Download or read book Comparison of Counting Tower Estimates and Digital Video Counts of Coho Salmon Escapement in the Ugashik Lakes written by Michael R. Edwards and published by . This book was released on 2005 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: A counting tower and a video camera next to it were stationed where Lower Ugashik Lake drains into the Ugashik River. The number of coho salmon passing into the lakes was determined by the observer in the tower and from the video footage. Daily escapement estimates from both methods were compared.

Download or read book Salmonid Field Protocols Handbook written by David H. Johnson and published by . This book was released on 2007 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first publication to collect, standardize, and recommend a scientifically rigorous set of field protocols for monitoring and assessing salmon and trout populations. Includes five additional techniques that can be used with any of the 13 principle methods to supplement information gathered.Over four dozen fisheries experts throughout the U.S. Pacific Northwest and beyond contributed their time to pick, write, and review the most reliable protocols for enumerating salmonids in the field. Presented in an easy to use format, each of the 18 peer-reviewed protocols covers objectives, sample design, data handling, personnel and operational requirements, and field and office techniques, including survey forms.Standardized monitoring protocols will improve data reliability, maximize opportunities for data sharing and data set comparability, and ultimately improve the ability to assess status and trends. The Handbook will also support consistency in data collection for salmonids at the international level.

Download or read book A Comparison of Escapement Estimate Methods Plus Escapement recruitment Relationships for Chinook Salmon and Coho Salmon in a Coastal Stream written by Stephen A. Gough and published by . This book was released on 2010 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Abundance and Run Timing of Adult Salmon in Tanada Creek in the Wrangell St Elias National Park and Preserve written by Molly B. McCormick and published by . This book was released on 2008 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Specific objectives of this study were: 1. To use a weir to monitor annual variations in the abundance of adult sockeye and Chinook salmon in Tanada Creek and document the timing of the passage of these fish past the weir site between early June and late September; 2. to measure the entry pattern of sockeye and Chinook salmon to Tanada Creek and compare the entry pattern to the historic entry pattern data set to test for changes in annual run timing; 3. to estimate the age, sex and length of the sockeye population by sampling 10 percent of the sockeye salmon proportionate to their abundance with a minimum of 100 fish per week and a maximum of 100 fish per night; 4. to compare video estimates with weir counts to determine the effectiveness of a video tower to estimate salmon escapement in Tanada Creek; 5. to test the feasibility of sampling water quality and zooplankton to determine if variations in water quality and zooplankton biomass correlate with variations in adult sockeye salmon escapement to Tanada Lake; 6. to provide an educational opportunity for local students and residents to learn about the Tanada Creek salmon runs and how the weir counts help to provide information needed to manage subsistence fisheries on the Copper River."--P. 1-2.

Download or read book Lower Cook Inlet Remote Video Salmon Escapement Monitoring Operational Plan 2023 written by Edward O. Otis and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall purpose of this project is to provide information on the run-timing and magnitude of sockeye salmon Oncorhynchus nerka escapements to Mikfik and Chenik lakes in the Kamishak District of the Lower Cook Inlet Management Area (LCIMA). Results will be used by Alaska Department of Fish and Game (ADF&G) fisheries managers to facilitate informed inseason management of commercial purse seine fisheries targeting these stocks to be consistent with sustained yield of wild stocks (AS 16.05.730), follow appropriate principles and criteria in the Policy for the Management of Sustainable Salmon Fisheries (5 AAC 39.222), and achieve spawning escapement goals (5 AAC 39.223). This plan documents procedures we developed for estimating sockeye salmon escapement using an unmanned, or autonomous video counting tower (AVCT) that employs above-stream remote video cameras and digital time-lapse recording equipment (Otis and Dickson 2002). Hard drives are retrieved regularly, and video reviewed immediately so managers can use these data to adjust fishery openings in season to attain established escapement goals (Hollowell et al. 2022). The annual escapement indices derived by remote video are also used to refine the sustainable escapement goals for these stocks, currently established by ADF&G at 3,400–11,000 for Mikfik Lake and 2,900–13,700 for Chenik Lake (Table 1; Otis et al. 2010, Otis et al. 2013, Otis et al. 2016).

