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Archive | Date | Time | Type | From | To | By |
9/15/2011 | 9:52 AM | Status | Draft | <System> | ||
Download | 12/15/2011 | 9:28 PM | Status | Draft | ISRP - Pending First Review | <System> |
2/16/2012 | 3:27 PM | Status | ISRP - Pending First Review | ISRP - Pending Final Review | <System> | |
4/17/2012 | 2:56 PM | Status | ISRP - Pending Final Review | Pending Council Recommendation | <System> | |
2/12/2014 | 10:04 AM | Status | Pending Council Recommendation | Pending BPA Response | <System> | |
2/12/2014 | 12:20 PM | Status | Pending BPA Response | Proposal Vetted | <System> |
Proposal Number:
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RESCAT-2008-115-00 | |
Proposal Status:
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Proposal Vetted | |
Proposal Version:
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Proposal Version 1 | |
Review:
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Resident Fish, Regional Coordination, and Data Management Category Review | |
Portfolio:
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Resident Fish, Regional Coordination, and Data Management Categorical Review | |
Type:
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Existing Project: 2008-115-00 | |
Primary Contact:
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Jason McLellan | |
Created:
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9/15/2011 by (Not yet saved) | |
Proponent Organizations:
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Colville Confederated Tribes |
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Project Title:
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Lake Roosevelt Burbot Population Assessment | |
Proposal Short Description:
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Our long-term goal is a healthy and harvestable burbot population in Lake Roosevelt. Our project objective is to monitor the status and trend of the Lake Roosevelt burbot population to facilitate management to achieve our goal. Standardized stock assessment data is needed to facilitate management of the Lake Roosevelt burbot population. | |
Proposal Executive Summary:
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Our long-term goal is a healthy and harvestable burbot population in Lake Roosevelt. Our project objective is to monitor the status and trend of the Lake Roosevelt burbot population to facilitate management to achieve our goal. Standardized stock assessment data is needed to facilitate management of the Lake Roosevelt burbot population. Under this project, we are proposing to implement a burbot stock assessment program in Lake Roosevelt to monitor status and trends in abundance, survival, catch rates, proportion positive catch, size structure, growth, and condition. Initially, we will analyze the Fall Walleye Index Netting (FWIN; see Lake Roosevelt Data Collection Project, BPA Project No. 1994-043-00) burbot data for trends in mean catch rate, proportion positive catch, size structure, growth, and condition (relative weight), as well as investigate the power (1-ß) of all statistical tests (inferential). The second component will consist of a comparison of the aforementioned stock status metrics generated from catch in FWIN gill nets, cod traps, and trammel nets. The gear comparisons, along with the results of the initial analysis of the FWIN data, will allow us to evaluate whether or not FWIN alone is adequate for burbot stock assessment, as well as identify the most efficient non-lethal technique if the FWIN data are not adequate and for capture-recapture experiments to estimate abundance and survival. Cod traps were selected because they have equal or greater efficiency (catch-per-unit-effort) than hoop nets, are easier to transport, pull into the boat on retrieval, and remove the catch. Trammel nets were selected due to their high efficiency in previous investigations. Finally, we will implement a burbot stock assessment program based on the results of the first two components. |
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Purpose:
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Hydrosystem | |
Emphasis:
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RM and E | |
Species Benefit:
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Anadromous: 0.0% Resident: 100.0% Wildlife: 0.0% | |
Supports 2009 NPCC Program:
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No | |
Subbasin Plan:
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Fish Accords:
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Biological Opinions:
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None |
Background
Despite their wide distribution, burbot Lota lota have often been neglected by anglers and fish management agencies in North America (Quinn 2000). Only four of 20 states with burbot regulated their harvest as of 2000, yet growing angler interest in burbot in some regions, ecosystem-based management, and declines in some populations emphasize the need for greater focus on burbot by management entities.
Several North American burbot populations have declined and the declines were attributed to over harvest (Bonar et al. 2000a; Paragamian et al. 2000; Quinn 2000; Ward et al. 2000), negative species interactions (Carl 1992; Bonar et al. 2000a), and impacts from hydropower development (Paragamian et al. 2000), decreased productivity (Paragamian et al. 2000), and reservoir fluctuations (Krueger and Hubert 1997).
In Washington State, populations of burbot are known to occur in 11 lakes and reservoirs in the upper Columbia River drainage (Bonar et al. 1997; Bonar et al. 2000a; Wydoski and Whitney 2003). A review of burbot stock status in Washington categorized the status of each population as healthy, depressed, critical, or unknown based on existing abundance, size structure, growth, and condition data (Bonar et al. 1997; Bonar et al. 2000a). The Lake Roosevelt population was considered healthy due to its stable abundance based on electrofishing and gill net catch-per-unit-effort (C/f) data, although nothing was known about size structure, growth, or condition.
