Lab: Estimating Population Size Problem: What is the estimated number of grasshoppers in a one acre area? Why does it matter? _______________________________________________________ ________________________________________________________________________ _ Hypothesis: It is hypothesized that there are _______ greasshoppers living in the meadow. Experiment: Materials: - - - - - Experiment: 1. Using nets sweep the meadow 3 times. Place collected grasshoppers in a collection jar. 2. Mark grasshoppers with paint 3. Record Number of grasshoppers on data sheet 4. Release grasshoppers to the center of the field 5. Wait ______________days 6. Sweep meadow three times. Place collected grasshoppers in a collection jar. 7. Count Grasshoppers 8. Record total number of grasshoppers and number of marked grasshoppers 9. Release Grasshoppers Data: First Capture date_____ Second Capture date:____ # in First Capture Total in Second Capture Marked in Second Capture P= M (n) / R P= Estimated population M= Grasshoppers in first capture
N= total in second capture, including marked and unmarked R= Number of marked grasshoppers in second capture
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