27) Unit 2 - Monitoring Populations and Measuring & Recording Animal Behaviour

Question 1

why do we measure populations

Answer 1

to assess the effects of environmental impacts

Question 2

what can the presence, absence or abundance of an indicator species indicate

Answer 2

give information of environmental qualities such as presence of pollution e.g lichen

Question 3

what is mark and recapture

Answer 3

a method for estimating population size

Question 4

what is the formula for mark and recapture

Answer 4

N = (MC)/R

N=population size to be estimated
M= no* of members captured, tagged and released initially
C=no* of members captured in second sample (recapture)
R=no* of marked members in recapture

Question 5

list 4 assumptions made when using mark and recapture

Answer 5

• all individuals have an equal chance of recapture
• there is no immigration or emigration during sampling time
• there is no birth or death during sampling time
• sampling method used each time is identical

Question 6

Name different methods of marking

Answer 6

• banding
• tagging
• painting
• hair clipping

Question 7

what consideration must be made when tagging

Answer 7

method of marking has to minimise the impact of the species being studied

Question 8

what is ethology

Answer 8

the study of animal behaviour

Question 9

what is an ethogram

Answer 9

a recording of all the observed behaviours shown by the species over a particular period of time e.g. eating, lying down, tail wagging

Question 10

The description of behaviour recorded into the ethogram must be clear, ambiguous and not include ______

Answer 10

anthropomorphism

Question 11

what measurements would a time budget include

Answer 11

Latency - time taken to respond to a stimulus
Frequency - of behaviour/activity
Duration - of behaviour/activity

Question 12

what does using a combination of an ethogram and time budget allow?

Answer 12

allows the behaviour of different individual in a species to be compared