Subsequent to the status review, Polacek et al. (2006) analyzed data from burbot captured during electrofishing and gill net sampling conducted on Lake Roosevelt between 1988 and 2001. They indicated that abundance, based on C/f, had increased after 1994; though, all of the C/f values were relatively low and the trend analysis was qualitative. Growth and condition of Lake Roosevelt burbot were found to be low, which were attributed to poor rearing conditions in the reservoir (Polacek et al. 2006). They suggested that reservoir operations were unlikely to change, so if the Lake Roosevelt burbot population is a priority then it will likely have to be actively managed to achieve increases in abundance, survival, growth, and condition.
Standardized stock assessment data is needed to facilitate management of the Lake Roosevelt burbot population. Bonar et al. (1997; 2000a) pointed out the need for a standardized stock assessment program that monitors trends in abundance, growth, and condition of burbot in Washington State. Standardized fish sampling programs have been used to determine and monitor stock status of multiple fish populations (Ney 1993; Willis and Murphy 1996; Bonar et al. 2000b), including burbot (Bernard et al. 1993). Without a standardized stock assessment protocol, management biologists have no way of monitoring changes in burbot populations as a result of changes in management, exploitation, biological factors, or environmental factors.
The Fall Walleye Index Netting (FWIN) program implemented annually in Lake Roosevelt may provide the standardized stock assessment program needed for monitoring burbot population status and trends (see the proposal for the Lake Roosevelt Fisheries Evaluation Project, BPA Project No. 1994-043-00) for a complete description of FWIN). The FWIN program, established in 2002, is used to monitor Lake Roosevelt walleye population trends, but burbot are regularly captured as bycatch in FWIN gill nets. Managers recognized the potential of FWIN for monitoring burbot stock status, so catch and biological data were also collected on burbot. However, the FWIN data for burbot has never been analyzed. It is unknown if FWIN is adequate (α=0.05, β=0.20, effect=25%) for monitoring status and trends in stock assessment metrics (C/f, growth, condition). We are proposing to analyze the existing FWIN data to determine if it is adequate for monitoring burbot stock status.
Gill nets may not be the best gear for monitoring burbot stock status in Lake Roosevelt. Numerous studies have used gill nets to capture burbot (e.g. Dryer 1966; Stapanian et al 2006); however, the use of gill nets often result in high mortality, substantial bycatch, and size biased data (Hamley 1975). For these reasons, researchers have evaluated the use of other gears, such as hoop nets, trammel nets, modified cod traps, and slat traps. Hoop nets were used for burbot stock assessment in Alaska (Bernard et al. 1991; Bernard et al. 1993) and modified cod traps were used in British Columbia lakes after a comparison with hoop nets indicated higher catch rates in the cod traps (Spence 2000; Prince 2007). Cod traps were used to monitor burbot stock status in two eastern Washington lakes and they found that they had a negative behavioral response to capture in cod traps (McLellan and Hayes 2007, 2008; McLellan et al. 2009; McLellan and Hayes 2010, 2011). Horton and Strainer (2008) compared burbot catch statistics using hoop nets, cod traps, and slat traps and found no differences in catch rates, although the slat traps captured smaller burbot. Catch rates of burbot were >6 times higher in trammel nets than in hoop nets or cod traps (see Gardunio et al. 2011) and mortality of burbot captured in trammel nets was low (Abrahamse 2009), thus trammel nets have become the burbot stock assessment gear of choice in Wyoming. A pilot study comparing burbot catch rates using trammel nets, cod traps, and setlines was conducted in Palmer Lake, Washington in 2009 (WDFW, unpublished data). While the total catch of burbot was substantially higher in trammel nets, a high amount of bycatch resulted in reduced efficiency. There has been little comparison of size selectivity between the various gear types.
Under this project, we are proposing to implement a burbot stock assessment program in Lake Roosevelt to monitor status and trends in abundance, survival, catch rates, proportion positive catch, size structure, growth, and condition. Initially, we will analyze the FWIN burbot data for trends in mean C/f, proportion positive catch, size structure, growth, and condition (relative weight), as well as investigate the power (1-β) of all statistical tests (inferential). The second component will consist of a comparison of the aforementioned stock status metrics generated from catch in FWIN gill nets, cod traps, and trammel nets. The gear comparisons, along with the results of the initial analysis of the FWIN data, will allow us to evaluate whether or not FWIN alone is adequate for burbot stock assessment, as well as identify the most efficient non-lethal technique if the FWIN data are not adequate and for capture-recapture experiments to estimate abundance and survival. Cod traps were selected because they have equal or greater efficiency (C/f) than hoop nets, are easier to transport, pull into the boat on retrieval, and remove the catch (Spence 2000). Trammel nets were selected due to their high efficiency in previous investigations (see Gardunio et al. 2011). Finally, we will implement a burbot stock assessment program based on the results of the first two components.
