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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: no feeding, natural food only, 0.5-2 t/ha, low density (fish/carp 1,000-5,000/ha). Semi-intensive: supplemental feed, some fertilization, 3-8 t/ha, medium density (tilapia 20,000-50,000/ha, catfish 5,000-10,000/ha). Intensive: complete feed, aeration, water exchange, 10-30 t/ha, high density (catfish 10,000-30,000/ha, tilapia 50,000-100,000/ha). Super-intensive/RAS: 50-200 kg/m³, complete environmental control. Each level requires more investment, management skill, and risk.
A: Dissolved oxygen (DO): ≥5 mg/L for most fish, ≥4 for tilapia/catfish (can tolerate 2 for short periods). Below 3 mg/L = stress, reduced feeding, death. pH: 6.5-9.0 (optimal 7.0-8.5). Below 6 or above 9.5 = stress. Ammonia (NH3): <0.5 mg/L (un-ionized). Nitrite: <0.5 mg/L. Temperature: species-specific (tilapia 25-30°C, trout 10-18°C, shrimp 26-32°C). Measure DO at dawn (lowest point) and mid-afternoon (highest). Test water weekly — more often in intensive systems.
A: Daily feed = fish biomass × feeding rate (% body weight/day). Feeding rate varies by size and temperature: fry/fingerlings 5-10% BW/day, juveniles 3-5%, adults 1-3%. Reduce by 50% when temperature is below optimal. Feed 2-3 times daily for small fish, 1-2 times for adults. Use floating feed to observe feeding response — stop when fish stop eating aggressively. Total feed for crop = expected yield × FCR. FCR: tilapia 1.5-2.0, catfish 1.5-2.0, salmon 1.0-1.2, shrimp 1.2-1.8. Feed is 50-70% of total production cost — accurate feeding is critical for profitability.