Waec Model Questions Vol1 2017 Biology Question 12
Practice objective / multiple choice question 12 from the 2017 Waec Model Questions Vol1 Biology examination.
A fish population in a lake follows the logistic growth model \(\frac{dN}{dt}=rN\left(1-\frac{N}{K}\right)\) with intrinsic rate \(r=0.5\) yr⁻¹ and carrying capacity \(K=20\,000\) fish. A constant harvest of \(H\) fish per year is imposed.\n(a) Determine the maximum sustainable harvest \(H_{max}\) that allows a non‑zero equilibrium.\n(b) If the lake is stocked with \(N_0=8\,000\) fish and the harvest is set at this maximum value, what is the fish population after 5 years? (Give the nearest whole fish.)
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This is Waec Model Questions Vol1 2017 Biology Question 12. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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