The Lake Roosevelt Co-Managers have particular concern for the Lake Roosevelt burbot population because it is a native species, provides harvest opportunity, and reservoir operations likely limit population productivity.
Management Questions
Goal and Objective
Our long-term goal is a healthy and harvestable burbot population in Lake Roosevelt. Our project objective is to monitor the status and trend of the Lake Roosevelt burbot population to facilitate management to achieve our goal.
Key Project Personnel
The project manager/principal investigator, Jason McLellan, has more than 13 years in the Inland Northwest, with more than 12 of those years as the project manager/principal investigator on one or more fish research or monitoring projects. He recently accepted a Resident Fish Biologist position with the CCT, where he is responsible for managing Bonneville Power Administration (BPA) resident fish research, monitoring, and evaluation projects related to redband trout, white sturgeon, and burbot. Mr. McLellan is the CCT’s technical lead for white sturgeon projects, such as the Mid-Columbia River Sturgeon Technical Group, and is the Tribes representative on the UCWSRI Technical Working Group. Prior to his employment with the CCT, Mr. McLellan was employed by the Washington Department of Fish and Wildlife (WDFW). He was the WDFW representative on the UCWSRI TWG from 2003 until his move to the CCT in June 2011. While at WDFW, Mr. McLellan was responsible for managing and conducting research and monitoring projects focused on resident fish conservation and management in the upper Columbia River basin. Projects included the Resident Fish Stock Status Above Chief Joseph and Grand Coulee Dams (BPA Project No. 1997-004-00), Lake Roosevelt White Sturgeon Recovery (BPA Project No. 1995-027-00), Redband Trout Spawning and Fry Emergence Study: Abundance and Year-Class Strength (Avista Corp.), Middle Spokane River Baseline Fish Population Assessment (Avista Corp.), and the Upper Columbia River White Sturgeon Fine-Scale Movement and Habitat Study (Washington Department of Ecology).
As project manager/principal investigator for the WDFW portion of the Resident Fish Stock Status Above Chief Joseph and Grand Coulee Dams (BPA Project No. 1997-004-00), Mr. McLellan had a primary role in the development, design, and implementation of all aspects of the project between 1999 and 2011, including burbot stock assessment studies on Bead and Sullivan lake in northeast Washington from 2006 through 2011 (McLellan and Hayes 2007, 2008; McLellan et al. 2009; McLellan and Hayes 2010, 2011). Mr. McLellan is also very familiar with the Lake Roosevelt Fall Walleye Index Netting program and has extensive experience analyzing capture-recapture data (Howell and McLellan 2007b; Baldwin et al. 2003; McLellan and King 2011). Mr. McLellan has successfully collaborated with a diverse range of professionals with expertise in limnology, toxicology, hydrogeology, hydrography, genetics, biostatistics, hydropower, contracting, and administration to meet the requirements of each of the projects he has managed.
The Lake Roosevelt Burbot Population Assessment is a new project, thus there are no other staff associated with this project. Our intent is to hire staff with training and experience necessary to complete the tasks identified in this proposal. In addition we will consult with an appropriately credentialed statistician for assistance with study design and data analysis.
Monitor status and trend of the Lake Roosevelt burbot population (OBJ-1)
Our long-term goal is a healthy and harvestable burbot population in Lake Roosevelt. Our project objective is to monitor the status and trend of the Lake Roosevelt burbot population to facilitate management to achieve our goal.
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To view all expenditures for all fiscal years, click "Project Exp. by FY"
To see more detailed project budget information, please visit the "Project Budget" page
Expense | SOY Budget | Working Budget | Expenditures * |
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FY2019 | $306,129 | $376,801 | |
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Fish Accord - Colville | $306,129 | $376,801 | |
FY2020 | $411,520 | $255,281 | $347,886 |
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Fish Accord - Colville | $255,281 | $347,886 | |
FY2021 | $427,034 | $357,904 | $265,366 |
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Fish Accord - Colville | $357,904 | $265,366 | |
FY2022 | $424,287 | $398,273 | $319,775 |
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Fish Accord - Colville | $398,273 | $319,775 | |
FY2023 | $400,577 | $460,146 | $443,917 |
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Fish Accord - Colville | $460,146 | $443,917 | |
FY2024 | $512,209 | $649,280 | $592,753 |
