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Labeo rohita, commonly known as Rohu, is a large, commercially important freshwater cyprinid fish native to the rivers of South Asia. It is a major component of polyculture systems in aquaculture due to its rapid growth rate and herbivorous feeding habits. Rohu is highly valued for its culinary qualities and is a staple food fish in many parts of its native range.
Füüsilised omadused
- Keha kuju
- elongated
- Värvus
- Dorsal side is dark bluish-grey, fading to silvery-white on the belly. Fins are often reddish, especially the pectoral and pelvic fins. Scales are large and prominent.
- Soomuse tüüp
- cycloid
- Suu asend
- subterminal
- Eristuvad tunnused
- Subterminal mouth with thick, fringed lips and no barbels., Absence of barbels distinguishes it from many other Labeo species., Large, cycloid scales., Deeply forked caudal fin.
- Seljauim
- Single, long dorsal fin with 12-14 branched rays. Originates anterior to the pelvic fins.
- Sabauim
- Deeply forked caudal fin with pointed lobes.
- Rinnauim
- Pectoral fins are relatively long, reaching the pelvic fin origin.
- Eristuvad uimed
- Anal fin short, with 5 branched rays. Pelvic fins are abdominal.
Tuvastusnõuanded
Mouth
Observe the subterminal mouth with thick, fringed lips and the complete absence of barbels. This is a key differentiator from other Labeo species.
Coloration
Note the distinct dark bluish-grey dorsal coloration transitioning to silvery-white ventrally, often with reddish fins.
Dorsal Fin
Count the branched rays in the dorsal fin (typically 12-14) and observe its origin anterior to the pelvic fins.
Body Shape
The elongated, fusiform body with a slightly arched dorsal profile is characteristic.
Elupaik
- Vee tüüp
- freshwater
- Sügavus
- Typically found in surface and column waters of rivers, lakes, and reservoirs. Juveniles may inhabit shallower areas.
- Keskkond
- Large rivers, floodplains, natural lakes, and man-made reservoirs. Prefers clear, well-oxygenated waters with moderate currents. Often found in areas with submerged vegetation and muddy or sandy bottoms.
- Geograafiline levik
- Native to the river systems of South Asia, including India, Bangladesh, Nepal, Pakistan, and Myanmar. Widely introduced for aquaculture in other parts of Asia and beyond.
Akvaariumi teave
- Hooldustase: advanced
- Temperament: peaceful
- Toitumine: herbivore
- Minimaalne paagi suurus: 500 gallons (for juveniles, adults require pond systems)
- Temperatuur: 20-32°C (68-90°F)
- pH tase: 6.5-8.0
- Karedus: 5-15 dGH
- Ühilduvus: Generally peaceful with other large, non-aggressive fish. Not suitable for typical home aquariums due to its large adult size.
- Erinõuded: Requires very large, well-filtered systems with ample swimming space. Primarily a pond fish for aquaculture or very large public aquariums. Sensitive to poor water quality.
Looduslik teave
- Kaitsestaatus: least concern
- Hooajalisus: Breeds during the monsoon season (June-September) in natural riverine environments. Available year-round through aquaculture.
- Turuhind: Varies significantly by region and size, generally moderate to high.
- Kaubanduslik tähtsus: high
- Maitse: Mild, sweet, and earthy flavor.
- Tekstuur: Flaky, firm, and white flesh with a moderate fat content.
- Valmistamisviisid: Frying, Currying, Grilling, Steaming, Baking
- Toiteväärtus: Good source of protein, omega-3 fatty acids, and essential vitamins and minerals.
Põhifaktid
Aquaculture Stapleinteresting
Rohu is one of the most important and widely cultured freshwater fish species in South Asia, forming a significant part of the 'Indian Major Carps' polyculture system.
Herbivorous Dietbehavior
As an adult, Rohu is primarily a column feeder, consuming phytoplankton, zooplankton, and decaying vegetation, making it an efficient converter of plant matter into protein.
No Barbelsinteresting
A key distinguishing feature of Labeo rohita from many other Labeo species and carps is the complete absence of barbels around its mouth.
Rapid Growthbehavior
Under optimal conditions, Rohu exhibits a rapid growth rate, reaching marketable size within a year, which contributes to its popularity in aquaculture.
Spawning Migrationbehavior
In natural riverine habitats, Rohu undertakes upstream spawning migrations during the monsoon season, laying eggs in flooded areas.
Ohutuseteave
Ohutu- Ohutustase: safe
- Mürgine: Ei
- Söödavus: edible
- Käsitsemisjuhised: No specific handling precautions beyond standard fish handling. Large specimens can be powerful and slippery, requiring a firm grip. No venomous spines or toxic secretions.
Sarnased liigid
Catla
Catla catla
Catla has a much broader head, an upturned mouth (superior), and larger scales compared to Rohu. Its body is also deeper and more compressed.
Mrigal
Cirrhinus mrigala
Mrigal has a more pointed snout, a subterminal mouth with two pairs of small barbels (Rohu has none), and a more silvery body coloration. Its body is also more slender than Rohu.
Kalbasu
Labeo calbasu
Kalbasu has a darker, almost blackish body coloration, a more prominent snout, and two pairs of small barbels (Rohu lacks barbels). Its lips are also less fringed.
Teaduslik klassifikatsioon
- Riik
- Animalia
- Hõimkond
- Chordata
- Klass
- Actinopterygii
- Selts
- Cypriniformes
- Sugukond
- Cyprinidae
- Perekond
- Labeo
- Liik
- Labeo rohita
Uuri lähemalt: Rohu
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