1 / 5

Counting Populations

Counting Populations. By: Vera Colm Johw. Direct Observation. You count all the animals that are in the area. I counted every single fish in the fish tank. Indirect Observation. You count how many holes there are to determine how many organisms live there.

tibor
Download Presentation

Counting Populations

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Counting Populations By: Vera Colm Johw

  2. Direct Observation • You count all the animals that are in the area. • I counted every single fish in the fish tank.

  3. Indirect Observation • You count how many holes there are to determine how many organisms live there. • I counted all the prairie dogs holes and got 128 prairie dogs.

  4. Sampling • Estimating approximately how many organisms you think there are. • I estimate that there are 10,000 deer in the Wasatch Mountiains.

  5. Mark and Recapture • Take organisms and mark them with something, then come back later, and check how many are marked an how many aren’t. • I found a couple of cows while trying to find out how many cows there are on my uncles ranch. I marked 5 with a red dot, then came back a week later and counted how many didn’t have red dots.

More Related