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Fish Accord - Colville | $649,280 | $592,753 | |
FY2025 | $420,856 | $569,586 | $209,595 |
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Fish Accord - Colville | $569,586 | $209,595 | |
* Expenditures data includes accruals and are based on data through 31-Mar-2025 |
Cost Share Partner | Total Proposed Contribution | Total Confirmed Contribution |
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Spokane Tribe | $15,000 | |
Washington Department of Fish and Wildlife (WDFW) | $15,000 | |
Colville Confederated Tribes | $2,230 | |
Colville Confederated Tribes | $100,415 | |
US Bureau of Reclamation (BOR) | $75,000 | |
US Environmental Protection Agency (EPA) | $200,000 | |
Total | $0 | $407,645 |
Annual Progress Reports | |
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Expected (since FY2004): | 24 |
Completed: | 14 |
On time: | 12 |
Status Reports | |
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Completed: | 48 |
On time: | 33 |
Avg Days Early: | 3 |
Count of Contract Deliverables | ||||||||||||||
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Earliest Contract | Subsequent Contracts | Title | Contractor | Earliest Start | Latest End | Latest Status | Accepted Reports | Complete | Green | Yellow | Red | Total | % Green and Complete | Canceled |
60316 | 64303, 67819, 71605, 73548 REL 3, 73548 REL 22, 73548 REL 52, 73548 REL 80, 73548 REL 106, 73548 REL 137, 91887, 84051 REL 11, 84051 REL 32 | 2008-115-00 EXP LAKE ROOSEVELT BURBOT POPULATION ASSESSMENT | Colville Confederated Tribes | 03/01/2013 | 02/28/2026 | Issued | 48 | 108 | 0 | 0 | 12 | 120 | 90.00% | 0 |
Project Totals | 48 | 108 | 0 | 0 | 12 | 120 | 90.00% | 0 |
View full Project Summary report (lists all Contracted Deliverables and Quantitative Metrics)
Explanation of Performance:Assessment Number: | 2008-115-00-NPCC-20210317 |
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Project: | 2008-115-00 - Lake Roosevelt Burbot Population Assessment |
Review: | 2020 Resident Fish and Sturgeon Project Review |
Approved Date: | 10/27/2020 |
Recommendation: | Implement |
Comments: |
Supported as reviewed. Bonneville and Manager review ISRP comments and implement to the extent possible. [Background: See https:/www.nwcouncil.org/fw/reviews/2019RFS] |
Assessment Number: | 2008-115-00-ISRP-20210319 |
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Project: | 2008-115-00 - Lake Roosevelt Burbot Population Assessment |
Review: | 2020 Resident Fish and Sturgeon Project Review |
Completed Date: | None |
Documentation Links: |
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Assessment Number: | 2008-115-00-NPCC-20120313 |
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Project: | 2008-115-00 - Lake Roosevelt Burbot Population Assessment |
Review: | Resident Fish, Regional Coordination, and Data Management Category Review |
Proposal: | RESCAT-2008-115-00 |
Proposal State: | Proposal Vetted |
Approved Date: | 12/31/2011 |
Recommendation: | Under Review |
Comments: | Implement Objective 1, deliverable 1 only through completion and not beyond FY2017 (Analysis of Fall Walleye Index Netting Bycatch Data). Sponsor to submit revised proposal based on this analysis for ISRP/Council for review and recommendation prior to additional assessment efforts in Lake Roosevelt. |
Publish Date: 02/12/2014
BPA Response: Agree
Project should be contracted to implement Objective 1, Deliverable 1, and then submit a new/revised proposal for the additional Deliverables. This will give ISRP, Council, and BPA a chance to review the additional proposed work before commencing it." |
Assessment Number: | 2008-115-00-ISRP-20120215 |
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Project: | 2008-115-00 - Lake Roosevelt Burbot Population Assessment |
Review: | Resident Fish, Regional Coordination, and Data Management Category Review |
Proposal Number: | RESCAT-2008-115-00 |
Completed Date: | 4/17/2012 |
Final Round ISRP Date: | 4/3/2012 |
Final Round ISRP Rating: | Meets Scientific Review Criteria - In Part |
Final Round ISRP Comment: | |
Qualification #1 - Qualification #1
In Part - The full proposal is not yet justified. Deliverable 1 should proceed. Previous and ongoing burbot data collection in Lake Roosevelt from WDFW Fall Walleye Index Netting (FWIN) should be fully examined and analyzed to determine if it is adequate for evaluating the status of burbot before exerting significant additional sampling effort in the lake. Evaluation based on Deliverable 1 should be used to design field sampling efforts, if needed, beyond existing efforts as a means to meet project goals. The ISRP should review a subsequent revised proposal that builds on results from Deliverable 1. The design should consider other ISRP comments noted below.
