Lecture 8

Question 1

Life table

Answer 1

a summary of how survival and reproductive rates vary with age

Question 2

Sx

Answer 2

survival rate; chance that an individual of age x will survive to age x+1

Question 3

Ix

Answer 3

survivorship; proportion of individuals that survive from birth to age x

Question 4

Fx

Answer 4

fecundity; average number of offspring a female will have at age x

Question 5

Growth Rate (λ)

Answer 5

ratio of population size in year t+1 (Nt+1) to population size in year t (Nt); λ= (Nt+1)/(Nt)

Question 6

Geometric Growth

Answer 6

if a population reproduces in synchrony at discrete time periods and growth rate doesn’t change

Question 7

Growth rate =

Answer 7

Nt+1 = λNt

Question 8

Exponential Growth (r)

Answer 8

when individuals reproduce continuously, and generations can overlap

Question 9

Exponential Growth rate =

Answer 9

dN/dt = rN

Question 10

Density-independent factors

Answer 10

weather

Question 11

Population regulation

Answer 11

density-dependent factors cause population to increase when density is low and decrease when density is high

Question 12

Logistic growth

Answer 12

population increases rapidly, then stabilizes at the carrying capacity

Question 13

Logistic growth=

Answer 13

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

Question 14

N

Answer 14

population density

Question 15

r

Answer 15

per capita growth rate

Question 16

K

Answer 16

carrying capacity