Please be advised that the Near Final spawning ground escapement estimates for 2009 have been posted on the Fraser Sockeye escapement website. There are five tables in the posted summary, one for the total watershed escapement and one each for the four run timing components. The estimates can be viewed by scrolling to the bottom of the Near Final Escapement Estimates page and selecting either the HTML or PDF format report.

The Near Final estimates are based on data that have been verified for accuracy, tested for bias (mark-recapture studies) and corrected for age (adult/jack) composition. Changes between the 2009 Preliminary and Near Final estimates by run timing component are highlighted below:

Early Stuart: The Near Final spawning escapement decreases by 30 spawners from the Preliminary estimate.  Spawning success for the aggregate remains essentially unchanged at 94.9%.

Early Summer Run: The Near Final spawning escapement estimate decreases by 9,304 spawners from the Preliminary estimate.  The difference is largely the net result of changes in the spawner estimates at Nadina River (+1,286) and Upper Pitt River (-10,644) following data verification and adjustments to address biases in the Upper Pitt mark-recapture study.  Spawning success for the Early Summer run aggregate remains essentially unchanged at 95.3%.

Summer Run: The Near Final spawning escapement decreases by 694 spawners from the Preliminary estimate.  Spawning success for the Summer Run aggregate remains unchanged at 99.3%.

Late Run: The Near Final spawning escapement estimate decreases by 76,140 spawners from the Preliminary estimate.  The difference is due to a decrease in the Harrrison River estimate following adjustments to address biases identified in the mark-recapture study.  Spawning success for the aggregate decreases slightly to 92.7%.

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