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First Round ISRP Date: | 2/8/2012 |
First Round ISRP Rating: | Meets Scientific Review Criteria - In Part |
First Round ISRP Comment: | |
1. Purpose: Significance to Regional Programs, Technical Background, and Objectives Significance to Regional Programs: The sponsor refers to several regional programs, including the Spokane Subbasin plan, the Columbia River Basin Research Plan, the Lake Roosevelt Guiding Document, MERR, and the NPPC Fish and Wildlife Program 2009. The declining status of burbot in many southerly portions of their range is a valid concern to resident fish managers. Technical Background: The proposal provides decent technical background information on sampling and status of burbot, although additional gray literature might be available on burbot sampling. Key information involving the ultimate goal of the proposal was missing until the presentation by the sponsor. During the presentation, the sponsor noted that current harvest levels of burbot are low because fishing gear is now limited to hook and line since set lines were banned in 2006. No sport or subsistence catch data was provided. According to WDFW regulations, the daily bag limit for burbot is currently five fish, but the state also recommends that women of child bearing years and children not consume more than one meal of burbot per week because the fish are contaminated. The sponsor cited a 10-year old WDFW report suggesting the Lake Roosevelt burbot population was “healthy” based on stable electrofishing and catch per effort sampling. Given the reportedly low catch rates of burbot by fishermen and the apparent healthy status of the population, the ultimate goal of this project seems to be whether the population of burbot could withstand a higher harvest rate, possibly through changes in gear regulation. If so, this would be a potential benefit to subsistence and recreational anglers. If changing harvest and gear regulations is an ultimate goal of this effort, then metrics and benchmarks for making this decision should be developed. Objectives: The goal is reasonable: a healthy and harvestable burbot population. The objective is reasonable: to monitor and facilitate management to achieve the goal. Specific target levels to define “healthy population” and harvest levels are needed. 2. History: Accomplishments, Results, and Adaptive Management (ISRP Review of Results) This is a new project so no accomplishments, adaptive management, or results. However, the ISRP thought the sponsor should have analyzed the existing Fall Walleye Index Netting data (FWIN) prior to developing this proposal to conduct extensive field effort. Analysis of the existing FWIN data may be sufficient to evaluate status of burbot relative to previous sampling efforts (e.g., Bonar study), and this analysis could be used to inform the sampling design if it was determined that an extensive field effort was needed in addition to ongoing FWIN sampling and creel survey efforts. 3. Project Relationships, Emerging Limiting Factors, and Tailored Questions for Type of Work (hatchery, RME, tagging) Project Relationships: The proposal described how this project was related to four other projects: Lake Roosevelt Data Collection Project, Kootenai River Resident Fish Mitigation, CCT Chief Joseph Kokanee, and CCT White Sturgeon Enhancement Project. Four BPA projects are listed that this project will coordinate with and share data. Emerging limiting factors: Climate change, chemical contamination, and potential impacts by non-native predators are discussed. Tailored questions: The sponsor addressed the PIT tag study to develop population estimates. They plan to tag and release all viable burbot, approximately 2200 fish per year based on assumptions. The sponsor notes that they do not know if the proposed sample size is adequate for estimating burbot population size, but they suggest this is not needed since the project is a pilot study. The ISRP notes that prior to the proposed field effort, the sponsor should examine “what if” scenarios to determine whether tagging of 1100 fish twice per year might be sufficient to detect population trends over time in this very large reservoir. Also, the sponsor should develop criteria for determining whether captured burbot are suitable for tag and release even though previous studies suggested mortality in trammel nets was low. Tagging of burbot that die from capture and tagging operations would significantly bias population estimates if not properly accounted for. The sponsor did describe how they would classify the health of burbot captured in traps. The sponsor notes that a biometrician would be consulted. 4. Deliverables, Work Elements, Metrics, and Methods Deliverables are adequate. The sponsor did a good job describing methods in MonitoringMethods.org. However, presenting methods on separate web pages makes it difficult to evaluate how the overall sampling program fits together. Additional information on metrics should have been provided. Age and year class strength are key metrics when assessing population status of fishes, yet it was not clear how age of burbot captured in traps, trammel nets, or gillnets (FWIN) will be assessed and incorporated into the analysis. Burbot are relatively long-lived (up to ~15 years) and could be susceptible to high harvest rates. Each gear type will have its own selectivity for size and age of burbot; how will selectivity be evaluated? 4a. Specific comments on protocols and methods described in MonitoringMethods.org The sponsor did a good job describing methods in MonitoringMethods.org. Estimates of growth will be based on recaptured burbot, but growth estimates may be few. Were other approaches considered and excluded for estimating growth? Modified by Dal Marsters on 4/17/2012 2:56:41 PM. |
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Documentation Links: |
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Project Relationships: | None |
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Additional Relationships Explanation:
The Lake Roosevelt Data Collection Project (BPA Project No. 1994-043-00) monitors fish populations, productivity, and water quality in Lake Roosevelt. As part of the fish population monitoring, the project leads the Fall Walleye Index Netting (FWIN). Data from burbot captured as bycatch during FWIN will be provided to the CCT Lake Roosevelt Burbot Population Assessment Project personnel for analysis. Increased understanding of the burbot population will help the Lake Rrosevelt Data Collection Project with its assessment of overall reservoir health.
The Kootenai River Resident Fish Mitigation (BPA Project No. 1988-065-00) has the objective of restoring recruitment of burbot in the Kootenai River. The project includes adult and juvenile stock assessment for status and trend monitoring. Information from the Kootenai River Resident Fish Mitigation Project will inform efforts to monitor the Lake Roosevelt population. Likewise, the effort of the Lake Roosevelt population assessments may provide the Kootenai project with valuable comparitative information.
