, the species is locally threatened due to river regulation destruction of shallow spawning sites.

Geographic Range [top]

Range Description: North, Baltic, Black, Caspian and Aral Sea basins, as far north as southern Sweden and Finland; Aegean Sea basin, in Maritza and from Stuma to Sperchios drainages; Turkey. Absent from rest of Mediterranean basin. Introduced in Rhône drainage in 1857 and in British Isles during second half of 19th century. Now widely introduced and translocated throughout Europe and Lake Balkhash basin (Kazakhstan).
Countries:
Native:
Afghanistan; Albania; Armenia (Armenia); Austria; Azerbaijan; Belarus; Belgium; Bosnia and Herzegovina; Bulgaria; China; Croatia; Czech Republic; Denmark; Estonia; Finland; France; Georgia; Germany; Greece; Hungary; Iran, Islamic Republic of; Italy; Kazakhstan; Kyrgyzstan; Latvia; Liechtenstein; Lithuania; Luxembourg; Macedonia, the former Yugoslav Republic of; Moldova; Montenegro; Netherlands; Pakistan; Poland; Romania; Russian Federation; Serbia (Serbia); Slovakia; Slovenia; Sweden; Switzerland; Tajikistan; Turkey; Turkmenistan; Ukraine; Uzbekistan
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Abundant.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: Habitat:
Large and medium size lowland rivers, backwaters and well vegetated lakes. Spawns in shallow, warm and well vegetated riverine habitats without current.

Biology:
Lives up to 80 years in the wild. Spawns for the first time at 2-3 years and 1-2 kg. Spawns in April-June, in northern areas until August, when temperature reaches about 20°C. In spawning grounds, males defend small territories and build nests of plant material, dig shallow depressions or clean spawning substrate such as willow (Salix) roots. Nests are defended by males until larvae emerge. Spawns in pairs. During spawning act, the male embraces the female. Eggs hatch in 2-3 days and larvae remain in nest until yolk sack is absorbed (2-4 days). A nocturnal predator, feeding near bottom and in water column. Very sensitive to extra-aquatic sounds. Head sensory canal system allows to track the wakes [a trail of hydrodynamic and chemical signatures left by a swimming fish] of prey up to 10 seconds old over distances up to 55 times the length of the prey. Larvae and juveniles benthic and negatively phototactic, feeding on a wide variety of invertebrates and fish. Adults feed on fish and other aquatic vertebrates.
Systems: Freshwater

Threats [top]

Major Threat(s): River regulation destroying shallow spawning sites.

Conservation Actions [top]

Conservation Actions: No information.

Citation: Freyhof, J. & Kottelat, M. 2008. Silurus glanis. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 20 August 2014.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please fill in the feedback form so that we can correct or extend the information provided