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What drives dispersal?

What drives dispersal?. Mark Andruskiw. Costs & benefits. Traditional hypotheses:. Competition for resources Competition for mates Inbreeding avoidance. Berteaux and Boutin 2000. Cone abundance:. Population density:. mom. kids. Philopatry vs. dispersal:. Berteaux and Boutin 2000.

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What drives dispersal?

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  1. What drivesdispersal? Mark Andruskiw

  2. Costs & benefits

  3. Traditional hypotheses: • Competition for resources • Competition for mates • Inbreeding avoidance

  4. Berteaux and Boutin 2000

  5. Cone abundance:

  6. Population density:

  7. mom kids Philopatry vs. dispersal: Berteaux and Boutin 2000

  8. Model mom’s decision:

  9. Model mom’s decision: where: Y = mother’s behavior (keep, share, bequeath) X1..Xn = explanatory variables

  10. Model mom’s decision:

  11. Model mom’s decision: Individual level

  12. Model mom’s decision: Individual level Weight by quality Expand neighborhood

  13. Model mom’s decision: Individual level Weight by quality Expand neighborhood

  14. Probability Survival cost:

  15. Model kid’s decision: where: Y = dispersal distance X1..Xn = explanatory variables

  16. Model kid’s decision:

  17. Manipulations: r10 male r2 fem r1 male r4 fem r9 fem r3 male F r8 fem r5 fem r6 fem r7 male

  18. Core squirrel data: • Family information • Paternity • Midden ownership (vacancy, disp. dist) • Cone counts • Seen sheets (predators, alternate prey)

  19. Links to other projects:

  20. Logistic needs: 1 technician 35+ radios 1 telemetry flight (?) 2 receivers

  21. 2005 papers: Nest switching in relation to flea load

  22. 2005 papers: Dad? Kin recognition in red squirrels

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