Neco Model Questions Vol1 2024 Biology Question 7

In a lake ecosystem, phytoplankton perform photosynthesis producing a gross primary productivity of 1200 kcal m\(^{-2}\) day\(^{-1}\). Ten percent of this energy is lost to phytoplankton respiration, and twenty percent of the remaining net primary production is not consumed and sinks to the sediment. Zooplankton consume seventy percent of the energy that remains after the sinking loss. Of the zooplankton biomass, fifteen percent is transferred to small fish and five percent is transferred directly to large fish. Large fish also obtain forty percent of the small‑fish biomass through predation. Determine the total amount of energy (in kcal m\(^{-2}\) day\(^{-1}\)) that becomes available to large fish.