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Perciformes/Percoidei (Perchs) >
Percidae (Perches) > Percinae
Etymology: Gymnocephalus: Greek, gymnos = naked + Greek, kephale = head (Ref. 45335).
Eponymy: Eugene Kornel Balon (1930–2013) was a Canadian ichthyologist and writer. [...] (Ref. 128868), visit book page.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
; sötvatten bentopelagisk; pH range: 6.8 - 7.8; dH range: 10 - 20. Temperate; 10°C - 20°C (Ref. 12468)
Europe: Danube (from delta to Germany) and Dniepr (from delta to Kiev) drainages; expected in Dniestr.
Storlek / Vikt / Ålder
Könsmognad: Lm ?  range ? - ? cm
Max length : 15.0 cm SL hane/ej könsbestämd; (Ref. 59043)
Kort beskrivning
Bestämningsnycklar | Morfologi | Morfometri
Taggstrålar i ryggfenan (totalt) : 14 - 16. Distinguished uniquely from its congeners by its body depth, 27-30% SL. Differs further from other species of the genus by the combination of the following characters: flank grey with a few large, irregular, dark blotches; and dorsal fin with 14-16 spines (Ref. 59043).
Body shape (shape guide): fusiform / normal.
Inhabits open sandy and muddy bottom in backwaters and large rivers with moderate current. Undertake migration from river mainstreams to backwaters to spawn. Nocturnal, feeding on small invertebrates (Ref. 59043).
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Kottelat, M. and J. Freyhof, 2007. Handbook of European freshwater fishes. Publications Kottelat, Cornol and Freyhof, Berlin. 646 pp. (Ref. 59043)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
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Harmless
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Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00469 - 0.02338), b=3.05 (2.87 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 3.5 ±0.37 se; based on food items.
Resiliens (Ref.
120179): Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (Preliminary K or Fecundity.).
Sårbarhet i fisket (Ref.
59153): Low vulnerability (10 of 100).
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