B6.1.2 - Sampling Techniques 2

Question 1

What technique scales up results from small scale samples to estimate population?

Answer 1

Capture - Recapture

Question 2

What are the steps of the capture - recapture technique?

Answer 2

Capture organisms from a sample area
Mark these organisms and then release them
Later, recapture organisms from the same sample area
Record the number of marked and unmarked organisms
Estimate the population size

Question 3

What is the equation used to estimate population size?

Answer 3

(First sample size X second sample size)

/ number of recaptured marked individuals

Question 4

What is random sampling?

Answer 4

Sampling on areas which are chosen on a random basis with no bias

Question 5

What is a transect?

Answer 5

A line across a sample area

Question 6

Why might you use non random sampling?

Answer 6

To study the distribution of organisms across different parts of an area

Question 7

Is it better to have random sampling or non random sampling when looking to find the population of a given area?

Answer 7

Random sampling