Mark and Recapture Quadrat Sampling

Mr Richards wants to estimate population size for crabs on Destin Beach. She uses 2 quadrats and counts 11 crabs in the first and 7 crabs in the second. What is the average # of crabs per quadrat?

• 7

• 11

• 9

• 18

Mr Richards wants to estimate population size for crabs on Destin Beach. She uses 2 quadrats and counts 11 crabs in the first and 7 crabs in the second. The quadrats are 2ft². What information does she need to estimate the population size?

• How many quadrats there are

• How many crabs are in a third quadrat

• The area of a quadrat

• The area of the beach

Mr Richards wants to estimate population size for crabs on Destin Beach. She uses 2 quadrats and counts 11 crabs in the first and 7 crabs in the second. The quadrats are 2ft². The area of the beach is 20ft². What is the estimated population size of crabs?

• 360

• 90

• 18

• 9

How do you calculate area?

• LengthxWidth

• LengthxDensity

• Length/Density

• Length + Density

Which of the organisms would NOT be good to do quadrat sampling on?

• Bush Honeysuckle

• Rollie Pollies

• Beetles

• Wolves

Ten 1m² quadrats were placed in a 40m² field. On average 2 snails were found in every quadrat. Estimate the population size of the whole field.

• 2

• 10

• 40

• 80

• 20

Tags

NGSS.MS-LS2-1

Which of the following is true about quadrats?

• quadrats should be use on organisms that don't move or move really slowly

• quadrats are square shaped

• the results are more reliable when you look at the results from many quadrats

• All the above are true

These four 1m² squared quadrats were place in a 9m² garden. Estimate the total population of flowers in the whole garden.

• 18

• 17

• 9

• 21

• 12

Tags

NGSS.MS-LS2-1

The number of species in a given area or population size.

• Quadrat

• Species Richness

• Speciation

• Menhinick Index

The number of species divided by the square root of the total number of individuals

• Abundance

• Quadrat

• Menhinick Index

• Speciation