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Post doc project

Post doc project. links between physiology, behaviour, and life history ecological implications of physiology physiological mechanisms of ecology. Community Ecology. Population Ecology. Life History. Behaviour. Physiology. Cell Biology. Molecular Biology. Basic design.

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Post doc project

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  1. Post doc project • links between physiology, behaviour, and life history • ecological implications of physiology • physiological mechanisms of ecology

  2. Community Ecology Population Ecology Life History Behaviour Physiology Cell Biology Molecular Biology

  3. Basic design • natural and experimentally-induced variation in autumn hoard size • winter behaviour and metabolism • spring behaviour and metabolism • reproductive success

  4. a) Metabolic requirements of foraging in a cold environment • reduced hoard size increases cold exposure • increases thermogenic requirements • increased Summit MR – FMR – RMR in winter

  5. b) Links between RMR, FMR, and SMR • repeated winter and reproductive metabolic measurements • quantified and experimentally manipulated food availability

  6. d) Metabolic consequences of early reproduction • timing of parturition important • natural (and experimentally induced?) variation in parturition date • predict early breeders have higher FMR (and RMR?), lower production efficiency, but higher RS

  7. Community Ecology Population Ecology Life History Behaviour Physiology Cell Biology Molecular Biology

  8. I. Autumn Hoarding Behaviour

  9. Autumn 2001 Hoarding Observations SU/KL Cone Count = 19.5 Average = 1170 Number of Individuals Estimated Number of Cones Hoarded

  10. Autumn 2002 Hoarding Observations SU/KL Cone Count = 35.0 Average = 5020 Number of Individuals Estimated Number of Cones Hoarded

  11. Autumn 2003 Hoarding Observations SU/KL Cone Count = 9 Average = 5020 Number of Individuals Estimated Number of Cones Hoarded

  12. Hoarding Functional Response Estimated Number of Cones Hoarded Number of Cones per Tree

  13. Juveniles (avg= 2950) Ad. Females (avg= 5020) Ad. Males (avg= 8645) Within Year Variation by Age and Sex Class Autumn 2002 Hoarding Observations SU/KL Cone Count = 35.0 Number of Individuals Estimated Number of Cones Hoarded

  14. Scatterhoarding vs. Larderhoarding Proportion of Cones Hoarded to 1o Midden

  15. Mushrooms/Truffles vs. Cones Number of Individuals Frequency of Mushroom/Truffle Hoarding (proportion of total # of hoarded items)

  16. Midden Surface Cone Counts 2001 2002

  17. Midden Surface Cone Counts 2001 & 2002 Combined r2 = 0.32, p < 0.001

  18. II. Winter & Reproductive Energetics

  19. Winter Resting Metabolic Rate (RMR) n = 36, r2 = 0.11, p = 0.047 Winter Resting Metabolic Rate (kJ/day) Body Mass (g)

  20. Winter Resting Metabolic Rate (RMR) Winter Resting Metabolic Rate (kJ/day) Avg = 140 kJ/day

  21. p = 0.23 Winter Resting Metabolic Rate (RMR)

  22. Winter Field Metabolic Rate (FMR or DEE) n = 51, r2 = 0.190, p = 0.001 Winter Daily Energy Expenditure (kJ/day) Body Mass (g)

  23. Winter Field Metabolic Rate (FMR or DEE) Winter Daily Energy Expenditure (kJ/day) Avg = 200 kJ/day

  24. Winter FMR vs. Winter RMR n = 28, r= 0.012, p = 0.95 Winter FMR (kJ/day) Winter RMR (kJ/day)

  25. Winter FMR vs. Winter RMR Winter Daily Energy Expenditure (x RMR) Avg = 1.45xRMR

  26. Winter FMR and Lactating FMR Daily Energy Expenditure (kJ/day)

  27. Lactating FMR n = 46, r= 0.001, p = 0.94 Lactating Daily Energy Expenditure (kJ/day) Body Mass (g)

  28. Lactating FMR Lactating Daily Energy Expenditure (kJ/day)

  29. Lactating FMR Lactating Daily Energy Expenditure (kJ/day)

  30. FMR Summary Daily Energy Expenditure (kJ/day) LL Food Add KL/SU Control LL Control

  31. Source Sum-of-Squares df Mean-Square F-ratio P SEASON 278658.157 1 278658.157 42.328 0.000 TREAT 32509.834 2 16254.917 2.469 0.090 SEASON*TREAT 63555.514 2 31777.757 4.827 0.010 BODYMASS 4225.126 1 4225.126 0.642 0.425 Error 592497.575 90 6583.306 Daily Energy Expenditure (kJ/day) LL Food Add KL/SU Control LL Control

  32. FMR Summary 1994 Control (following mast year) Daily Energy Expenditure (kJ/day) LL Food Add KL/SU Control LL Control

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