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Measuring Populations

Milz , Merp , Sint. Measuring Populations. Direct Observation. Direct observation is when you actually see the animal and count all of them We went to the pet store and counted all the cats. Indirect Observation.

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Measuring Populations

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  1. Milz, Merp, Sint Measuring Populations

  2. Direct Observation • Direct observation is when you actually see the animal and count all of them • We went to the pet store and counted all the cats

  3. Indirect Observation • Indirect observation is when you see the holes from gophers and guess how many there are. • We went to Tanner’s front yard and we counted all the gophers holes and guess how many there was from the holes

  4. Sampling Sampling is whenyou count the amount if something in a selected area and estimate how many more of the whatever you are counting We went to the desert and counted the grains of sand that were in an area that was 1 foot around

  5. Mark and Recapture • When you catch a lot of animals and then you mark them then set them free then you go out and catch them again and see how many have marks • We caught 10 mice marked them with a black dot then 3 weeks later went and caught them again and there was 10 mice with dots 5 dots left

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