1.2.1 Investigation- methods
Quarats- considering size, number to sample, position of the quadrats.
Random sampling- used to avoid bias. Random number generation by co ordinates.
Systematic sampling aklong transects- A belt transect to measure the spread of the sample over the length of the area being investigated.
Mark, relaease, recapture- Animals are caught and marked. The number is recorded. The organisms are released and after a given period of time the animals in the same area are caught again. The amount of marked animals to none marked is measure and the popualtion size can be estimated by the following equation.
Estimated population size = (total number of individuals inb the first sample X total number of individuals in the scond sample) / number of marked individuals recaptured.
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