Download or read book Red Lake Remote Video Salmon Escapement Monitoring Project 2022 written by Tim Blackmon and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: From June 8 through October 13, 2022, Alaska Department of Fish and Game staff operated an autonomous video counting tower (AVCT) immediately below the outlet of Red Lake within the Southern District of the Lower Cook Inlet Management Area (LCIMA). The AVCT was programmed to record high-resolution time-lapse video during daylight hours to provide information on the run-timing and magnitude of Pacific salmon (Oncorhynchus spp.) escapements into Red Lake. This project was a component of the Alaska Energy Authority’s preliminary assessment of fishery resources in the Martin River drainage, which is under consideration for future hydroelectric power development. Sockeye salmon (O. nerka), coho salmon (O. kisutch), pink salmon (O. gorbuscha), and Dolly Varden (Salvelinus malma) were captured on video migrating upstream to Red Lake in 2022. Additionally, juvenile coho salmon were collected from the lake shoreline during a spring sampling trip. The AVCT operated without interruption and documented 681 sockeye salmon with the peak daily count occurring on June 21. Peak run timing for coho salmon occurred on October 10 with a total observed escapement of 48. The AVCT documented 5 pink salmon and 53 Dolly Varden, as well as a variety of wildlife.

Download or read book A Simulation Study of Temporal Sampling Designs for Salmon Counting Towers written by Jeffrey F. Bromaghin and published by . This book was released on 1999 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study objective was to compare the performance of sampling designs used to estimate Pacific salmon escapement.

Download or read book Gulkana River Chinook Salmon Escapement Estimation 2022 2026 written by Tracy R. Hansen and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objectives of this study are to estimate the spawning escapement and run timing of Chinook salmon Oncorhynchus tshawytscha in an index area of the Gulkana River using counting tower methodology. In addition, sockeye salmon O. nerka escapement at the tower site will be estimated during the period of tower operation. The number of Chinook salmon and sockeye salmon passing the tower site will be estimated by visually counting fish as they pass 2 counting towers located approximately 2.5 km upstream of the confluence of the West Fork. Ten-minute visual counts will be conducted for each river channel every hour, 24 hours per day, 7 days per week. The abundance estimates will be stratified by day. Because counts are planned for all hours, daily estimates of abundance will be a single-stage direct expansion from the 10 min counting periods. The count schedule will start prior to the beginning of the Chinook salmon run, approximately 3 June, and continue until after 10 August when the run is complete. Tower operations may be extended to a later date to enumerate more of the sockeye salmon run if funding is provided by Prince William Sound Aquaculture Corporation.

Download or read book Red Lake Remote Video Salmon Escapement Monitoring Operational Plan 2022 written by Edward O. Otis and published by . This book was released on 2022 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall purpose of this project is to provide information on the run-timing and magnitude of Pacific salmon Oncorhynchus spp. escapements to Red Lake in the Southern District of the Lower Cook Inlet Management Area (LCIMA). Results will be used by Alaska Department of Fish and Game (ADF&G) and Alaska Energy Authority (AEA) staff to evaluate the extent to which salmon access and use Red Lake. This project is 1 component of the AEA’s preliminary assessment of fishery resources in the Martin River drainage, which is under consideration for future hydroelectric power development. This plan documents procedures developed for estimating salmon escapement using unmanned, or autonomous video counting towers (AVCT) that employ above-stream remote video cameras and digital time-lapse recording equipment (Otis and Dickson 2002, Otis 2020). Hard drives will be retrieved monthly, and video reviewed to enumerate daily escapement for all species identified passing the video site.

Download or read book Lower Cook Inlet Remote Video Salmon Escapement Monitoring Operational Plan 2020 2022 written by Edward O. Otis and published by . This book was released on 2020 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall purpose of this project is to provide information on the run-timing and magnitude of sockeye salmon Oncorhynchus nerka escapements to Mikfik and Chenik lakes in the Kamishak District of the Lower Cook Inlet Management Area (LCIMA). Results will be used by Alaska Department of Fish and Game (ADF&G) fisheries managers to facilitate informed inseason management of commercial purse seine fisheries targeting these stocks to be consistent with sustained yield of wild stocks, follow appropriate principles and criteria in the Policy for the Management of Sustainable Salmon Fisheries, and achieve spawning escapement goals. This plan documents procedures we developed for estimating sockeye salmon escapement using an unmanned, or autonomous video counting tower (AVCT) that employs above-stream remote video cameras and digital time-lapse recording equipment. Hard drives are retrieved regularly, and video reviewed immediately so managers can use these data to adjust fishery openings in season to attain established escapement goals. The annual escapement indices derived by remote video are also used to refine the sustainable escapement goals for these stocks, currently established by ADF&G at 3,400-11,000 for Mikfik Lake and 2,900-13,700 for Chenik Lake.

