Question 1

If n2 = 800 and d2 = 200, what is n1?

Accepted Answer

A)  0.25 
B)  4.0 
C)  600 
D)  1000 
E)  160,000 
A)  0.25 
B)  4.0 
C)  600 
D)  1000 
E)  160,000 D

Question 2

If?xlxmx for a population rats is 2.0 and the net reproductive rate is 1.6, then what is the average generation time?

Accepted Answer

A)  0.4 
B)  0.8 
C)  1.25 
D)  2.0 
E)  3.6 
A)  0.4 
B)  0.8 
C)  1.25 
D)  2.0 
E)  3.6 C

Question 3

Survivorship of which of the following organisms is likely to be analyzed with a static life table?

Accepted Answer

A)  Butterfly 
B)  Annual plant 
C)  Elephant 
D)  American robin 
E)  Barnacle 
A)  Butterfly 
B)  Annual plant 
C)  Elephant 
D)  American robin 
E)  Barnacle C

Question 4

In a life table the proportion of individuals surviving in an age class is given by

Accepted Answer

A)  nx 
B)  dx 
C)  lx 
D)  qx 
E)  ex 
A)  nx 
B)  dx 
C)  lx 
D)  qx 
E)  ex

Question 5

A cohort life table follows a group of individuals from birth to death.

Accepted Answer

A) True 
 B)False

Question 6

Shooting older males of Dall Mountain sheep would increase the qx of later age groups.

Accepted Answer

A) True 
 B)False

Question 7

Net reproductive rate, R0, is given by

Accepted Answer

A)  lx 
B)  mx 
C)  lx mx 
D) $\Sigma$lx mx 
E)  $\Sigma$xlx mx 
A)  lx 
B)  mx 
C)  lx mx 
D) $\Sigma$lx mx 
E)  $\Sigma$xlx mx

Question 8

If n0 = 100 and d0 = 20, what is q0?

Accepted Answer

A)  0.2 
B)  0.8 
C)  5.0 
D)  800 
E)  2 
A)  0.2 
B)  0.8 
C)  5.0 
D)  800 
E)  2

Question 9

If Nt = 50 and R0 =2, Nt+1=

Accepted Answer

A)  0.04 
B)  25 
C)  52 
D)  100 
E)  1000 
A)  0.04 
B)  25 
C)  52 
D)  100 
E)  1000

Question 10

The following data represent sparrow survival, from age 0-6 on an offshore Canadian island: 115, 25, 19, 12, 2, 1, 0. In which age is the proportion surviving the highest?

Accepted Answer

A)  Year 1 
B)  Year 2 
C)  Year 3 
D)  Year 4 
E)  Year 5 
A)  Year 1 
B)  Year 2 
C)  Year 3 
D)  Year 4 
E)  Year 5

Question 11

In a life table qx=

Accepted Answer

A)  nx/n0 
B)  n0/nx 
C)  dx/nx 
D)  nx/dx 
E)  nx +nx+1/2 
A)  nx/n0 
B)  n0/nx 
C)  dx/nx 
D)  nx/dx 
E)  nx +nx+1/2

Question 12

In a life table, qx is

Accepted Answer

A)  The number alive at the start of a time period 
B)  The number dying during a time period 
C)  The proportion dying during a time period 
D)  The proportion surviving during a time period 
E)  Life expectancy 
A)  The number alive at the start of a time period 
B)  The number dying during a time period 
C)  The proportion dying during a time period 
D)  The proportion surviving during a time period 
E)  Life expectancy

Question 13

A cohort is

Accepted Answer

A)  A group of same aged young which grow and survive at different rates 
B)  A group of different aged young which grow and survive at similar rates 
C)  A number of individuals alive in different age classes 
D)  A group of same aged young which grow and survive at similar rates 
E)  A graphical representation of the numbers of individuals alive at various ages 
A)  A group of same aged young which grow and survive at different rates 
B)  A group of different aged young which grow and survive at similar rates 
C)  A number of individuals alive in different age classes 
D)  A group of same aged young which grow and survive at similar rates 
E)  A graphical representation of the numbers of individuals alive at various ages

Question 14

The following data give the numbers of gypsy moth life history stages in a forest in Connecticut over a generation: eggs 450, young caterpillars 315, older caterpillars 57, pupae 47, adults 16. In which stage is the mortality rate the highest?

