Biology Figures

Predator–prey graph worksheet: find the lag and period

An example figure from the Predator–Prey Cycles generator.

Black and white graph of rabbits (solid line, left axis 0 to 1000) and foxes (dashed line, right axis 0 to 100) over 20 years, with arrows labeled “Lag:” and “Period:” followed by blank lines
Rabbits (solid line) and red foxes (dashed line) over 20 years, in black and white, with rabbits counted on the left axis and foxes on the right. One arrow spans from a rabbit peak to the fox peak after it and another from one rabbit peak to the next, labeled “Lag:” and “Period:” with blank lines for students to fill in from the time axis.
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Answer key

  • Period: a cycle every 5 years
  • Lag: the foxes peak 0.9 years after the rabbits
  • Rabbits: 186 to 737, averaging 400
  • Foxes: 18.6 to 73.7, averaging 40

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