Gymnocephalus schraetser (Linnaeus, 1758)
Gymnocephalus schraetser
photo by Hartl, A.

Family:  Percidae (Perches), subfamily: Percinae
Max. size:  30 cm TL (male/unsexed); max.weight: 250.0 g; max. reported age: 15 years
Environment:  demersal; pH range: 7 - 7.5; dH range: 10 - 15
Distribution:  Europe: Danube drainage. In Appendix III of the Bern Convention (protected fauna).
Diagnosis:  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).
Biology:  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).
IUCN Red List Status: Least Concern (LC); Date assessed: 01 January 2008 Ref. (120744)
Threat to humans:  harmless
Country info:   

Entered by: Froese, Rainer - 02.11.92
Modified by: Luna, Susan M. - 02.06.14
Checked by: Froese, Rainer - 15.04.94

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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