Gce Model Questions Vol1 2019 Biology Question 48

Practice objective / multiple choice question 48 from the 2019 Gce Model Questions Vol1 Biology examination.

Gce Model Questions Vol1 2019 Biology Objective / Multiple Choice Hard Difficulty
Question 48 GCE_MODEL_QUESTIONS_VOL1 • 2019 • BIOLOGY • objective

A fish population follows the logistic growth model \(\frac{dN}{dt}=rN\left(1-\frac{N}{K}\right)\). The intrinsic growth rate is \(r=0.5\) yr\(^{-1}\) and the carrying capacity is \(K=20\,000\) fish. A constant harvest of \(H\) fish per year is applied.\n\n(a) Determine the maximum sustainable harvest (MSY) and the equilibrium population size at which this harvest can be maintained.\n(b) If management wishes to keep the population at \(80\%\) of the carrying capacity, what constant harvest rate should be set?

Answer Options

A. a) MSY = 2 500 fish/yr, equilibrium N = 15 000 fish; b) H = 2 000 fish/yr
Correct Answer B. a) MSY = 2 500 fish/yr, equilibrium N = 10 000 fish; b) H = 1 600 fish/yr
C. a) MSY = 2 000 fish/yr, equilibrium N = 8 000 fish; b) H = 1 200 fish/yr
D. a) MSY = 3 000 fish/yr, equilibrium N = 12 000 fish; b) H = 2 400 fish/yr
Correct Answer
B
Correct Option:
a) MSY = 2 500 fish/yr, equilibrium N = 10 000 fish; b) H = 1 600 fish/yr

About This Question

This is Gce Model Questions Vol1 2019 Biology Question 48. It is one of the objective questions from the 2019 Gce Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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