Exam 2 Equations

Question 1

When do you use M/N=R/C ?

Answer 1

Mark recapture studies

Question 2

When do you use Nt = Noλ?

Answer 2

Geometric growth

measures growth from one season to the next

Question 3

When do you use N_t = N_oe^rt

Answer 3

used to predict N at a time in the future for exponential growth

N_t = pop size after time (t). N_o= initial pop size, r= growth rate)

Question 4

When do you use dN/dt = rN ?

Answer 4

used for exponential growth.

Change in population/Change in time = growth rate (r) * initial population size (N)

Question 5

dN/dt = rN(1-N/K)

Answer 5

used for Logistic growth (K = carrying capacity)

Question 6

r = b-d

Answer 6

exponential growth rate (b = birth rate, d=death rate)

Question 7

Answer 7

for unequal interspecific competition (a (alpha) = effect of individuals of species 2 have on the population growth of species 1)

Question 8

dN/dt = rN-aNP

Answer 8

change in prey population over time

(a = capture efficiency of predators. P = # predators, N = # of prey)

Question 9

dP/dt = baNP-mP

Answer 9

change in predator population over time

(a = capture efficiency of predators, b = efficiency w/ which prey are converted to predator offspring, m = mortality rate of predators, P = # predators, N = # of prey)

Question 10

Answer 10

for unequal interspecific competition (beta = effect of individuals of species 1 have on the population growth of species 2)