Waec Model Questions Vol1 2019 Agricultural Science Question 35
Practice objective / multiple choice question 35 from the 2019 Waec Model Questions Vol1 Agricultural Science examination.
A fish population in a lake follows the logistic growth model dN/dt = rN(1 - N/K) - H, where N is the stock size (number of fish), r = 0.4 yr⁻¹ is the intrinsic growth rate, K = 200 000 fish is the carrying capacity, and H is a constant annual harvest. (a) Determine the stock size at which the maximum sustainable yield (MSY) occurs and compute the value of MSY (in fish per year). (b) If the current stock is 80 000 fish and the manager wishes the stock to decline to 70 000 fish after one year, what constant harvest H (fish per year) must be applied? (c) Compare this harvest with the MSY and comment on its sustainability.
Answer Options
About This Question
This is Waec Model Questions Vol1 2019 Agricultural Science Question 35. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.