6.) Populations can be harvested sustainably Flashcards

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1
Q

how to make harvest/earnings sustainable?

A
  • take interest, not capital (only population growth)

- only take excess production to harvest a population indefinitely

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2
Q

is there a sustainable harvest at k?

A

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

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3
Q

Recruitment failure

A

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

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4
Q

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

A

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

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5
Q

what happens if k or msy fluctuates

A

-can lead to overfishing

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6
Q

Biological problems with MSY

A
  • MSY is estimated with error
  • assumes a constant k and MSY
  • Risk of recruitment failure
  • no such thing as a definite k or msy
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7
Q

economical problems with MSY

A
  • MSY is a biological optimum

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

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8
Q

fisheries: ideal method of fishing

A
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9
Q

bio-economic equilibrium in fishing industry

A
  • the intersection between cost of effort and MSY

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

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