4/12/24 - Lecture 8: Population Growth 2

Question 1

Survivorship (lx)

Answer 1

Proportion of individuals surviving to age x

(This is a lowercase L sub x)

Question 2

Direct method to find survivorship

Answer 2

Following a cohort of individuals over time

Question 3

Cohort

Answer 3

A group of individuals born around the same time

Question 4

Indirect method to find survivorship

Answer 4

Determine the age of death from remains

Question 5

What is a type III survivorship curve?

Answer 5

High juvenile mortality but low adult mortality (for example, a big tree)

Question 6

What is a type II survivorship curve?

Answer 6

Mortality independent of age

Question 7

What is a type I survivorship curve?

Answer 7

Low mortality until the later stages of life

Question 8

How does Type I and III life expectancy change with age?

Answer 8

Type III survivorship increases with age, and Type I survivorship decreases with age

Question 9

Net reproductive number R0 (R sub 0)

Answer 9

Average number of offspring produced by an individual in its lifetime

Question 10

mx for life tables

Answer 10

Average number of offspring produced at a certain age