Accepted Answer

A)  eggs 
B)  young caterpillars. 
C)  older caterpillars. 
D)  pupae 
E)  adults. 
A)  eggs 
B)  young caterpillars. 
C)  older caterpillars. 
D)  pupae 
E)  adults.

Question 15

The number of offspring born to females of a given age is

Accepted Answer

A)  lx 
B)  mx 
C)  lx mx 
D)  $\Sigma$lx mx 
E)  $\Sigma$xlx mx 
A)  lx 
B)  mx 
C)  lx mx 
D)  $\Sigma$lx mx 
E)  $\Sigma$xlx mx

Question 16

If nx = 600 and nx+1 = 400, what is Lx?

Accepted Answer

A)  0.67 
B)  1.5 
C)  200 
D)  500 
E)  1000 
A)  0.67 
B)  1.5 
C)  200 
D)  500 
E)  1000

Question 17

Given the following data which details numbers of turtles in subsequent years from birth to death, which type of survivorship curve is supported?
Data: 1000, 500, 250, 125, 63, 32, 16, 8, 4, 2, 1, 0.

Accepted Answer

A)  Type I 
B)  Type II 
C)  Type III 
D)  Type IV 
A)  Type I 
B)  Type II 
C)  Type III 
D)  Type IV

Question 18

You need to get the most accurate survivorship curve for a rare parrot. The best method is to construct a cohort life table?

Accepted Answer

A) True 
 B)False

Question 19

A population increases in size if R0

Accepted Answer

A)  1 
A)  1

Question 20

If R0=1 then we say population size is

Accepted Answer

A)  Decreasing 
B)  At equilibrium 
C)  Increasing 
D)  Declining 
E)  Going up 
A)  Decreasing 
B)  At equilibrium 
C)  Increasing 
D)  Declining 
E)  Going up

Exam 9: Life Tables and Demography

If n2 = 800 and d2 = 200, what is n1?

If?xlxmx for a population rats is 2.0 and the net reproductive rate is 1.6, then what is the average generation time?

Survivorship of which of the following organisms is likely to be analyzed with a static life table?

In a life table the proportion of individuals surviving in an age class is given by

A cohort life table follows a group of individuals from birth to death.

Shooting older males of Dall Mountain sheep would increase the qx of later age groups.

Net reproductive rate, R0, is given by

If n0 = 100 and d0 = 20, what is q0?

If Nt = 50 and R0 =2, Nt+1=

The following data represent sparrow survival, from age 0-6 on an offshore Canadian island: 115, 25, 19, 12, 2, 1, 0. In which age is the proportion surviving the highest?

In a life table qx=

In a life table, qx is

A cohort is

The following data give the numbers of gypsy moth life history stages in a forest in Connecticut over a generation: eggs 450, young caterpillars 315, older caterpillars 57, pupae 47, adults 16. In which stage is the mortality rate the highest?

The number of offspring born to females of a given age is

If nx = 600 and nx+1 = 400, what is Lx?

Given the following data which details numbers of turtles in subsequent years from birth to death, which type of survivorship curve is supported? Data: 1000, 500, 250, 125, 63, 32, 16, 8, 4, 2, 1, 0.

You need to get the most accurate survivorship curve for a rare parrot. The best method is to construct a cohort life table?

A population increases in size if R0

If R0=1 then we say population size is

An Introduction to Ecology

Population Genetics

Natural Selection, Speciation, and Extinction

Behavioral Ecology

Temperature

Water

Nutrients

Demographic Techniques and Population Patterns

Population Growth

Competition and Coexistence

Facilitation

Predation

Herbivory

Parasitism

Population Regulation

Species Diversity

Species Richness Patterns

Species Richness and Community Services

Succession

Island Biogeography

Terrestrial Biomes

Marine Biomes

Freshwater Biomes

Food Webs and Energy Flow

Biomass Production

Biogeochemical Cycles

Filters

If n₂ = 800 and d₂ = 200, what is n₁?

If?_xl_xm_x for a population rats is 2.0 and the net reproductive rate is 1.6, then what is the average generation time?

Shooting older males of Dall Mountain sheep would increase the q_xof later age groups.

Net reproductive rate, R₀, is given by

If n₀ = 100 and d₀ = 20, what is q₀?

If N_t = 50 and R₀ =2, N_t+1=

In a life table q_x=

In a life table, q_x is

If n_x = 600 and n_x+1 = 400, what is L_x?

A population increases in size if R₀

If R₀=1 then we say population size is