The CCT burbot project will coordinate with the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA), or Superfund, remedial investigation/feasibility study (RI/FS) activities conducted on the upper Columbia River in Washington in relation to industrial contaminants from the smelter in Trail, BC. As part of the RI/FS, researchers are examining contaminant bioaccumulation in upper Columbia River burbot.
The CCT Chief Joseph Kokanee Project (BPA Project No. 1995-011-00) is leading the development of the CCT Resident Fish and Wildlife database. Data collected by the Lake Roosevelt Burbot Population Assessment will be included in the CCT Resident Fish and Wildlife database.
The CCT White Sturgeon Enhancement Project (BPA Project No. 2008-116-00) will share staff and equipment with the WSEP when feasible to ensure the projects are cost-effective and efficient.
Work Classes
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Work Elements
RM & E and Data Management:
156. Develop RM&E Methods and Designs157. Collect/Generate/Validate Field and Lab Data 158. Mark/Tag Animals 159. Transfer/Consolidate Regionally Standardized Data 160. Create/Manage/Maintain Database 161. Disseminate Raw/Summary Data and Results 162. Analyze/Interpret Data 183. Produce Journal Article Planning and Coordination:
191. Watershed Coordination |
Populations | Origin | # of PIT Tags per year | Type of PIT Tag | Years to be tagged | Comments |
Burbot (Lota lota) | Wild | 4000 | FDX - Full Duplex | 2013 - 2017 | No other marks or tags. |
Two components of the proposed stock assessment monitoring are estimation of abundance and survival of burbot in Lake Roosevelt. Currently we anticipate using the (closed) robust capture-recapture design to estimate abundance and survival (Kendall et al. 1997, 1995; Kendall and Nichols 1995; Kendall and Bjorkland 2001; Pollock 1982; Pollock et al. 1990). Generally, the robust design incorporates two methods of parameter estimation: an open method (Jolly-Seber models) that estimates survival between primary sample periods; and a closed method (Lincoln-Petersen, Schnabel) that estimates abundance from secondary sample periods that occur within each primary period. The strength of the Robust Design is that open model survival rate estimation is insensitive to variability in catchability and closed models can take unequal catchability into account.
The degree of sampling intensity during a mark-recapture effort is dictated by the desired level of accuracy and precision in the estimates balanced against logistical constraints. The burbot population assessment project has two boats available for stock assessment work. Each research boat can deploy approximately 10 trammel net sets per day (1 night soaks; 40 sets per week) or 30 cod traps per day (2 night soaks; 60 sets per week).
In the 2005, WDFW conducted a pilot cod trapping survey in Lake Roosevelt and catch averaged 0.7 fish per overnight set. Since cod traps have significantly higher catch rates in sets 2 nights or longer, we could reasonably expect catch rates to be greater. We will assume 0.85. Trammel nets are reported to have catch rates >6 times those of cod traps, so let's assume 5.0 per overnight set. Assuming then an average catch rate of 0.85 for cod traps and 5.00 for trammel nets, we could expect to capture about 1,100 burbot in four weeks of sampling. We would complete this sampling effort twice, once in the late fall and once in the early spring.
A general estimate of abundance and survival are required to calculate sample sizes for capture-recapture studies (Robson and Reiger 1964; Pollock et al. 1990). However, we have no idea about what the abundance and survival rates rate of burbot are in Lake Roosevelt. Thus, we consider the initial two years of the study a pilot, after which sample sizes can be adjusted.
Study plans will require further development in consultation with appropriately credentialed professional biometrician.
