Part 2

Question 1

Define Life Tables

Answer 1

age-specific mortality schedule of a population.

Question 2

Who were Life Tables developed by?

Answer 2

human demographers working for insurance companies

Question 3

What are the two types of life tables

Answer 3

1) Cohort life table
2) Static life tables

Question 4

Define Cohort life tables

Answer 4

based on following a cohort throughout life.
(follow a group from life to death)

Question 5

what column is used to construct a “survivorship curve”

Answer 5

n sub x

Question 6

Define Type 1

Answer 6

low mortality for most of life
ex. people

Question 7

Define Type 2

Answer 7

constant rate of mortality
ex. small mammals

Question 8

Define Type 3

Answer 8

high mortality, early in life
ex. invertebrates

Question 9

Define static life tables

Answer 9

calculated from cross section of a population at specific time

Question 10

What are the three types of data Ecologists use for non-human life tables

Answer 10

1) survivorship directly observed
2) age at death observed
3) age structure directly observed