Gce Model Questions Vol1 2018 Agricultural Science Question 28
Practice objective / multiple choice question 28 from the 2018 Gce Model Questions Vol1 Agricultural Science examination.
A lake fish population follows the logistic growth model \(\dfrac{dN}{dt}=rN\left(1-\dfrac{N}{K}\right)\) with intrinsic growth rate \(r=0.5\) yr⁻¹ and carrying capacity \(K=200\,000\) fish. The fishery harvests a constant number \(H\) fish each year.\n\n(i) Determine the value of \(H\) that gives the maximum sustainable yield (MSY).\n(ii) Find the equilibrium population size when the fishery operates at this MSY level.\n(iii) If the average weight of a fish is 0.8 kg, express the annual sustainable yield in tonnes.
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This is Gce Model Questions Vol1 2018 Agricultural Science Question 28. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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