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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
Post doc project
  • links between physiology, behaviour, and life history
  • ecological implications of physiology
  • physiological mechanisms of ecology
slide2

Community Ecology

Population Ecology

Life History

Behaviour

Physiology

Cell Biology

Molecular Biology

basic design
Basic design
  • natural and experimentally-induced variation in autumn hoard size
  • winter behaviour and metabolism
  • spring behaviour and metabolism
  • reproductive success
a metabolic requirements of foraging in a cold environment
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
b links between rmr fmr and smr
b) Links between RMR, FMR, and SMR
  • repeated winter and reproductive metabolic measurements
  • quantified and experimentally manipulated food availability
d metabolic consequences of early reproduction
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
slide7

Community Ecology

Population Ecology

Life History

Behaviour

Physiology

Cell Biology

Molecular Biology

slide9

Autumn 2001 Hoarding Observations

SU/KL Cone Count = 19.5

Average = 1170

Number

of

Individuals

Estimated Number of Cones Hoarded

slide10

Autumn 2002 Hoarding Observations

SU/KL Cone Count = 35.0

Average = 5020

Number

of

Individuals

Estimated Number of Cones Hoarded

slide11

Autumn 2003 Hoarding Observations

SU/KL Cone Count = 9

Average = 5020

Number

of

Individuals

Estimated Number of Cones Hoarded

slide12

Hoarding Functional Response

Estimated Number

of

Cones Hoarded

Number of Cones per Tree

slide13

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

slide14

Scatterhoarding vs. Larderhoarding

Proportion of

Cones Hoarded

to 1o Midden

slide15

Mushrooms/Truffles vs. Cones

Number

of

Individuals

Frequency of Mushroom/Truffle Hoarding

(proportion of total # of hoarded items)

slide17

Midden Surface Cone Counts

2001 & 2002 Combined

r2 = 0.32, p < 0.001

slide19

Winter Resting Metabolic Rate (RMR)

n = 36, r2 = 0.11, p = 0.047

Winter

Resting

Metabolic

Rate

(kJ/day)

Body Mass (g)

slide20

Winter Resting Metabolic Rate (RMR)

Winter

Resting

Metabolic

Rate

(kJ/day)

Avg =

140 kJ/day

slide21

p = 0.23

Winter Resting Metabolic Rate (RMR)

slide22

Winter Field Metabolic Rate (FMR or DEE)

n = 51, r2 = 0.190, p = 0.001

Winter

Daily

Energy

Expenditure

(kJ/day)

Body Mass (g)

slide23

Winter Field Metabolic Rate (FMR or DEE)

Winter

Daily

Energy

Expenditure

(kJ/day)

Avg =

200 kJ/day

slide24

Winter FMR vs. Winter RMR

n = 28, r= 0.012, p = 0.95

Winter

FMR

(kJ/day)

Winter RMR (kJ/day)

slide25

Winter FMR vs. Winter RMR

Winter

Daily

Energy

Expenditure

(x RMR)

Avg =

1.45xRMR

slide26

Winter FMR and Lactating FMR

Daily

Energy

Expenditure

(kJ/day)

slide27

Lactating FMR

n = 46, r= 0.001, p = 0.94

Lactating

Daily

Energy

Expenditure

(kJ/day)

Body Mass (g)

slide28

Lactating FMR

Lactating

Daily

Energy

Expenditure

(kJ/day)

slide29

Lactating FMR

Lactating

Daily

Energy

Expenditure

(kJ/day)

slide30

FMR Summary

Daily

Energy

Expenditure

(kJ/day)

LL Food Add

KL/SU Control

LL Control

slide31

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

slide32

FMR Summary

1994 Control (following mast year)

Daily

Energy

Expenditure

(kJ/day)

LL Food Add

KL/SU Control

LL Control

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