6.) Populations can be harvested sustainably

Question 1

how to make harvest/earnings sustainable?

Answer 1

• take interest, not capital (only population growth)

- only take excess production to harvest a population indefinitely

Question 2

is there a sustainable harvest at k?

Answer 2

no, the population must be harvested to reduce n below k, which then responds in more offspring, low mortality, faster growth
-take less than msy

Question 3

Recruitment failure

Answer 3

when more of a population is harvested than there are, not enough new fish are produced

Question 4

why is the population stable to the right of the curve?

Answer 4

-can handle minor miscalculations if over/under harvested, self-regulating.

Question 5

what happens if k or msy fluctuates

Answer 5

-can lead to overfishing

Question 6

Biological problems with MSY

Answer 6

• MSY is estimated with error
• assumes a constant k and MSY
• Risk of recruitment failure
• no such thing as a definite k or msy

Question 7

economical problems with MSY

Answer 7

• MSY is a biological optimum

- bad for industry–max economic yield is the economic optimum

Question 8

fisheries: ideal method of fishing

Question 9

bio-economic equilibrium in fishing industry

Answer 9

• the intersection between cost of effort and MSY

- the point when cost of effort is high and catch is down, stock overfished