rearing of carp in combined intensive extensive cie systems...
TRANSCRIPT
IV. International Carp Conference, 21-22 September 2017, Zagreb, Croatia
Rearing of carp in Combined Intensive ExtensiveCIE systems: Practical results and experiences
Laszlo VaradiHungarian Aquaculture and Fisheries Inter-branch Association (MA-HAL)
CIE systems for rearing common carp
1. Fishpond water recirculation
2. Pond in pond system
3. Cage in pond system
4. Intensive fish production combined with wetland
5. Combination of indoor RAS and CIE system
1. Fishpond water recirculation (outdoor RAS)
Intensive fish ponds
Extensive fish pond
Combining advantages of both extensive and intensive fish production increasing the production volume and preserving valuable wetlands
Common carp dominatedpolyculture
Extensive component:Intensive component:
Fishpond water recirculation
Practical application at Jaszkiser „Halas” Co.
Extensive pond for polyculture fish production
Intensive carp production
Fishpond water recirculation
Components of the CIA system
Intensive carp production in small size ponds of the CIE system
• Stocking high quality fingerling with high stocking density;
• Applying high quality feed distributed by automatic feeder;
• Providing aeration, based on regular water quality monitoring;
• Protection from predators and poaching;
Main features:
• Total yield: 10 t/ha• Body mass at stocking/harvest: 0.3 kg/1.5 kg• Total cost: 14,672 €/ha: • Total income: 19,138 €/ha• Result: 4,293 €/ha
Main production data :
Fish pond area: 2000 m2
Source: Borbely, 2012
Main production data at „Halas” Ltd. Co. In Hungary:
Semi-intensive production in the conventional pondsof the CIE system
Main production data at „Halas” Ltd. Co. In Hungary:
Item Main production data Cost/Income
Euro/ha %
Water 18,000 m3/ha 252 19
Stocking material 1000 pcs/ha (300g) 672 50
Feed 3000 kg/ha (FCR: 1:4) 420 31
Total cost: 1344 100
Harvest 1050 kg/ha (1.5 kg) 1995
Result: 651
2. Pond in pond system
Extensive unit:• Ecosystem services• Nutrient recycling• Fish production
Intensive unit:Production of highvalue species
Scheme of the “Pond-in-pond” system
Construction of the “Pond-in-pond” system
Four fish rearing tanks of 30 m3 each are arranged in a floating unit with a total volume of 120 m3
View of the “Pond-in-pond” system in operation
Hybrid striped bass (Morone saxatilis x M. Chrysosps) is produced intensively with a stocking density of 40 kg/m3
Main production data of the “Pond-in-pond” system
Intensive unit (120 m3):
Production of hybrid striped bass 40 kg/m3
Cost: 15,000 €/haIncome: 29,000 €/haResult: 14,000 €/ha
Extensive unit (20 ha):
Polyculture production: 1050 kg/ha yield
Cost: 1,331 €/haIncome: 1,987 €/haResult: 656 €/ha
Common carp in polyculture
Hybrid striped bass
Main components of the system
3. Cage in pond system
Commercial application at „Aranyponty” Fishfarming Co.
Common carp as „secondary” species in a „cage in pond” CIE system
Common carp
Silver carp
Grass carp
Paddle fish
European catfish
Intensive European catfish production in net cage that is placed in a conventional fish pond
The yield in the extensive pond was 700 kg/ha (500 kg/ha common carp and 200 kg/ha paddle fish)
500 kg European catfish of 1350 g was produced in one cage (10 kg/m3) on pellet
Main species and production data
4. Effluent treatment in constructed wetland (pilot system in HAKI)
Intensive fish farm
Constructed wetland
Intensive fish production combined with constructed wetland
Source: Radics, 2011
Intensive African catfish productionIn flow-through system supplied with geothermal water3600 m3 fish tank volume~1000 t/year production
Effluent water treatment in constructed wetland with a total area of 7.1 ha including extensive fish ponds and plant bed (reed and bullrush)
Key components of the system
Intensive African catfish productionIn flow-through system supplied with geothermal water3600 m3 fish tank volume~1000 t/year production
Effluent water treatment in constructed wetland with a total area of 7.1 ha including extensive fish ponds and plant bed (reed and bullrush)
Commercial application by Szarvasfish Co.
.Fish pond I.
3.6 ha
Settling pond
Intensive fish farm
3600 m3
Fish pond II.
1 ha
Wetland
0,5 ha
To receiver (river)
Seepage ditch (1.79 ha)
Source: Radics, 2011
Maximal water exchange: once per day
Intensive fish production combined with constructed wetland
Scheme of the system
Water quality parameter (mg/l)
Limit value(mg/l)
Outflow fromwetland(mg/l)
BOI 50 46
Total N 55 12
Total P 10 1.5
TSS 200 21
Major water parameters during the trial operation in 2010
Significant reduction of nutrients in effluent two moth after strating the operationImprovement of treatment efficiency is expectedEfficiency is depending on water temperature (season)
Source: Radics, 2011
Intensive fish production combined with constructed wetland
.Fish pond I.
3.6 ha
Settling pond
Intensive fish farm
3600 m3
Fish pond II.
1 ha
Wetland
0,5 ha
To receiver (river)
Seepage ditch (1.79 ha)
Source: Radics, 2011
Intensive fish production combined with constructed wetland
Main products of the CIE system
Source: Radics, 2011
Main advantages and disadvantages of the combination of intensive system with constructed wetland
Advantages- The water purifying efficiency is high - The running and maintenance costs of the wetland are low- The natural treatment system also provides ecological services
Disadvantages- Area requirement is high- The investment cost is relatively high- Purifying efficiency is depending on climatic conditions
5. Combination of indoor RAS and CIE system
Fingerling
Fingerling
Sludge Effluent
Intensive fish production unit
Fish tanks
Water treatment unit
INDOOR RAS
CIE SYSTEM (OUTDOOR RAS)
Fish pond
Summary and conclusions
• CIE systems offer new opportunities in freshwater aquaculture especially in pond aquaculture regions
• The feasibility of the commercial use of CIE systems has been well demonstrated
• CIE systems however have „seasonal” limitation
• Further research and innovation is needed to improve efficiency and to cope with seasonal limitation
• Opportunities in the combination of indoor RAS and CIE systems should be further explored
