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Many decades, huge area – spatially and t emporally extensive cycling - PowerPoint PPT Presentation


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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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Presentation Transcript
slide6

Many decades, huge area – spatially and

temporally extensive cycling

slide9

But might in reality be

more complicated than

LV model…

Abundance

(Biomass)

0 5 10

Year

slide11

Effects of predator exclusion and food

Supplementation on ADULT SURVIVAL

slide12

Effects of food supplementation and

predator exclusion on REPRODUCTION

slide13

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

slide14

Generalist predator

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