Fish in RAS


Biology and Ethology It readily accepts and makes good use of the feeding provided, does not have high spatial requirements, is very tolerant of high-intensity breeding, has short-term tolerance to deteriorated water quality and high intensity of growth. Spawn and fry available throughout the year
Optimal temperature 13-18°C
Production intensity 80-120kg/m3
Duration of breeding up to market weight 10-12 months
Feed coefficient (kg of feed/kg of weight increase) 0,9-1,1
Feed coefficient (kg of feed/kg of weight increase) Approx. 1.2 kg of O₂ per 1 kg of fish
Yield = fillet weight/fish weight 65-70%
Losses during breeding up to 5%
Biologie a Etologie Shy and cautious fish, with a tendency to remain at the bottom of the breeding tank; needs peace and stability of environment; negatively responds to any sudden changes; accepts feed from a feeder column and from the bottom; prone to cannibalism; need for regular sorting; relatively high growth intensity in good conditions. High demand on the market.
Optimal temperature 23-24°C
Production intensity 60-80kg/m3
Duration of breeding up to market weight 12–15 months (from 10 g to approx. 1.2 kg)
Feed coefficient (kg of feed/kg of weight increase) 1,1-1,2
Oxygen consumption Approx. 1.2 kg of O₂ per 1 kg of fish
Yield = fillet weight/fish weight 40-45%
Losses during breeding up to 20% (from approx. 10 g to approx. 1200 g)
Biology and Ethology Active and lively fish; eats well from the surface and from a feeder column; manual feeding is ideal; if fed automatically, the fish grows excessively and large individuals show a tendency towards cannibalism; not as demanding as pike; grows at lower temperatures; relatively prone to long-term increased ammonia content (it stops growing). High demand in Switzerland and Scandinavia.
Optimal temperature 21-23°C
Production intensity 60-80kg/m3
Duration of breeding up to market weight 8–10 months (from 5 g to approx. 200 g)
Feed coefficient (kg of feed/kg of weight increase) 1,2
Oxygen consumption Approx. 1.2 kg of O₂ per 1 kg of fish
Approx. 1.2 kg of O₂ per 1 kg of fish 35-38%
Losses during breeding up to 10% (from approx. 10 g to approx. 200 g)
Biology and Ethology Thermophilic, not demanding in terms of environmental conditions, tolerant to lower oxygen content and higher pH, fast and intensive growth with good feed utilization, well tolerated high production intensity, photophobic, prefers dark environment, prone to ichthyophthtiriosis during the first year of life, intensive breeding up to sexual maturity means frequent attacks among the fish, grows excellent muscles without inter-muscular bones,
Optimal temperature 24-26°C
Production intensity 100 – 150kg/m3
Duration of breeding up to market weight 12 months (from 10 g to approx. 2.5 kg)
Feed coefficient (kg of feed/kg of weight increase) 1,2
Oxygen consumption Approx. 0.8 kg of O₂ per 1 kg of fish
Yield = fillet weight/fish weight 35-37%
Losses during breeding  8-10%  (od cca 10g do cca 2,5Kg)
Biology and Ethology Thermophilic, photophobic, with high resistance to densified populations (stocking) and deteriorated environmental conditions, tolerant of very low oxygen content, higher ammonia content and high organic content. Fast growth and high increments under suitable breeding conditions, spawn several times a year, relatively resistant to diseases, when breeding of fry it is necessary to pay attention to constant air and water temperature in the breeding room to avoid inflammation of labyrinth (respiratory system)
Optimal temperature 25-27°C
Production intensity 250 – 400kg/m3
Duration of breeding up to market weight 6–9 months (from 10 g to approx. 1.2 kg)
Feed coefficient (kg of feed/kg of weight increase) 0,9-1,2
Oxygen consumption Approx. 0.5 kg of O₂ per 1 kg of fish
Yield = fillet weight/fish weight 39-42%
Losses during breeding  8-10%  (od cca 10g do cca 1,2Kg)
  • Sturgeon (acipenseridae)
  • Caspian sturgeon (Acipenser ruthenus)
  • Siberian sturgeon (Acipenser baerii)
  • Russian sturgeon (Acipenser gueldenstaedtii)
  • Starred sturgeon (Acipenser stellatus)
  • Great sturgeon (Huso huso)
  • And their hybrids, it is also possible to breed, for instance, North American sturgeon species
Biology and Ethology Sturgeon are long-lived fish, spawn and fry breeding require high expertise and technological background. The breeding of market fish is relatively simple. They can be bred for the production of caviar, meat or for ornamental or sports purposes.
Optimal temperature 14–20 °C (depending on the species)
Production intensity 60-80Kg/m3
Duration of breeding up to market weight 14–24 months (from approx. 10 g to 1.5 kg)
Feed coefficient (kg of feed/kg of weight increase) 0,9-1,1
Oxygen consumption Approx. 1.2 kg of O₂ per 1 kg of fish
Approx. 1.2 kg of O₂ per 1 kg of fish 35%
Losses during breeding do 25%

 

RAS can also be used for the breeding of other species, the perspective of which is still problematic for many reasons. Their mass breeding is more a question for the future. These include, for example, eel, whitefish, burbot, tilapia, Arctic char, salmon and others.


Arctic char
Salvelinus alpinus


Common whitefish maraena/peled
Coregonus lavaretus peled/marena


Burbot
Lota lota


Salmon
Salmo salar


Tilapia
Oreochromis niloticus

 


Eel
Anguilla anguilla