Sustainable Use Of Wildlife

Question 1

H

Answer 1

Harvest rate

Question 2

Assumptions that H could be

Answer 2

H could be

a constant number
a constant proportion

Question 3

Horizontal line means

Answer 3

Constant number of individuals being harvested (taken away)

Question 4

Diagonal line

Answer 4

Constant proportion of individuals being taken away

Question 5

H3

Answer 5

Unsustainable harvest rate because taking away for more individuals than are being produced in any year (would was to catastrophic decline)

Question 6

Negative feedback of sensory dependence gives the fuel to take a sustainable harvest

Answer 6

X

Question 7

MSY

Answer 7

Max sustainable yield

Question 8

What is harvesting effort?

Answer 8

H =

H (number killed) is a function of (q) effort(E) and population size(N)

Question 9

How to increase number of animals killed

Answer 9

Increase effort

Increase size of pool from which you are taking individuals

Question 10

How do we get an expression for yield?

Answer 10

H as a function of effort and

Question 11

Yield Effort Curve

Answer 11

Yoel in terms of number of animals is a function of harvesting effort

Question 12

Lobster yield effort curve

Answer 12

• more variability at higher effort (less perfect fit cos dots are not as close to the line)
• no data and very high effort (dotted line)

Question 13

Priorities for managers

Answer 13

Stability of yield

Size of yield

Question 14

Dollar

Answer 14

Animal x cost per animal

Question 15

X

Answer 15

As you put more harvesting effort in the cost goes up

Question 16

When effort is zero

Answer 16

Population size is carrying capacity

Question 17

Total cost curve is flat means

Answer 17

It’s cheap to harvest