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Gymnocephalus schraetser (Linnaeus, 1758)

Schraetzer
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Gymnocephalus schraetser
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Classification / Names Nombres comunes | Sinónimos | Catalog of Fishes(Género, Especie) | ITIS | CoL | WoRMS | Cloffa

> Perciformes/Percoidei (Perchs) > Percidae (Perches) > Percinae
Etymology: Gymnocephalus: Greek, gymnos = naked + Greek, kephale = head (Ref. 45335).
More on author: Linnaeus.

Environment: milieu / climate zone / depth range / distribution range Ecología

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

Distribución Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri

Europe: Danube drainage.

Length at first maturity / Tamaño / Peso / Age

Maturity: Lm 14.0, range 12 - 16 cm
Max length : 30.0 cm TL macho / no sexado; (Ref. 556); common length : 15.0 cm TL macho / no sexado; (Ref. 556); peso máximo publicado: 250.00 g (Ref. 556); edad máxima reportada: 15 años (Ref. 59043)

Short description Claves de identificación | Morfología | Morfometría

Espinas dorsales (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).

Biología     Glosario (por ej. epibenthic)

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 Maturities | Reproducción | Spawnings | Egg(s) | Fecundities | Larva

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

Main reference Upload your references | Referencias | Coordinador | Colaboradores

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. 130435)

  Least Concern (LC) ; Date assessed: 01 January 2008

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Pesquerías: sin interés; pesca deportiva: si; carnada: usually
FAO - Publication: search | FishSource |

Más información

Trophic ecology
componentes alimenticios
Diet compositions
Food consumptions
Food rations
Despredadores
Ecology
Ecología
Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversions
Recruitments
Abundances
Life cycle
Reproducción
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
Larva
Dinámica larvaria
Distribution
Países
Áreas FAO
Ecosistemas
Ocurrencias, apariciones
Introducciones
BRUVS - Videos
Anatomy
Gill areas
Cerebros
Otolitos
Physiology
Body compositions
Nutrients
Oxygen consumptions
Tipo de natación
Swimming speeds
Visual pigment(s)
Sonidos de peces
Diseases / Parasites
Toxicities (LC50s)
Genetics
Genética
Electrophoreses
Heritabilities
Human related
Aquaculture systems
Perfiles de acuicultura
Razas
Ciguatera cases
Stamps, coins, misc.
Outreach
Colaboradores
Taxonomy
Nombres comunes
Sinónimos
Morfología
Morfometría
Imágenes
References
Referencias

Herramientas

Bio-Quiz | E-book | Guía de campo | Asistente para frecuencias de tallas | Herramienta de ciclo de vida | Mapa de puntos | Classification Tree | Catch-MSY |

Special reports

Check for Aquarium maintenance | Check for Species Fact Sheets | Check for Aquaculture Fact Sheets

Download XML

Summary page | Datos específicos | Nombres comunes | Photos

Fuentes de Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Género, Especie | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Bases de datos nacionales | Otolith Atlas of Taiwan Fishes | Acuarios públicos | PubMed | Reef Life Survey | Socotra Atlas | Árbol de la vida | Wikipedia: Go, búsqueda | World Records Freshwater Fishing | Expediente Zoológico

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5312   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01072 (0.00476 - 0.02414), b=3.05 (2.86 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Nivel trófico (Ref. 69278):  3.4   ±0.43 se; based on food items.
Generation time: 5.5 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
Resiliencia (Ref. 120179):  Bajo, población duplicada en un tiempo mínimo de 4.5-14 años (tm=2-3; tmax=15).
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (42 of 100).