Investigating populations Flashcards
1
Q
How do you remove bias from a sampling investigation?
A
Use an random number generator
2
Q
Why should you take a large number of samples?
A
To calculate a mean
To be representative of the whole population
3
Q
What does the mark-release-recapture method measure?
A
The abundance of more motile species
4
Q
What calculation is used during mark-release-recapture?
A
total population size = (number caught in 1st sample x number caught in 2nd sample) / number marked in second sample
5
Q
What assumptions do you have to make when using the mark-release-recapture method?
A
Marked sample have had enough time & opportunity to mix with population
Marking hasn’t affected chances of survival
No change in population size
