Wednesday will be the last day to retain sturgeon in The Dalles Pool, of the mainstem Columbia River from The Dalles Dam upstream to John Day Dam and adjacent tributaries, and Sunday will be the last day to retain sturgeon in the John Day Pool from John Day Dam upstream to McNary Dam and adjacent tributaries.  Fishery managers from Washington and Oregon made the decision after determining that harvest guidelines will be reached soon due to higher-than-expected effort and catch rates.  Through Tuesday, the projected catch in The Dalles Pool is 184 fish, or 97 percent of the guideline, while in John Day Pool, the projected catch thru Sunday is 101 fish which is 96 percent of the guideline.  Fishery managers implemented staggered, three-day-per-week fishing seasons in Bonneville and The Dalles pools this year to try and lengthen the season.  A combination of higher effort and good catch rates had sturgeon harvest accruing more quickly than managers originally projected.  Catch-and-release sturgeon fishing remains open in the mainstem upstream of Bonneville Dam, except angling for sturgeon is prohibited May 1 to August 31 within sanctuary areas below each of the dam tailraces.