The overall number of white sturgeon that are of legal size
(38 inches to 54 inches long) in the lower Columbia River continues to grow.
After a low of 72,200 fish in 2012, the population grew to
143,900 fish in 2015 and is expected to grow to 147,100 legal-sized fish this
That’s the good news.
However, there are still low numbers of spawning adult fish,
annual natural production of up to one-year-old sturgeon continues to be poor and there are reduced numbers of juvenile fish smaller than legal size.
These signs point to “ongoing productivity issues,”
according to an update before the Oregon Fish and Wildlife Commission, February
9, by Tucker Jones, manager of the Oregon Department of Fish and Wildlife’s
Ocean Salmon and Columbia River Program.
With just an estimated 3,000 spawner-sized adult sturgeon,
and a three-year (2013 – 2015) average of 3,300, the adult population remains
below the conservation status of 3,900 fish specified in the Lower Columbia
River and Oregon Coast White Sturgeon Conservation Plan, according to updates
given before the Washington and Oregon fish and wildlife commissions at their
meetings in January and February.
According to the update, the plan sets long-term management
goals for white sturgeon, including abundance levels for adults and sub-adults
(which include legal-sized fish) that constitute a “healthy and harvestable
The plan capped long-term harvest at 16 percent, a level
that was adopted by both Washington and Oregon in 2012 (both states
cooperatively manage white sturgeon in the Columbia River).
However, the number of legal-sized white sturgeon continued
to decline, and in 2014 both states declared a moratorium on commercial and
recreational fishing for the sturgeon in the lower Columbia River (the river
downstream of Bonneville Dam and in the
Willamette River up to Willamette Falls), but the states continue to allow
Neither commission ruled that catch-and-release should stop,
but the Washington Commission directed its fish and wildlife staff to consult
with the ODFW staff about closing catch and release fishing for white sturgeon.
“I don’t think we need to do that,” Jones said. “While the
sturgeon population is not where we’d like to see it, this is not a population
that is in danger. We’ve already taken pretty serious actions in response to
some of the things that have been happening with sturgeon. We’re already erring
on the side of protecting these fish.”
Tucker said that the commission was comfortable with ODFW
staff’s recommendation not to change “the current structure of the lower
Columbia River white sturgeon fisheries.”
That recommendation, he said, was based on several factors,
including the large number of fish in the population that are over 21 inches in
length, the stable, although low, adult numbers over the past five years, the
action already taken to suspend the fisheries and having a conservation plan in
place that provides a management framework.
In addition, after the moratorium began and the fishery
changed to catch-and-release only, the number of angler trips declined by over
90 percent. In 2013, the last year that harvest was allowed, anglers made
33,094 trips to fish for white sturgeon. That dropped to 3,120 in 2014 and
3,004 in 2015.
Prior to the harvest moratorium in 2014, harvest guidelines
were relatively high. With an estimated legal-sized population of 101,200 fish
in 2008, a harvest of 40,000 fish was allowed, and in 2009 the population
dropped to 95,000 fish, but the harvest guideline remained the same.
In 2010, the method of estimating the number of fish
changed. So, the 2010 legal sized
population was estimated at 65,300 (historic method) and 100,200 (setline
method) and harvest was set at 24,000 fish; in 2011 with the number of fish
estimated to be 72,800 (80,500), allowed harvest was set at 17,000 fish; and in
2012, the number was 83,400 (72,700) and harvest was set at 10,400.
Using only the setline
method of estimation, the number was 114,200 fish in 2013, with an allowed
harvest of 10,105 fish. That was the last year harvest was allowed.
Once harvest of the fish ceased, the estimated population of
legal-sized fish began to grow to 130,990 in 2014 and 143,840 in 2015.
Predation by pinnipeds continues to be a problem, except at
Bonneville Dam where the number of white sturgeon taken by sea lions has
declined, even while the number of sea lions present at the dam has increased,
according to WDFW information.
“Steller sea lion predation of white sturgeon began around
the mid-2000’s in the gorge below Bonneville Dam. Numbers of Steller sea lions
present in the tailrace immediately below the dam peaked in 2010 and again in
2015,” according to the WDFW summary. “Observed consumption of white sturgeon
at Bonneville Dam during the past four years has decreased annually, to less
than 5% of the peak level reached in 2011, indicating few sturgeon remain in
the area when sea lions are present.”
The Washington Fish and Wildlife Commission met January 22
and 23. A summary of the WDFW presentation on January 23 is at
http://wdfw.wa.gov/commission/meetings/2016/01/jan2216_11_summary.pdf and the
power point presentation is at http://wdfw.wa.gov/commission/meetings/2016/01/jan2216_11_presentation.pdf
The Oregon Fish and Wildlife Commission met February 11 and
12. A summary of the presentation is at
and the power point presentation is at http://www.dfw.state.or.us/agency/commission/minutes/16/02_february/Exhibit%20E%20White%20Sturgeon%20Update%20PPT.pdf
-- CBB, October 16, 2015, “White Sturgeon Populations Hold
Steady In Columbia River Reservoirs, Spawner Abundance A Concern,” http://www.cbbulletin.com/435272.aspx
-- CBB, October 9, 2015, “Report: California Sea Lions This
Year Take Big Chunk Out Of Willamette River Spring Chinook Run,” http://www.cbbulletin.com/435197.aspx
-- CBB, August 28, 2015, “Research Details Columbia River
Sturgeon Health; Fish Commonly Found With Old Fishing Hooks, Tackle,” http://www.cbbulletin.com/434823.aspx
-- CBB, July 17, 2015, “Heat-Stressed Large Sturgeon Dying;
States Close Sturgeon Fishing From Bonneville Dam to Mid-Columbia,” http://www.cbbulletin.com/434540.aspx
-- CBB, May 29, 2015, “Latest Status Report Shows Sea Lion
Presence At Bonneville Dam This Year Smashing Single Day Records,” http://www.cbbulletin.com/434131.aspx
-- CBB, May 15, 2015, “Pinniped Monitoring At Bonneville Dam
This Year Showing Record Number Of Sea Lions, Salmon Predation,” http://www.cbbulletin.com/434021.aspx