Sampling Using Traps

Question 0

The trap can be baited with

Answer 0

Food the animal likes and can contain dry grass for bedding to ensure its survival whilst in the trap.

Question 1

Traps can be positioned in appropriate places if a

Answer 1

Good knowledge of the animal is known, such as it’s feeding preferences and movement patterns.

Question 2

Provides information on the

Answer 2

Variety of species present and the relative sizes of population.

Question 3

The best estimates of population sizes comes from the mark-release-recapture method, this involves

Answer 3

Capturing the animals, marking them, releasing them and then recapturing a proportion of them later.

Question 4

The fraction of recaptured animals allows

Answer 4

An estimate to be made of the size of the population. Can also give information about the distance travelled by an animal is it is recaptured in a different location.

Question 5

Formula to estimate the total number of individuals:

Answer 5

T = (N1 x N2) / M2

N1 - number of individuals caught and marked on first occasion.
N2 - number of individuals caught on second occasion.
M2 - number of marked individuals caught on second occasion.