Update for Snake River Spring/Summer Chinook ESUs - PowerPoint PPT Presentation

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Update for Snake River Spring/Summer Chinook ESUs. Major Revisions. Addition of new, recently available data for spring/summer chinook index stocks (updates through 1999 return year, 1994 brood year)

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Update for Snake River Spring/Summer Chinook ESUs

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Update for snake river spring summer chinook esus l.jpg

Update for Snake River Spring/Summer Chinook ESUs


Major revisions l.jpg

Major Revisions

  • Addition of new, recently available data for spring/summer chinook index stocks (updates through 1999 return year, 1994 brood year)

  • Incorporation of smolt-to-adult return estimates into calculation of se (estuarine and early ocean survival)


Lambda is much worse l.jpg

Lambda is Much Worse


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Combinations of Actions Will Be Necessary

  • Regardless of hydropower options chosen, we MUST explore other opportunities to increase rate of population change.

  • Dam breaching becomes less likely to be sufficient to mitigate extinction risk, but more likely to be necessary.

  • As situation(s) worsen(s), options become necessities.


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