Human Demographics and Survivorship Lab

Question 1

Describe how human mortality and survivorship have changed in the past 200 years

Answer 1

Human mortality has decreased

Survivorship has increased, people are living longer

Question 2

Know the four factors that determine the size of a population

Answer 2

Birth, death, immigration, and emigration

Question 3

Be able to identify 3 types of survivorship strategies from a graph

Answer 3

Type I Survivorship- probability of survivorship is fairly high at birth (humans)

Type II Survivorship- more linear (some species of lizards)

Type III Survivorship- high initial mortality (typical of many fish)

Question 4

How does life expectancy and increased health affect population growth?

Answer 4

Population is increased because life expectancy is increased, less people are dying.

Question 5

Explain what a survivorship curve is

Answer 5

A graphical representation of the likelihood that an individual will survive from birth to a particular age