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10 Cards in this Set
- Front
- Back
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Max Sustainable yelid
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populations can restore themselves, k/2 max growth rate occurs
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The surplus yield model
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dN/dt = rN(1-(N/k)) - FN, Issue w/ model- doesn’t take age structure or weight into consideration
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Equilibrum yield for max surplus
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FN = rN(1-9N/k))
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They dynamic pool model
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Total yield ,Y = Σ FtNtWt where t= age at 1st recruitment to max age. Pro-incorporstes age structure. Con- lots of estimation, especially for R
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Number of recruits at time t
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Nt = Re-(F+M)t
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F
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fishing mortality (catchability, c times amount of fishing effort, E)
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r
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Instantaneous rate of change
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R
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number of recruits (usually assumed to be constant)
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M
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natural mortality
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W
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Avg weight of fish
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