KA 1: field techniques for biologists: monitoring populations Flashcards

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1
Q

what can give info of environmental qualities, such a presence of a pollutant?

A

presence, absence or abundance of indicator species

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2
Q

what can be used to monitor an ecosystem?

A

susceptible and favoured species

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3
Q

what does the absence or reduced population indicate about a species?

A

-its susceptible to some factor in the environment

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4
Q

what does the abundance or increased population of a species indicate?

A

its favoured by the conditions

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5
Q

the formula for procedure for the mark and recapture technique as a method for estimating population size is:

A

N= MC/R

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6
Q

explain each letter in the N=MC/R formula

A

M=NO. in first capture

C= NO. in second capture

R= NO. marked in second recapture

N= population estimate

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7
Q

what does the method N=MC/R assume?

A

-all individuals have an equal chance of capture

-there is no immigration or emigration

-individuals that are marked and released can
mix fully and randomly with the total population

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8
Q

list methods of marking animals

A

-banding

-tagging

-surgical implantation

-painting

-hair clipping

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9
Q

the method of marking and subsequent observation must…

A

minimise the impact on the study species

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