Transcript Possible Toxicity of Fire Ant Consumption to Yellowfin Shiners

Timing and distribution of naturally produced
coho salmon in the lower Columbia River
Presentation overview
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Background
Preliminary results
Management implications
Conclusions & recommendations
Background
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Declines in lower Columbia River coho salmon
Hatchery supplementation reestablished abundance
Reduced genetic diversity and hatchery effects on population
Federally listed in 2005 as “threatened”
Critical uncertainties research needed (avoidance vs mark selective)
Conceptual condition
Time
Metric
2011
2012
Date of 1st effort
8/28/2011
8/7/2012
Estuary
Receiver
Date of 1st capture
8/28/2011
8/7/2012
Date of last effort
10/31/2011 10/30/2012
Date of last capture Mainstem
10/19/2011
Gate 10/30/2012
Days fished
69
132
Total coho captured
460
971
Coho captured/day
7.4
Tributary Gate6.7
Total instrumented
129
303
Total August instrumented
2
48
Instrumented/day
1.87
2.30
LCR
Tributary
 129
coho
2011
instrumented
in 2011,2012
303
in 2012River
Elochoman
1
2
 In 2011
16 heard in tributaries
of1
Clatskanie
River
-15 over Bonneville
Mill interest,
Creek
-0
Cowlitz
River 39 heard in tributaries
7
 In 2012
of9
Lewis
River 44 detected over
1
5
interest,
Bonneville
Scappoose Creek
-0
 Excluding Willamette avg/trib ~ 2 fish
Clackamas River
0
1
 Only Washougal
didn’t--have coho0
Washougal
River
detected
Sandy
River at gates, but 1more had 2fish
only hit
at one or vacate
Willamette
River
2
19
Results
2011 Estuary Entrance
140
120
*
*
Catch (n)
100
80
Unmarked
60
Hatchery
40
*
20
0
33
34
35
36
37
38 39 40 41
Week Number
42
43
44
45
Results
2012 Estuary Entrance
140
120
*
Catch (n)
100
Unmarked
*
*
Hatchery
*
80
*
60
*
*
40
*
20
0
33
34
35
36
37
38
39
Week Number
40
41
42
43
44
45
Results
Year
Ultimate Fate
LCR Tributary Bonneville Dam
2011
9/10/2011
9/8/2011
2012
9/15/2012
8/26/2012
Results
40.0
35.0
rkm/day
30.0
25.0
20.0
15.0
10.0
5.0
0.0
0
50
100
150
200
Distance to Swim (km)
250
Conclusions
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Multi-modal run-timing is not
apparent in 2012 for CR coho
salmon
Upper river fish appear to enter
river earlier than lower river
counterparts
Distance and speed positively
correlated
Need to increase acoustic
presence in estuary tributaries to
greater account for fish
Need to increase transmitters out
to get better presence in nonWillamette lower river tributaries
Desired Status