Name (Identifier) | Area Type | Source for Limiting Factor Information | |
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Type of Location | Count | ||
Grand Coulee Dam to Keenleyside Dam | Mainstem | None |
Work Class | Work Elements | ||||
Research, Monitoring, and Evaluation + Data Management |
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Planning and Coordination |
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Work Class | Work Elements | ||||
Research, Monitoring, and Evaluation + Data Management | |||||
Planning and Coordination |
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Work Class | Work Elements | ||||
Research, Monitoring, and Evaluation + Data Management | |||||
Planning and Coordination |
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Project Deliverables | How the project deliverables help meet this objective* |
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Analysis of Fall Walleye Index Netting burbot bycatch data (DELV-1) | We will analyze existing Fall Walleye Index Netting burbot bycatch data to determine if it is adequate for monitoring status and trends of the Lake Roosevelt burbot population. |
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Comparison of gears for burbot stock assessment (DELV-2) | Gear comparison is needed to insure the most efficient implementation of burbot stock assessment. Gill nets, as used in FWIN, may not be the best gear for monitoring burbot stock status in Lake Roosevelt. Numerous studies have used gill nets to capture burbot (e.g. Dryer 1966; Stapanian et al 2006); however, the use of gill nets often result in high mortality, substantial bycatch, and size biased data (Hamley 1975). For these reasons, researchers have evaluated the use of other gears, such as hoop nets, trammel nets, modified cod traps, and slat traps. Hoop nets were used for burbot stock assessment in Alaska (Bernard et al. 1991; Bernard et al. 1993) and modified cod traps were used in British Columbia lakes after a comparison with hoop nets indicated higher catch rates in the cod traps (Spence 2000; Prince 2007). Cod traps were used to monitor burbot stock status in two eastern Washington lakes and they found that there were negative behavioral responces to capture in cod traps (McLellan and Hayes 2007, 2008; McLellan et al. 2009; McLellan and Hayes 2010, 2011). Horton and Strainer (2008) compared burbot catch statistics using hoop nets, cod traps, and slat traps and found no differences in catch rates, although the slat traps captured smaller burbot. Catch rates of burbot were >6 times higher in trammel nets than in hoop nets or cod traps (see Gardunio et al. 2011) and mortality of burbot captured in trammel nets was low (Abrahamse 2009), thus trammel nets have become the burbot stock assessment gear of choice in Wyoming. A pilot study comparing burbot catch rates using trammel nets, cod traps, and setlines was conducted in Palmer Lake, Washington in 2009 (WDFW, unpublished data). While the total catch of burbot was substantially higher in trammel nets, a high amount of bycatch resulted in reduced efficiency. There has been little comparison of size selectivity between the various gear types. |
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Implement burbot stock assessment program (DELV-3) | We will implement the burbot stock assessment program to monitor status and trend of the Lake Roosevelt burbot population. |
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RM&E Protocol | Deliverable | Method Name and Citation |
Supplemental Burbot Sampling to Evaluate Lake Roosevelt FWIN Gill Net Length/Age Bias v1.0 |
Project Deliverable | Start | End | Budget |
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Analysis of Fall Walleye Index Netting burbot bycatch data (DELV-1) | 2013 | 2017 | $216,216 |
Comparison of gears for burbot stock assessment (DELV-2) | 2013 | 2015 | $635,767 |
Implement burbot stock assessment program (DELV-3) | 2013 | 2017 | $1,310,174 |
Total | $2,162,157 |
Fiscal Year | Proposal Budget Limit | Actual Request | Explanation of amount above FY2012 |
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2013 | $435,140 | ||
2014 | $407,307 | ||
2015 | $429,087 | ||
2016 | $439,814 | ||
2017 | $450,809 | ||
Total | $0 | $2,162,157 |
Item | Notes | FY 2013 | FY 2014 | FY 2015 | FY 2016 | FY 2017 |
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Personnel | $205,757 | $210,655 | $215,554 | $225,352 | $226,198 | |
Travel | $5,819 | $5,964 | $6,110 | $6,255 | $6,401 | |
Prof. Meetings & Training | $4,600 | $4,715 | $4,830 | $4,945 | $5,060 | |
Vehicles | $17,044 | $17,470 | $17,896 | $18,322 | $18,748 | |
Facilities/Equipment | (See explanation below) | $72,001 | $40,882 | $41,879 | $42,876 | $43,873 |
Rent/Utilities | $12,680 | $14,104 | $14,448 | $14,792 | $15,136 | |
Capital Equipment | $0 | $0 | $0 | $0 | $0 | |
Overhead/Indirect | $43,896 | $44,942 | $45,987 | $48,077 | $50,167 | |
Other | statistician subcontract and admin (13% of total) | $65,223 | $60,455 | $74,263 | $71,075 | $77,106 |
PIT Tags | $8,120 | $8,120 | $8,120 | $8,120 | $8,120 | |
Total | $435,140 | $407,307 | $429,087 | $439,814 | $450,809 |
Assessment Number: | 2008-115-00-ISRP-20120215 |
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Project: | 2008-115-00 - Lake Roosevelt Burbot Population Assessment |
Review: | Resident Fish, Regional Coordination, and Data Management Category Review |
Proposal Number: | RESCAT-2008-115-00 |
Completed Date: | 4/17/2012 |
Final Round ISRP Date: | 4/3/2012 |
Final Round ISRP Rating: | Meets Scientific Review Criteria - In Part |
Final Round ISRP Comment: | |
Qualification #1 - Qualification #1
In Part - The full proposal is not yet justified. Deliverable 1 should proceed. Previous and ongoing burbot data collection in Lake Roosevelt from WDFW Fall Walleye Index Netting (FWIN) should be fully examined and analyzed to determine if it is adequate for evaluating the status of burbot before exerting significant additional sampling effort in the lake. Evaluation based on Deliverable 1 should be used to design field sampling efforts, if needed, beyond existing efforts as a means to meet project goals. The ISRP should review a subsequent revised proposal that builds on results from Deliverable 1. The design should consider other ISRP comments noted below.
