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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


Post doc project

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


Post doc project

Community Ecology

Population Ecology

Life History

Behaviour

Physiology

Cell Biology

Molecular Biology


Post doc project

I. Autumn Hoarding Behaviour


Post doc project

Autumn 2001 Hoarding Observations

SU/KL Cone Count = 19.5

Average = 1170

Number

of

Individuals

Estimated Number of Cones Hoarded


Post doc project

Autumn 2002 Hoarding Observations

SU/KL Cone Count = 35.0

Average = 5020

Number

of

Individuals

Estimated Number of Cones Hoarded


Post doc project

Autumn 2003 Hoarding Observations

SU/KL Cone Count = 9

Average = 5020

Number

of

Individuals

Estimated Number of Cones Hoarded


Post doc project

Hoarding Functional Response

Estimated Number

of

Cones Hoarded

Number of Cones per Tree


Post doc project

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


Post doc project

Scatterhoarding vs. Larderhoarding

Proportion of

Cones Hoarded

to 1o Midden


Post doc project

Mushrooms/Truffles vs. Cones

Number

of

Individuals

Frequency of Mushroom/Truffle Hoarding

(proportion of total # of hoarded items)


Post doc project

Midden Surface Cone Counts

2001

2002


Post doc project

Midden Surface Cone Counts

2001 & 2002 Combined

r2 = 0.32, p < 0.001


Post doc project

II. Winter & Reproductive Energetics


Post doc project

Winter Resting Metabolic Rate (RMR)

n = 36, r2 = 0.11, p = 0.047

Winter

Resting

Metabolic

Rate

(kJ/day)

Body Mass (g)


Post doc project

Winter Resting Metabolic Rate (RMR)

Winter

Resting

Metabolic

Rate

(kJ/day)

Avg =

140 kJ/day


Post doc project

p = 0.23

Winter Resting Metabolic Rate (RMR)


Post doc project

Winter Field Metabolic Rate (FMR or DEE)

n = 51, r2 = 0.190, p = 0.001

Winter

Daily

Energy

Expenditure

(kJ/day)

Body Mass (g)


Post doc project

Winter Field Metabolic Rate (FMR or DEE)

Winter

Daily

Energy

Expenditure

(kJ/day)

Avg =

200 kJ/day


Post doc project

Winter FMR vs. Winter RMR

n = 28, r= 0.012, p = 0.95

Winter

FMR

(kJ/day)

Winter RMR (kJ/day)


Post doc project

Winter FMR vs. Winter RMR

Winter

Daily

Energy

Expenditure

(x RMR)

Avg =

1.45xRMR


Post doc project

Winter FMR and Lactating FMR

Daily

Energy

Expenditure

(kJ/day)


Post doc project

Lactating FMR

n = 46, r= 0.001, p = 0.94

Lactating

Daily

Energy

Expenditure

(kJ/day)

Body Mass (g)


Post doc project

Lactating FMR

Lactating

Daily

Energy

Expenditure

(kJ/day)


Post doc project

Lactating FMR

Lactating

Daily

Energy

Expenditure

(kJ/day)


Post doc project

FMR Summary

Daily

Energy

Expenditure

(kJ/day)

LL Food Add

KL/SU Control

LL Control


Post doc project

SourceSum-of-SquaresdfMean-SquareF-ratioP

SEASON278658.1571278658.15742.3280.000

TREAT32509.834216254.9172.4690.090

SEASON*TREAT63555.514231777.7574.8270.010

BODYMASS4225.12614225.1260.6420.425

Error592497.575906583.306

Daily

Energy

Expenditure

(kJ/day)

LL Food Add

KL/SU Control

LL Control


Post doc project

FMR Summary

1994 Control (following mast year)

Daily

Energy

Expenditure

(kJ/day)

LL Food Add

KL/SU Control

LL Control


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