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What is capture recapture?

What is capture recapture?

Capture-recapture process showing first sample of 50 fish tagged and released, mixed in a pond, then second sample of 40 fish with 5 tagged, labelled M, S and R.

Capture recapture is used when a population is too large or hidden to count directly. You take a first sample, mark it, release it, then later take a second sample and see how many marked individuals are found again.

Capture Recapture Lesson

  1. GCSE
  2. /Maths
  3. /Capture Recapture

Step-by-step lessons on OCR GCSE Maths Capture Recapture. Each one builds up to exam-style questions. Build fluency with number, ratio and algebra first, since geometry, probability and statistics topics rely on them, and leave extra time nearer the exam for Higher-tier problem-solving and multi-step reasoning questions.