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First Round ISRP Date: | 2/8/2012 |
First Round ISRP Rating: | Meets Scientific Review Criteria - In Part |
First Round ISRP Comment: | |
1. Purpose: Significance to Regional Programs, Technical Background, and Objectives Significance to Regional Programs: The sponsor refers to several regional programs, including the Spokane Subbasin plan, the Columbia River Basin Research Plan, the Lake Roosevelt Guiding Document, MERR, and the NPPC Fish and Wildlife Program 2009. The declining status of burbot in many southerly portions of their range is a valid concern to resident fish managers. Technical Background: The proposal provides decent technical background information on sampling and status of burbot, although additional gray literature might be available on burbot sampling. Key information involving the ultimate goal of the proposal was missing until the presentation by the sponsor. During the presentation, the sponsor noted that current harvest levels of burbot are low because fishing gear is now limited to hook and line since set lines were banned in 2006. No sport or subsistence catch data was provided. According to WDFW regulations, the daily bag limit for burbot is currently five fish, but the state also recommends that women of child bearing years and children not consume more than one meal of burbot per week because the fish are contaminated. The sponsor cited a 10-year old WDFW report suggesting the Lake Roosevelt burbot population was “healthy” based on stable electrofishing and catch per effort sampling. Given the reportedly low catch rates of burbot by fishermen and the apparent healthy status of the population, the ultimate goal of this project seems to be whether the population of burbot could withstand a higher harvest rate, possibly through changes in gear regulation. If so, this would be a potential benefit to subsistence and recreational anglers. If changing harvest and gear regulations is an ultimate goal of this effort, then metrics and benchmarks for making this decision should be developed. Objectives: The goal is reasonable: a healthy and harvestable burbot population. The objective is reasonable: to monitor and facilitate management to achieve the goal. Specific target levels to define “healthy population” and harvest levels are needed. 2. History: Accomplishments, Results, and Adaptive Management (ISRP Review of Results) This is a new project so no accomplishments, adaptive management, or results. However, the ISRP thought the sponsor should have analyzed the existing Fall Walleye Index Netting data (FWIN) prior to developing this proposal to conduct extensive field effort. Analysis of the existing FWIN data may be sufficient to evaluate status of burbot relative to previous sampling efforts (e.g., Bonar study), and this analysis could be used to inform the sampling design if it was determined that an extensive field effort was needed in addition to ongoing FWIN sampling and creel survey efforts. 3. Project Relationships, Emerging Limiting Factors, and Tailored Questions for Type of Work (hatchery, RME, tagging) Project Relationships: The proposal described how this project was related to four other projects: Lake Roosevelt Data Collection Project, Kootenai River Resident Fish Mitigation, CCT Chief Joseph Kokanee, and CCT White Sturgeon Enhancement Project. Four BPA projects are listed that this project will coordinate with and share data. Emerging limiting factors: Climate change, chemical contamination, and potential impacts by non-native predators are discussed. Tailored questions: The sponsor addressed the PIT tag study to develop population estimates. They plan to tag and release all viable burbot, approximately 2200 fish per year based on assumptions. The sponsor notes that they do not know if the proposed sample size is adequate for estimating burbot population size, but they suggest this is not needed since the project is a pilot study. The ISRP notes that prior to the proposed field effort, the sponsor should examine “what if” scenarios to determine whether tagging of 1100 fish twice per year might be sufficient to detect population trends over time in this very large reservoir. Also, the sponsor should develop criteria for determining whether captured burbot are suitable for tag and release even though previous studies suggested mortality in trammel nets was low. Tagging of burbot that die from capture and tagging operations would significantly bias population estimates if not properly accounted for. The sponsor did describe how they would classify the health of burbot captured in traps. The sponsor notes that a biometrician would be consulted. 4. Deliverables, Work Elements, Metrics, and Methods Deliverables are adequate. The sponsor did a good job describing methods in MonitoringMethods.org. However, presenting methods on separate web pages makes it difficult to evaluate how the overall sampling program fits together. Additional information on metrics should have been provided. Age and year class strength are key metrics when assessing population status of fishes, yet it was not clear how age of burbot captured in traps, trammel nets, or gillnets (FWIN) will be assessed and incorporated into the analysis. Burbot are relatively long-lived (up to ~15 years) and could be susceptible to high harvest rates. Each gear type will have its own selectivity for size and age of burbot; how will selectivity be evaluated? 4a. Specific comments on protocols and methods described in MonitoringMethods.org The sponsor did a good job describing methods in MonitoringMethods.org. Estimates of growth will be based on recaptured burbot, but growth estimates may be few. Were other approaches considered and excluded for estimating growth? Modified by Dal Marsters on 4/17/2012 2:56:41 PM. |
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Documentation Links: |
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Proponent Response: | |
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