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Schraetzer (Gymnocephalus schraetser) fish species and information / pictures of Schraetzer - Gymnocephalus schraetser

Schraetzer (Gymnocephalus schraetser) fish species information

Scientific Name
Gymnocephalus schraetser

Common Name
Schraetzer

Biology
Occurs in groups in open sand and mud bottom of large rivers with moderate current. Larvae are benthic. Usually crepuscular but feeds also at daytime. Nocturnal, feeding on small invertebrates, especially molluscs (Ref. 59043).

Classification

Classified By

Linnaeus, 1758

Class

Ray-finned fishes (Actinopterygii)

Order

Perch-like fish (Perciformes)

Family

Perches (Percidae)

Distribution

Region

Europe

Distribution

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

Range

49°N - 43°N, 8°E - 30°E

Environment

Climate

Temperate

Water Temperature From

4 °C

Water Temperature To

18 °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

demersal

Environment

Freshwater; ; pH range: 7.0 - 7.5; dH range: 10 - 15 demersal

Trophic Level

3.39 s.e. 0.43 Based on food items.

Occurs in Marine / Salt water

False

Occurs in Brackish water

False

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

30.0 cm

Common Length

15.0 cm

Phylogenetic Diversity Index

PD50 = 0.5312 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

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

Vulnerability

Low to moderate vulnerability (31 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Least Concern (LC)