# Investigating populations

Process of random sampling with quadrats
Lay out 2 tape measures at right angles along 2 sides of area - obtain co ordinates randomly - place quadrat at intersection of each pair of coordinates
1 of 5
Process of using a transect
Tape stretched across ground in straight line - organisms that cross over are recorded
2 of 5
What are the 2 ways we measure abundance?
Frequency & Percentage cover
3 of 5
Describe how you would carry out the mark-release-recapture technique?
Capture sample - mark & release again - mark the fish using a highlighter (not harmful) - take a second sample and count - use equation
4 of 5
What is the equation for mark-release-recapture?
Number in sample 1 x number in sample 2 divided by number marked in sample 2
5 of 5

## Other cards in this set

### Card 2

#### Front

Process of using a transect

#### Back

Tape stretched across ground in straight line - organisms that cross over are recorded

### Card 3

#### Front

What are the 2 ways we measure abundance?

### Card 4

#### Front

Describe how you would carry out the mark-release-recapture technique?

### Card 5

#### Front

What is the equation for mark-release-recapture?