Lecture 7 Sakai

# Lecture 7 Sakai - Lecture 7 September 2010 2010 Field...

This preview shows pages 1–8. Sign up to view the full content.

Lecture 7 Lecture 7 23 23 September September 2010 2010

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Field Metabolic Rate Isotope exchange can be used to measure metabolic rate in unrestrained, free-living animals. Doubly-labeled water: D 2 18 O or 3 H 2 18 O is used to “label” total body water. 18 O is lost as CO 2 and H 2 O D (or 3 H) is lost only as H 2 O The difference between the rate of loss of oxygen and the rate of loss of the hydrogen label is a measure of the rate of CO 2 production, which is a measure of metabolic rate.
Basal Metabolic Rate (BMR) BMR: standardized measure of metabolic rate in endothermic homeotherms Required conditions include: Thermoneutral zone (no metabolic response to external temperature) Fasting (no SDA) Resting (no activity) Non-reproductive

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Standard Metabolic Rate (SMR) SMR: standardized measure of metabolic rate in ectotherms Required conditions include: Fasting (no SDA) Resting (no activity) Non-reproductive SMR is temperature-specific
“Mouse to Elephant” Curve Basal metabolic rate is strongly dependent on body mass; but BMR does not vary linearly with changes in body mass. BMR is related to mass by a power function: Y=aX b

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Length of any side = L Area of any face = A A = L 2 Volume = V V = L 3 A = V 2/3 , a power function of the form Y=aX b Length of any side = 3L Area of any face = A 9L 2 Volume = V = 27L 3 A V 2/3 , a power function of the form: Y X b Introduction to Allometry
y = x 2 R 2 = 1 0 50 100 150 200 250

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 30

Lecture 7 Sakai - Lecture 7 September 2010 2010 Field...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online