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Gymnocephalus baloni, commonly known as Balon's Ruffe, is a small freshwater fish belonging to the family Percidae. It is characterized by its elongated body, distinctive coloration, and a continuous dorsal fin. This species is endemic to the Danube River basin and is often found in slow-moving or stagnant waters with abundant vegetation.
Fyysiset ominaisuudet
- Ruumiinmuoto
- elongated
- Väritys
- Dorsal side is typically olive-brown to grayish-brown, fading to yellowish-white on the ventral side. Flanks often have irregular dark spots or blotches. Fins are usually translucent with faint dark speckles.
- Suomutyyppi
- ctenoid
- Suun asento
- terminal
- Erottuvat piirteet
- Continuous dorsal fin with 11-14 strong, sharp spines in the anterior part and 11-13 soft rays in the posterior part., Large, prominent eyes., Two distinct rows of sensory pores on the head., Absence of scales on the operculum (gill cover).
- Selkäevä
- Single, continuous dorsal fin with a spiny anterior portion and a soft-rayed posterior portion. The spiny part is significantly higher than the soft-rayed part.
- Pyrstöevä
- Slightly emarginate to truncate caudal fin.
- Rintaevä
- Well-developed pectoral fins, typically rounded.
- Erottuvat evät
- Pelvic fins are thoracic, located directly below the pectoral fins.
Tunnistusvinkit
Dorsal Fin
Observe the single, continuous dorsal fin. The spiny anterior part is noticeably higher than the soft-rayed posterior part, a key differentiator from other ruffe species.
Head Pores
Look for two distinct rows of sensory pores on the head, which are more pronounced than in Gymnocephalus cernua.
Operculum
Note the absence of scales on the operculum (gill cover), a characteristic feature of this species.
Body Shape and Coloration
Its elongated body and olive-brown to grayish-brown coloration with irregular dark spots are also good indicators.
Elinympäristö
- Vesityyppi
- freshwater
- Syvyys
- Typically found in shallow to moderately deep waters, usually less than 5 meters.
- Ympäristö
- Prefers slow-flowing or stagnant sections of rivers, oxbow lakes, backwaters, and canals. Often associated with dense aquatic vegetation, submerged roots, and muddy or sandy substrates. Tolerates a wide range of turbidity.
- Maantieteellinen levinneisyys
- Endemic to the Danube River basin, including its tributaries and associated floodplains. Its distribution extends from Germany and Austria downstream through Central and Eastern Europe to the Black Sea.
Akvaariotiedot
- Hoitotaso: expert
- Luonne: peaceful
- Ruokavalio: carnivore
- Akvaarion vähimmäiskoko: 100 liters
- Lämpötila: 18-22°C
- pH-taso: 7.0-8.0
- Kovuus: 10-20 dGH
- Yhteensopivuus: Best kept in a species-specific tank or with other peaceful, similarly sized coldwater fish. Avoid aggressive or fin-nipping species.
- Erityisvaatimukset: Requires a well-filtered tank with good water circulation and plenty of hiding spots among plants and driftwood. Substrate should be fine sand or gravel. Sensitive to poor water quality.
Tietoa luonnonvaraisista
- Suojelustatus: least concern
- Kausivaihtelu: Spawns in spring (April-May) when water temperatures rise. More active during warmer months.
- Markkinahinta: N/A
- Kaupallinen merkitys: none
- Maku: Mild, slightly earthy
- Rakenne: Flaky, delicate
- Valmistustavat: Pan-fried, Baked, Stewed
- Ravintoarvo: Low in fat, good source of protein.
Avaintiedot
Endemic to Danubeinteresting
Gymnocephalus baloni is exclusively found within the vast Danube River basin, making it a unique regional species.
Spiny Defensebehavior
Its prominent, sharp dorsal fin spines serve as a primary defense mechanism against predators.
Habitat Specialistbehavior
This species shows a strong preference for slow-moving or stagnant waters with dense aquatic vegetation, indicating a specialized ecological niche.
Taxonomic Distinctionevolution
It was only recognized as a distinct species in 1974 by Holčík and Hensel, having previously been confused with the common ruffe (Gymnocephalus cernua).
Turvallisuustiedot
Käsittele varoen- Turvallisuustaso: caution
- Myrkyllinen: Ei
- Syötävyys: edible
- Käsittelyohjeet: While not venomous, the dorsal fin spines are sharp and can inflict painful punctures. Handle with care, preferably using gloves or a wet cloth to avoid injury to both handler and fish. Return to water quickly if caught.
Samankaltaiset lajit
Ruffe
Gymnocephalus cernua
G. cernua has a less pronounced height difference between the spiny and soft-rayed parts of the dorsal fin. Its head pores are less distinct, and it typically has scales on the operculum. G. cernua also has a wider distribution across Europe and Asia.
Donets Ruffe
Gymnocephalus acerina
G. acerina has a more elongated and slender body, and its dorsal fin spines are generally shorter. Its distribution is restricted to the Don and Dnieper river basins.
Schraetzer
Gymnocephalus schraetser
G. schraetser has a much more elongated and cylindrical body, with distinct dark longitudinal stripes along its flanks. Its dorsal fin is also continuous but has a different profile. It prefers faster-flowing waters.
Tieteellinen luokitus
- Kunta
- Animalia
- Pääjakso
- Chordata
- Luokka
- Actinopterygii
- Lahko
- Perciformes
- Heimo
- Percidae
- Suku
- Gymnocephalus
- Laji
- Gymnocephalus baloni
Tutustu lajiin Balon's Ruffe
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