Costs of locomotion

Question 1

Define metabolic cost of locomotion

Answer 1

• amount of energy required (beyond basal needs at rest) to move animal a unit of distance

Question 2

What is metabolic cost expressed as (units)

Answer 2

Kcalkg-1km-1
OR
litres of O2kg-1km-1

Question 3

How is metabolic cost measured

Answer 3

• using swim tunnels (respirometers)

Question 4

What is a respirometer

Answer 4

• treadmill for fish
• water velocity (m/s)
• distance

Question 5

What does respirometer do?

Answer 5

• measures O2 in water in a CLOSED SYSTEM

Question 6

How is the slope of a respirometer measured?

Answer 6

• O2 conc * rate

Question 7

What does the slope of a respirometer mean?

Answer 7

• oxygen consumption and performance indicator

Question 8

O2 consumption ____ with swimming speed

Answer 8

• increases

Question 9

What is SMR?

Answer 9

standard metabolic rate

Question 10

How do you calculate SMR

Answer 10

resting MR / basal MR

Question 11

What is ucrit?

Answer 11

• performance indicator
• critical swimming speed

Question 12

What is critical swimming speed?

Answer 12

• max sustainable swimming speed before fatigue

Question 13

MR ___ with swimming speed

Answer 13

• Increases

Question 14

What does restless behaviour relate to?

Answer 14

• spontaneous movement

Question 15

How do you estimate SMR?

Answer 15

• extrapolate graphs to 0 (resting)

Question 16

What is cost of transport?

Answer 16

• O2 consumed when moving 1kg of mass over 1km distance

Question 17

What does mass specific metabolic rate mean?

Answer 17

• costs per unit weight decrease with larger body sizes

Question 18

How do you calculate volume of oxygen consumption rate?

Answer 18

.
V(ml(o2) * kg-1 * h-1/km-1)

Question 19

What does “.” mean over a sign

Answer 19

• rate

Question 20

How do you calculate the mass of oxygen consumption rate?

Answer 20

.
m(o2) (MG(o2) * kg-1 * h-1 / km-1)

Question 21

What is the difference in calculating oxygen consumption volume vs mass?

Answer 21

• ml vs mg

Question 22

What does kg-1 mean?

Answer 22

• mass

Question 23

What does h-1 mean?

Answer 23

• time

Question 24

What does km-1 mean?

Answer 24

• distance

Question 25

cost of swimming in larger massed SALMON is ____

Answer 25

less expensive