1 / 23

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.

wendy-donovan
Download Presentation

What drives dispersal?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related