Animal Energetics

Question 1

What is basal metabolic rate (BMR)?

Answer 1

Rate of energy expended by a: 
Resting 
Post absorptive 
Adult animal
Within its thermoneutral range 

The minimum energy used by an animal to maintain its body structure/exist

Question 2

What is BMR usually confined to and why?

Answer 2

Mammals and birds because some animals don’t have a thermoneutral range

Question 3

What is standard metabolic rate?

Answer 3

Rate of energy expended by a resting, post absorptive animal at a given body temperature

Question 4

What is resting metabolic rate?

Answer 4

Rate of energy expended by a resting animal of unknown absorptive state

Question 5

What is field metabolic rate?

Answer 5

Rate of energy expended by a free living animal at any given time- so if it’s resting FMR will be the same as RMR

Question 6

What is the average daily metabolic rate? (ADMR)

Answer 6

Average rate of energy expenditure over an entire day (24h) regardless of activity level

Question 7

What is direct calorimetry?

Answer 7

It measures the energy that is being produced in the form of heat

Question 8

What is indirect calorimetry?

Answer 8

Measurement from food intake and waste excretion

Respirometry

Question 9

Who first used direct calorimetry and what on?

Answer 9

It was first used by Lavoisier and Laplace to measure the heat production of a guinea pig

Question 10

What does respirometry measure?

Answer 10

The amount of oxygen used in all oxidative processes of an animal

Assumes no anaerobic metabolism

Can be portable and taken to the field

Question 11

What has a higher energy density than carbohydrates and proteins?

Answer 11

Fat

Question 12

What is the percentage of error when using carbon dioxide to measure metabolic rate compared to oxygen?

Answer 12

54% error in co2

14% error in oxygen

Question 13

Why is there an error in estimating metabolic rate using carbon dioxide?

Answer 13

Animals could be metabolising fat but you think it is metabolising carbohydrates