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Many decades, huge area – spatially and t emporally extensive cycling

Many decades, huge area – spatially and t emporally extensive cycling. More direct data on population density (not simply the harvest data). The data align well with Lotka-Volterra Predator-Prey M odel predictions. But might in reality be m ore complicated than LV model…. Abundance

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Many decades, huge area – spatially and t emporally extensive cycling

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  1. Many decades, huge area – spatially and temporally extensive cycling

  2. More direct data on population density (not simply the harvest data)

  3. The data align well with Lotka-Volterra Predator-Prey Model predictions

  4. But might in reality be more complicated than LV model… Abundance (Biomass) 0 5 10 Year

  5. Experiment in decline phase of cycle with food supplementation and control.

  6. Effects of predator exclusion and food Supplementation on ADULT SURVIVAL

  7. Effects of food supplementation and predator exclusion on REPRODUCTION

  8. The data confirm that this is largely a single predator – single prey cycle (with minor complications) ~2 hare kills per 3 days at peak of cycle

  9. Generalist predator • Prey switching in decline phase of prey • Decouple the dynamics of predator and prey – breaks down LV cycles

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