2015 Lower Cowlitz River Rotary Screw Trap (CRST) 2016 Cowlitz River Fisheries and Aquatic Science Annual Conference
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1 2015 Lower Cowlitz River Rotary Screw Trap (CRST) 2016 Cowlitz River Fisheries and Aquatic Science Annual Conference Chris Wagemann - WDFW April 20, 2016
2 Presentation Overview Objectives Site Selection Trap Design, Installation & Permits Methods Preliminary Results Operation Fish capture numbers and biodata Trap efficiency Recommendations /Acknowledgements
3 Smolt Timing and Abundance Project Objectives Collect tissue samples from natural-origin (NOR) Chinook migrants proportional to their weekly outmigration to estimate adult Chinook abundance through genetic mark-recapture (GMR). Evaluate abundance of all NOR & HOR smolts but particularly focus on mark/recapture population abundance for Chinook as a key component to GMR.
4 Smolt Timing and Abundance Project Objectives Characterize juvenile migration timing and length distribution for HOR and NOR Chinook, coho, steelhead, cutthroat. Emphasis of 2015 trap operation will be to evaluate trap placement and position, release site locations that ensure adequate mixing of marked and unmarked fish, and appropriate mark types for each species.
5 Criteria CRST Site Selection Site selection was evaluated on river characteristics that would: Maximize trap proficiency Anchor/mooring potential at each site River accessibility (install, repair, access) Landowner agreements (ROE) Trap security
6 CRST Site Selection Potential Locations Five sites were identified approximately one mile apart 1) Olequa/Old Bridge Pier 2) Olequa Creek/Olequa 2 3) BNSF Train Trestle 4) Hog Island 5) Rock Creek
7 Potential Site Locations
8 CRST PERMITTING JARPA, 4(d), Access Agreements Joint Aquatic Resource Permit App (JARPA) Federal, State & County. Authorization & Permits for Protected Species 4d Rule Coverage Right of Entry (ROE) agreements w/ Ebersol & BNSF (moorage sites) and Hensley (trailer & CRST access ).
9 Lower Cowlitz River Map
10 CRST Site Map
11 CRST Installation Trap Design The structure is 16-feet wide atop 40 foot long steel pontoons. Its tallest component is a 12-foot tall manual hoisting mechanism that moves the cone in and out of the water.
12 CRST Installation Trap Design/Construction The CRST consists of an 8-foot cone that has interior baffles which are supported by a metal frame.
13 CRST Installation Trap Design/Construction
14 CRST Installation The cone reaches approximately 4- feet below the surface of the water when lowered into position for fish collection.
15 CRST Installation
16 Amber hazard blinking lights at all four corners. Caution signs placed 200 meters upstream/downstream. Tacoma Power Notice / CRST Q & A signs upstream and downstream at boat ramps providing public/boaters of the location and function of the trap.
17 CRST Installation Anchor configuration: lifting strap with shackle holding one of the bow lines.
18 CRST Installation Lifting strap with shackle & deflection point holding one of the bow lines.
19 CRST Installation Challenges Boat Guard Trash Drum & Live box Riser Support & Reinforcement
20 2015 CRST Goals Catch and enumerate a portion (1-4%) of all downstream migrant salmonids. Externally mark all, or a portion of, the healthy maiden captured HOR & NOR migrants Release marked fish above the trap, and subsequent recapture to estimate trapping efficiency and abundance.
21 2015 CRST Goals Evaluate the trap location though frequent independent targeted release groups from Cowlitz Falls Fish Facility, Mayfield Migrant Trap and Cowlitz Hatcheries. Collect genetic and biological data (length, weight, scales, tags and fin clips) from a portion of the salmonid migrants captured.
22 CRST Methods Proposed Operation Schedule The goal in 2015 was to work towards operating 24/7 -depending on CRST and/or river conditions and fish presence. To understand day and nighttime movements, catch sampled twice daily, just after sunrise, and just before dark.
23 CRST Methods Trap Efficiency mark-recapture A mark-recapture study design was refined throughout 2015 CRST operation. Targeted number of recaptures per interval was 10 fish. Sample sizes for efficiency trials required all available/healthy migrants to be marked and released above the CRST. A marking rotation was used per interval. All salmonids were examined for a mark.
24 CRST Methods Smolt Biodata Fish were enumerated by Species Life stage Origin (HOR/NOR) Mark\tag types (i.e. CWT, PIT & Visual Implant Elastomer (VIE)). Biological data (length, scales from steelhead and Chinook > 70 mm FL) from a random subsample of up to 20 fish per species per day.
25 CRST Methods DNA Sample Collection Chinook NOR genetic samples were collected from 50% the fry and every parr/smolt and adjusted accordingly throughout the year as needed to acquire a minimum of 3,000 tissue samples. Tissue samples need to be representative and proportionally to NOR Chinook migrants.
26 CRST Operation Schedule Trapping commenced May 27th Days in/ Days out Typically scheduled trap checks are the exception during seasonal changes and periods of inclement weather.
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28
29 Trap Outages Reasons for trap outage
30 Trap Outages
31 Trap Outages
32
33 CRST Results Days Fished/Schedule Daily collection Totals by species/life stage DNA Samples Collected Smolt Biodata/ Histograms Trap Efficiency Mark-Recapture
34 First Night s Catch n= 600
35 HOR & NOR Chinook Migrants
36 CRST Daily Salmonid Collection
37 2015 Total Capture by Species and Lifestage 2015 Chinook S/P/T Chinook Fry Coho S/P/T Steelhead S/P/T Cutthroat S/P/T Trout General Non Salmonids Total Fish Total Migrants Season HOR NOR NOR HOR NOR HOR NOR HOR NOR Fry/Parr/Adult Total 6,493 1, ,375 10,117 8,742 (S-Smolt, P-Parr, T-Transitional). The CRST DNA sample Count for 2015 = 1,100
38
39
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41 2015 CRST Trap Efficiency Mark-Recapture 2015 Mark Species Stage Released UCC or LCC Chinook and Coho S/P/T UCC or LCC Chinook Fry Bismarck Brown Chinook Fry Total Released Recapture UCC or LCC Chinook and Coho S/P/T UCC or LCC Chinook Fry Bismarck Brown Chinook Fry Total Recaptures Weeks Totals UCC/LCC- Upper Caudal Clip/Lower Caudal Clip, S-Smolt, P-Parr, T-Transitional
42 2016 CRST Totals Chinook Coho other Smolt Smolt salmonid Total 2016 Fry Parr Trans NOR HOR Fry/Parr Parr NOR HOR to date 13, ,966 The CRST DNA sample Count for 2016 = 4,134
43 2016 CRST Trap Efficiency Mark-Recapture Marked Recaptured Chinook Coho Other Chinook Coho Other Fry S0+/P/T Fry S0+/P/T Fry Fry S0+/P/T Fry S0+/P/T Fry Bismarck Brown 2, Caudal Clip Species Subtotal 2, Weekly Total 2, Percentage 0.720%
44 Recommendations CRST Cone Alarm Explore Alternative Monitoring Devices 24/7 operation or a statistically valid alternative
45 Acknowledgments Funding by Tacoma Power Tacoma Personnel Mark LaRiviere & Scott Gibson NAES Personnel Landowners Burlington Northern and Santa Fe railway (BNSF) Larry Hensley and Ethan Ebersol Technicians Mike Blankenship (lead), Caroline Watson, Tiffany Best, Jessie Jones, Michelle Hilton, Grant Brink WDFW Pete Topping, Matt Klungle, Mara Zimmerman
46 Questions?
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