Aquaculture Feed Management & Feed Conversion Ratio (FCR) Sizing
Optimize feeding regimes, reduce feed costs, and accelerate fish growth rates. Calculate daily feeding rates as percentage of body weight, balance crude protein across life stages, and inspect feeding check trays.
1. Feed Conversion Ratio (FCR) Optimization
Feed accounts for 60% to 70% of total recurring operational expenses in commercial fish farming. Controlling Feed Conversion Ratio (FCR) is the single greatest determinant of farm profitability:
FCR = Total Feed Distributed (kg) ÷ Net Fish Biomass Gained (kg)
A lower FCR indicates higher feed utilization. Commercial farmers target an FCR between 1.1 and 1.4 in modern biofloc/RAS systems, and 1.4 to 1.8 in earthen ponds.
2. Dietary Crude Protein (CP) Requirements by Growth Stage
- Fry & Early Nursery (0.5g – 5g): 40% – 45% Crude Protein micro-pellets (0.5mm – 1.0mm size) fed at 8% – 12% of total body weight daily across 4 to 6 feedings.
- Fingerlings (5g – 50g): 32% – 36% Crude Protein floating pellets (1.5mm – 2.0mm) fed at 4% – 6% of body weight daily across 3 feedings.
- Grow-Out Stage (50g to Harvest): 28% – 32% Crude Protein floating pellets (3.0mm – 4.0mm) fed at 2% – 3% of body weight daily across 2 feedings.
3. Commercial Feed Manufacturing Machinery & Automation
Large commercial aquaculture enterprises lower production costs by 20% to 35% through on-farm feed extrusion and automate daily feeding schedules:
Small-Scale On-Farm Floating Feed Pellet Extruder
High-shear single or twin-screw extrusion cooker producing 1.0mm to 6.0mm floating pellets. High temperature and pressure cook and gelatinize starches, providing 100% pellet buoyancy for >12 hours on water. Output capacities range from 80 kg/hr to 350 kg/hr on 15 to 30 HP electric or diesel power.
Stainless Steel Hammer Mill Pulverizer
High-speed rotating beaters pulverize raw soya, fishmeal, maize, and rice bran down to fine flour (60 to 80 mesh) to ensure consistent pellet binding and prevent extruder die clogging.
Solar / Electric Programmable Automatic Fish Feeders
Automated broadcast spreaders programmed to feed fish at precise intervals throughout peak daytime metabolism. Delivers smaller, frequent meals that increase digestion efficiency and prevent water fouling.