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Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Percidae (Perches) > Percinae
Etymology: Gymnocephalus: Greek, gymnos = naked + Greek, kephale = head (Ref. 45335).

Environment / Climate / Range Ecology

Freshwater; demersal; pH range: 7.0 - 7.5; dH range: 10 - 15. Temperate; 4°C - 18°C (Ref. 2059), preferred ?; 49°N - 43°N, 8°E - 30°E

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Europe: Danube drainage. In Appendix III of the Bern Convention (protected fauna).

Length at first maturity / Size / Weight / Age

Maturity: L_m ?, range 12 - 16 cm
Max length : 30.0 cm TL male/unsexed; (Ref. 556); common length : 15.0 cm TL male/unsexed; (Ref. 556); max. published weight: 250.00 g (Ref. 556); max. reported age: 15 years (Ref. 59043)

Short description Morphology | Morphometrics

Dorsal spines (total): 17 - 19. Distinguished from its congeners by having unique characters of 3 discontinuous dark stripes along flank and 55-62 + 4-5 scales along lateral line. Differs further from other species of the genus by having 17-19 dorsal spines (Ref. 59043).

Adults occur in groups in open sand and mud bottom of large rivers with moderate current. Nocturnal, feeding on small invertebrates, especially molluscs, usually crepuscular but may also feed at daytime. Larvae are benthic (Ref. 59043).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Eggs are attached to stones by females (Ref. 59043).

Main reference Upload your references | References | Coordinator | Collaborators

Kottelat, M. and J. Freyhof, 2007. Handbook of European freshwater fishes. Publications Kottelat, Cornol and Freyhof, Berlin. 646 pp. (Ref. 59043)

IUCN Red List Status (Ref. 115185)

Least Concern (LC)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: of no interest; gamefish: yes; bait: usually

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Internet sources

Gymnocephalus schraetser (Linnaeus, 1758)