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Measuring Populations. By: KKov Amon Aogd. Direct Observation. Going out and counting each organism individually. Examples: I went out on the Serengeti and counted each Zebra. I n d i r e c t O b s e r v a t i o n.

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Measuring populations

Measuring Populations

By: KKov

Amon

Aogd


Direct observation
Direct Observation

  • Going out and counting each organism individually.

  • Examples: I went out on the Serengeti and counted each Zebra.


I n d i r e c t o b s e r v a t i o n
IndirectObservation

  • You can count how many are in [one lake] and times that by how many [lakes] there are.

  • Example: Count how many hippos are in the bay and times it by all the other bays. (the total amount.)


Sampling
Sampling

  • Making an estimate on how many you guess there are.

  • Example: I think there are 203 giraffes in the savannah.


Mark and recapture
Mark-and-Recapture

  • Herd a bunch of animals, mark them, let them go, herd another group in 2 weeks, look at the ones that are marked, and mark the ones that have not yet been marked.

  • Example: Herd a bunch of lions, mark them, and follow rest as above.