324
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0.05
d:
14. Dynamics of Multiple Fish Species
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6
20 o
2010
Year
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---i
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FIGURE 14.4 . Relative size of age cohorts of cod in region 1 (numbers on curves correspond to age classes 6 to 10) at 3% annual technological improvement.
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3: 0.90
2000
2010
2020
2030
Year
FIGURE 14.5. Relative size of cod (1), haddock (2), and pollack (3) populations on
Georges Bank as a fraction of total spawning stock biomass under the assumption of
a 10% annual reduction of effort from 1995 to 2000 and 3% annual technological
improvement.