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Vietnamese-strain Korameenu (feed-converted snakehead)

The Vietnamese strain of striped snakehead (Channa striata), known locally as korameenu in Telugu, is a hatchery-bred line domesticated over several generations in Vietnam and weaned onto pelleted feed from the fry stage. It is the preferred seed for commercial pond grow-out of murrel in coastal Andhra Pradesh and is supplied by feed-trained hatcheries that ship fingerlings across the country.

Origin and distribution

The strain originated in Vietnam, where snakehead aquaculture is an established industry, and was introduced to India as hatchery-bred fingerlings. Indian commercial murrel farms in Andhra Pradesh, Telangana, Bihar and West Bengal now widely use the strain. ICAR-CIFA Bhubaneswar has standardised captive breeding and seed-rearing protocols for striped murrel that complement Vietnamese-derived feed-training methods.

Morphology and biology

Morphologically the Vietnamese strain is the same species (Channa striata) as native Indian populations; the difference is behavioural and physiological, the result of domestication. Compared with non-domesticated stock such as the Cambodian wild line, the Vietnamese fish accept artificial pellet diets from the fry stage, grow faster, and show lower cannibalism — a critical trait in pond grow-out where wild murrel juveniles routinely cannibalise smaller siblings.

Performance

Peer-reviewed work comparing domesticated Vietnamese stock with non-domesticated Cambodian stock recorded significantly higher acceptance of artificial pellet diets, faster growth and lower cannibalism in the Vietnamese line. Indian commercial farms report harvest weights of around 900 g to 1 kg or more after a roughly 7-month grow-out cycle, with growth slowing once fish exceed 1 kg.

Management

The strain is stocked in standard murrel grow-out ponds (Murrel Korameenu Farming) of 0.1-0.2 ha with water depth 1-1.5 m, built using standard earthen-pond engineering (Fish Pond Construction). Pellet feed is provided several times daily; predator-exclusion netting (Pond Biosecurity Bird Snake Netting) is essential. Fingerlings are sourced from accredited feed-trained hatcheries (see Fingerling Seed Quality) rather than wild capture.

See also: Murrel Korameenu Farming, Fingerling Seed Quality, Fish Pond Construction, Pond Biosecurity Bird Snake Netting.

References

  1. Performance of Domesticated (Vietnamese) vs Non-domesticated Snakehead. University of Rhode Island DigitalCommons.
  2. Cannibalism mitigation in striped murrel with hatchery seed weaned on pellet diet. Reviews in Aquaculture.
  3. Recent Trends in Murrel Culture in Ponds. NFDB.