Mark-Recapture Population Sampling


How many spiders are hiding in the leaf litter?

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.

Assembled kits
Materials to assemble 10 kits - includes all supplies, printed labels, and student instructions copy master

Kit Includes

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

Also Required

(no additional materials  required)

Quantity Discounts


  • 1 – 9 kits: $9.95 each
  • 10 – 24 kits: $9.45 each
  • 25+ kits: $8.96 each


  • 1 – 9 packs: $67.95 each
  • 10+ packs: $64.55 each


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

Correlation to Next Generation Science Standards (NGSS) Shop by NGSS »

Performance Expectations:

HS-LS2-1. Use mathematical and/or computational representations to support explanations of factors that affect carrying capacity of ecosystems at different scales.

  • Science & Engineering Practices

    Developing and Using Models - Develop and/or use a model (including mathematical and computational) to generate data to support explanations, predict phenomena, analyze systems, and/or solve problems

  • Disciplinary Core Ideas

    LS2.A: Interdependent Relationships in Ecosystems - Ecosystems have carrying capacities, which are limits to the numbers of organisms and populations they can support. These limits result from such factors as the availability of living and nonliving resources and from such challenges such as predation, competition, and disease. Organisms would have the capacity to produce populations of great size were it not for the fact that environments and resources are finite. This fundamental tension affects the abundance (number of individuals) of species in any given ecosystem.

  • Crosscutting Concepts

    Scale, Proportion, and Quantity - The significance of a phenomenon is dependent on the scale, proportion, and quantity at which it occurs.