Mark-Recapture Population Sampling

Catalog #STO-111

How many spiders are hiding in the leaf litter?

Time To Complete Time to complete: One 40-minute class period + homework

How many plastic spiders are hiding in simulated “leaf litter”? Use the mark-recapture population sampling technique to estimate the number of organisms in a population.

  • Capture, mark and release a random sample of spider in your "leaf litter".
  • Recapture a second random sample of spiders and use a mathematical equation to estimate the total number of animals in the population.
Teacher Guide Know Before You Buy! Download Teacher Guide

Limit 1 free sample per customer

Quantity Price
1 - 9$9.73 ea.
10 - 24$9.25 ea.
25 - 1000$8.76 ea.

Each assembled kit contains:

  • Student instructions
  • 1 bag containing small plastic spiders and paper shreds
  • 10 dot stickers
  • 1 clip

Also required: (no additional materials required)

Buy Unassembled and Save!

Mark-Recapture Population Sampling – Pack of 10 Unassembled Kits

Catalog # STO-111U

Unassembled packs contain materials for 10 kits.

  • All supplies, lab materials, and printed labels
  • Student instructions copy master
  • Easy to follow instructions for kit assembly
Quantity Price
1 - 9$64.89 ea.
10 - 1000$61.65 ea.

This kit does not require refills since all its contents are reusable.

Teacher Testimonial

The kits are great. I actually use them in my college courses!

- College biology teacher (AL)

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STO-111