Neco 2025 Agricultural Science Question 5

A tilapia farm starts with 800 kg of fingerlings in a recirculating system. Over a 90‑day production cycle the average daily feed given is 2.5% of the live biomass present that day. The feed contains 35% protein and the protein conversion efficiency (PCE) is 20% (i.e., 20% of feed protein is retained as fish growth). At harvest the total biomass is 1500 kg.\n\n(a) Calculate the total amount of feed (in kg) supplied over the cycle (assume the biomass increases linearly so that the average biomass is the mean of the initial and final weights).\n(b) Determine the total protein intake from the feed (in kg).\n(c) Using the given PCE, find the total protein retained in the fish (in kg) and compare it with the theoretical protein gain calculated from the increase in biomass (assume fish body is 20% protein). State whether the PCE figure appears realistic.