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Life Tables

Life Tables. Ricklefs & Miller (1999) Ecology Age Structure Stable Age Distribution Life Table: Environmental Dependence. Stable Age Distribution. Vital Rates & Environment. Experimental Population Dynamics.

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Life Tables

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  1. Life Tables Ricklefs & Miller (1999) Ecology Age Structure Stable Age Distribution Life Table: Environmental Dependence

  2. Stable Age Distribution

  3. Vital Rates & Environment

  4. Experimental Population Dynamics Costantino et al. 1995. Experimentally induced transitions in the dynamic behaviour of insect populations. Nature 375:227. Flour beetle Tribolium castaneum Manipulate Adult Mortality: Bifurcation

  5. Flour beetles Grown in ½ pint milk bottles Change media (food) every 2 weeks Census all stages Add or remove adults: mortality rate

  6. Flour beetles Multiple stages: egg, larvae, pupae, callow adults, mature adults Consume media & cannibalism Larvae & adults eat eggs Adults eat pupae

  7. Dynamics (Skeleton) Lt Feeding Larvae, time t Pt Pupae, time t At Mature Adults, time t (t + 1): 2 weeks later

  8. Dynamics b larvae per adult before cannibalism cij cannibalism of stage j on stage I j mortality of stage j

  9. Stability boundaries, 3 genetic strains

  10. Stability boundaries, 2 test genetic strains

  11. Experimental results, RR strain

  12. Experimental results, SS strain

  13. Experimental Population Dynamics Costantino et al. 1995. Experimentally induced transitions in the dynamic behaviour of insect populations. Nature 375:227. Dynamics Bifurcate as Model Predicts

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