Waec Model Questions Vol1 2025 Agricultural Science Question 27
Practice objective / multiple choice question 27 from the 2025 Waec Model Questions Vol1 Agricultural Science examination.
A lake stocked with tilapia has a carrying capacity K = 5 000 t and an intrinsic growth rate r = 0.4 yr⁻¹. The fishery uses a net with catchability coefficient q = 0.0005 per 1 000 net‑hours (E is measured in 1 000 net‑hours). The current fishing effort is 200 (i.e. 200 000 net‑hours per year). Management wishes to set the effort so that the annual catch equals 80 % of the maximum sustainable yield (MSY). Determine the required effort (in 1 000 net‑hours) and state whether the current effort should be increased or decreased, giving the percentage change needed.
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This is Waec Model Questions Vol1 2025 Agricultural Science Question 27. It is one of the objective questions from the 2025 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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