1.2 Investigating populations

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The number of individuals of a species in a given space
Abundance
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Sampling device used for transitionary populations
Point quadrat
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Type of sampling used with point quadrats
Systematic sampling
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Why does sampling (normally) need to be random?
To avoid bias in collecting data, so the data is valid
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Mark-release-recapture equation
pop size = no. 1st sample, times no. 2nd sample, divided by no. marked individuals recaptured
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Why are mark-release-recapture techniques used?
As animals usually are mobile and move away when approached, and hard to find.
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How reduce impact of fieldwork on a community?
Study in situ, return all study subjects immediately, time between studies, reduce damage to habitat.
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Card 2

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Sampling device used for transitionary populations

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Point quadrat

Card 3

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Type of sampling used with point quadrats

Back

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Card 4

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Why does sampling (normally) need to be random?

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Card 5

Front

Mark-release-recapture equation

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