Commercial Aquaculture, Tilapia/Catfish Cage Farming & Fish Fillet Processing Export ERP: Dissolved Oxygen IoT Telemetry, Extruded Feed Biomass Growth Curves, and EU Cold-Chain Traceability

Commercial aquaculture in East Africa—particularly high-density HDPE floating cage farms on Lake Victoria, recirculating aquaculture systems (RAS), sex-reversed monosex tilapia hatcheries, and HACCP/EU-certified fish filleting plants—is one of the fastest-growing protein sectors in the region. Yet because fish swim underwater out of sight, farms without rigorous biomass and feeding math routinely discover at harvest day that 30% of their projected fish biomass is missing while extruded floating feed (which accounts for 65%–75% of operating cost) has been overfed or stolen.

At devManue, we engineer specialized Commercial Aquaculture, Cage Fish Farming & Fillet Processing ERP systems that integrate hatchery broodstock/fry cohorts, daily water-temperature and dissolved-oxygen (DO mg/L) feeding algorithms, bi-weekly sample-weighing Average Body Weight (ABW) growth curves, boat-to-shore harvest security, and processing-plant gutting/filleting yield reconciliation.

1. Eliminating the Three Profit Killers in Commercial Cage & Pond Aquaculture

• Blind Overfeeding & Extruded Floating Pelleted Feed Theft: Feeding a cage based on a static calendar rather than actual surviving biomass, Average Body Weight (ABW), and lake water temperature/dissolved oxygen wastes tons of expensive 30%–40% crude-protein feed—or masks boat crews selling feed bags to informal pond farmers along the lakeshore.
• Unnoticed Cage Mortality, Net Predation & Night Poaching: When a 6-month production cycle ends with 14 tons harvested instead of the projected 20 tons, spreadsheet logs cannot distinguish whether the loss came from Streptococcus mortality in month 3, a torn cage net, or night poaching prior to harvest.
• Gutting, Filleting & Ice-Glazing Yield Variance at the Processing Plant: Whole round tilapia or Nile perch entering the processing factory must be reconciled across gutted-and-scaled whole fish, skinless fillets, fish maw, and frames/heads, while controlling blast-freezer protective ice-glaze percentage.

2. Dynamic Water-Quality & Biomass Feeding Table + eFCR Engine

Our aquaculture engine calculates the exact daily feed ration in kilograms and pellet size (0.8mm starter crumble up to 4.5mm finisher) for every floating cage by combining estimated surviving population, latest sampled Average Body Weight (ABW), water temperature, and dissolved oxygen safety thresholds:

from decimal import Decimal, ROUND_HALF_UP
import math

class AquacultureBiomassAndFeedingEngine:
    """
    Computes cage biomass, Specific Growth Rate (SGR), economic Feed Conversion
    Ratio (eFCR), and DO/temperature-adjusted daily feed rations.
    """
    @staticmethod
    def calculate_daily_cage_feed_ration(
        estimated_fish_count: int,
        average_body_weight_g: Decimal,
        base_body_weight_feed_pct: Decimal,
        water_temp_celsius: Decimal,
        dissolved_oxygen_mg_l: Decimal,
    ) -> dict:
        standing_biomass_kg = (Decimal(estimated_fish_count) * average_body_weight_g / Decimal("1000")).quantize(
            Decimal("0.01"), rounding=ROUND_HALF_UP
        )
        # Suspend or throttle feeding if Dissolved Oxygen drops below safe metabolic thresholds
        if dissolved_oxygen_mg_l < Decimal("3.0"):
            env_modifier = Decimal("0.00")  # Emergency DO stop-feeding lock
        elif dissolved_oxygen_mg_l < Decimal("4.5"):
            env_modifier = Decimal("0.50")
        elif water_temp_celsius < Decimal("22.0") or water_temp_celsius > Decimal("31.0"):
            env_modifier = Decimal("0.75")
        else:
            env_modifier = Decimal("1.00")

        adjusted_ration_kg = (
            standing_biomass_kg * (base_body_weight_feed_pct / Decimal("100")) * env_modifier
        ).quantize(Decimal("0.1"), rounding=ROUND_HALF_UP)

        return {
            "standing_biomass_kg": standing_biomass_kg,
            "environmental_feed_modifier": env_modifier,
            "recommended_daily_feed_kg": adjusted_ration_kg,
            "low_oxygen_halt_triggered": dissolved_oxygen_mg_l < Decimal("3.0"),
        }

3. Size-Graded Whole Fish Pricing, Filleting Mass-Balance & City Depot Sync

At harvest, tilapia price per kilogram varies sharply by size grade (Size 1: 100–200g, Size 2: 200–300g, Size 3: 300–500g, Jumbo: 500g+). Our ERP interfaces directly with shore-landing Bluetooth platform scales to sort harvested crates by size grade, tracks reefer-truck dispatch from the lakeshore to Nairobi/Mombasa cold-room depots, and reconciles retail POS sales and KRA eTIMS receipts down to the exact cage harvest batch.