Sampling

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  • Created by: Natasha
  • Created on: 28-12-12 08:41

Mark-release-recapture

- Marking method does not harm and does not make organism liable to predation.

Population (lincoln index) = (sample1 × sample2) / Number marked in sample2

-Assumes that population is stable, and there no births/deaths  or emigration/immigration took place between the first and second samples. 

Sampling techniques 

Quadrats 

- To sample different areas 

- Mapping out area into grid selecting using random numbers from tables or computer program, to prevent bias

Transects 

- To measure change from one area to another

Types: 

Interrupted belt transect - taken at intervals along the line 

Continous belt transect

Point transect - just the species touching a particular pont on the line are recorded

Qualitative

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