Calculate fish/shrimp stocking density, total seed requirement, and daily feed amount for pond and cage aquaculture.
Calculate fish and shrimp stocking density, total seed requirement, expected yield, total feed, and daily feed amount for pond and cage aquaculture. Input culture system, water surface, depth, species, target yield, harvest size, and FCR. Plan your stocking and feed budget accurately.
You stocked 10,000 tilapia fingerlings in a 0.5-hectare pond (20,000/ha) because a neighbor said "more fish = more profit." By month 3, dissolved oxygen dropped to 2 mg/L at dawn, 30% of fish died, and survivors were stunted at 150g instead of 500g. You harvested 525 kg instead of the expected 5,000 kg. Semi-intensive tilapia should be stocked at 2-5 fish/m² (20,000-50,000/ha) — but that requires aeration, complete feed, and water exchange. Without those inputs, 5,000-10,000/ha is the maximum. Stocking density must match your management level, not your ambition.
Enter target production in kg per hectare or per cubic meter, expected harvest weight in grams, expected survival rate percentage, and available water volume or pond area. Click calculate to see number of fingerlings to stock, stocking density per m³ or per ha, and biomass at harvest.
The aquaculture stocking calculator determines the number of fish or shrimp to stock in a pond or tank based on target production, expected harvest weight, survival rate, and carrying capacity. Proper stocking density ensures optimal growth, water quality, and profitability in fish farming operations.
A: Extensive ponds (no aeration): tilapia 2,000-5,000/ha, catfish 5,000-10,000/ha, carp 3,000-8,000/ha. Semi-intensive (some aeration/feeding): tilapia 10,000-30,000/ha, catfish 20,000-50,000/ha, shrimp 50,000-150,000/ha. Intensive (high aeration, water exchange): tilapia 50-100 fish/m³, catfish 100-200 fish/m³, salmon 15-25 kg/m³ (cages), shrimp 100-300/m² (lined ponds). RAS (recirculating aquaculture systems): 50-100+ kg/m³. Density depends on: species, aeration capacity, water exchange, feeding rate, and management skill.
A: Formula: Stocking number = (Target yield kg/ha × 1000 g/kg) ÷ (Harvest weight g × Survival rate %). Example: target 10,000 kg/ha tilapia, harvest weight 500g, survival 85%: Stocking = (10,000 × 1000) ÷ (500 × 0.85) = 10,000,000 ÷ 425 = 23,529 fish/ha. Always account for mortality during the grow-out period — if you stock exactly the number needed at harvest, you'll fall short due to deaths. Survival rates: tilapia 80-90%, catfish 75-85%, salmon 85-95%, shrimp 60-75%. Use conservative survival estimates to avoid understocking.
A: Primary limiting factors: dissolved oxygen (must stay >5 mg/L for most species, below 3 mg/L causes stress/death — aeration is critical at high density), ammonia/nitrite levels (fish waste decomposes to toxic ammonia — need biological filtration or water exchange), feeding rate and waste accumulation, disease risk (high density increases transmission and stress), water temperature and oxygen carrying capacity (warm water holds less oxygen), and fish behavior (some species are territorial or cannibalistic at high density). Start at lower densities and increase gradually as you gain experience and invest in aeration/filtration. Monitor water quality daily (DO, temperature, pH, ammonia) and have backup aeration and power for intensive systems.