Question

1. Which of the following is not a reason that Isle Royal is a good instance to study predator-prey interaction and carrying capacity? Select one: a. Geographical isolation b. The predators have access to many kinds of different prey c. The populations of predators and prey have access to enough resources to support themselves d. The geographical range is large enough to track the organisms

LAB: Isle Royale

2. In the graph you generated in Exercise 2, which species tended to have a larger population size? Select one: a. wolf b. moose

3. In Exercise 1, you studied the moose population on Isle Royale before the wolves arrived. Choose the statement that best describes your results. Select one: a. The moose population did not reach carrying capacity within the first 50 years of their presence on the island. b. The growth of the moose population is more similar to the logistic growth model than the exponential growth model. c. The moose population grew the fastest when it was smallest. d. The addition of 200-300 moose caused K to increase.

4. The value of dN/dT for a population that has reached carrying capacity is = 1. Select one: True False

Answer 1

Ans 1. b. The predators have access to many kinds of different prey.

d. True.

dNdt=rN(1−NK) is the formula for determining the change in population size.

Explanation:

Legend for the above formula:

dNdt = change in population size, r= intrinsic rate of increase,

N = population size; K = carrying capacity.

To solve for carrying capacity, isolate for K:

K=rN((1−N))dNdt

There is maximal population growth at carrying capacity thus:

N=K2

Your formula would give you the carrying capacity:

K=r(K2)(1−K2)dNdt