Download or read book A Comparative Evaluation of Fence Count Mark recapture and Bendix Sonar Estimates of Salmon Escapements in the Keogh River a Variable flow Coastal B C Stream written by Canada. Department of Fisheries and Oceans and published by . This book was released on 1985 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cost, reliability, accuracy, and precision of mark-recapture and Bendixside-scan sonar estimates of spawning escapements were compared againstfence counts between 26 July and 5 December 1985 for pink, coho, and chumsalmon in the Keoh River, a highly variable-flow B.C. coastal river. Allmark-recapture estimates of pink salmon escapements had good precision (CVabout 8%). Mark-recapture estimates for coho and chum salmon were lessaccurate and less precise because of the small numbers of tag recoveries. Tag recovery surveys could be made about 75 % of the time. Bendix side-scansonar estimates of total salmon escaptments greatly exceeded knownescapements.

Download or read book Estimation of Coho Salmon Escapement in the Ugashik Lakes Alaska Peninsula National Wildlife Refuge Alaska 2002 written by Michael R. Edwards and published by . This book was released on 2003 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chilkat Lake Sockeye Salmon Escapement Goal Review written by Sara E. Miller and published by . This book was released on 2018 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: We reviewed the escapement goal for the Chilkat Lake sockeye salmon (Oncorhynchus nerka) run, which is intensely harvested in the District 15 commercial drift gillnet fishery in Lynn Canal, Southeast Alaska. The current biological escapement goal of 70,000 to 150,000 sockeye salmon was established in 2009, based on a spawner-recruit analysis with weir counts converted to mark-recapture units. We fit age-structured state-space spawner-recruit models to updated 1976-2016 data on abundance, harvest, age composition, and coefficients of variation to examine the effect of autocorrelation and fry plants on recruits and to recommend a new biological escapement goal in Dual-frequency Identification Sonar (DIDSON) units. Historical mark-recapture and weir counts were considered indices of escapement, while the DIDSON counts (2008-2016) were considered 'true' counts of escapement. Fishery management reference points as well as optimal yield, optimal recruitment, and overfishing profiles were estimated from the final state-space Ricker model. Estimates derived from the state-space Ricker model suggest that the probability of achieving yields greater than 90% of maximum sustained yield from escapements at the current upper and lower bounds is 62% and 34%, respectively, and an average 65% over the entire escapement goal range. Therefore, we recommend maintaining the current biological escapement goal of 70,000 to 150,000 sockeye salmon counted at the Chilkat Lake weir site with the DIDSON sonar.

Download or read book Amendment Battle Creek Coho Salmon Escapement and Juvenile Assessment 2023 2024 written by Holly I. Dickson and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Battle Creek coho salmon escapement project will provide daily and season-cumulative video weir counts of adult coho salmon (Oncorhynchus kisutch), a weekly and annual index of coho salmon escapement, and a catch-per-unit-effort index of the abundance of juvenile coho salmon. These estimates will be used by the Alaska Energy Authority (AEA) to fulfill a Fish and Habitat Management Implementation Plan (FHMIP) ordered by the Federal Energy Regulatory Commission (FERC) to monitor the adult and juvenile coho salmon populations in Battle Creek before and after creek diversion to assess whether a population decline has occurred (FERC 2016). Additionally, the Alaska Department of Fish and Game (ADF&G) Division of Sport Fish (SF) will use these data to better understand the size of coho salmon runs on the south side of Kachemak Bay and how these populations may be able to support sport fishing opportunities.

Download or read book Operational Plan Kodiak Road System Coho Salmon Stock Assessment and Escapement Monitoring 2021 2024 written by Kelly M. Krueger and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A weir will be used on the Buskin River to count the inriver coho salmon run, with harvest estimated by the Alaska Department of Fish and Game statewide harvest survey, returned subsistence permits, and commercial fish tickets. Age and sex information will be collected from the Buskin River coho salmon run, and the composition of the run by age and sex will be estimated. In addition, coho salmon escapements to 9 other drainages on the Kodiak road system (KRS) will also be indexed. Sustainable escapement goals (SEGs) associated with the American, Olds, and Pasagshak Rivers will be monitored via postseason escapement foot surveys. A simultaneous postseason drone survey will also be conducted on the American and Olds Rivers to continue exploring establishment of drone-based SEGs. Multiple inseason surveys will be conducted by drone at each of the Olds, American, and Pasagshak river drainages to provide inseason run information to fishery managers; the inseason data will also be used to explore new ways of establishing SEGs for the Pasagshak River. Postseason escapement foot surveys will be conducted for the remaining 6 KRS rivers without SEGs (Monashka Creek, Pillar Creek, Sargent Creek, Russian Creek, Salonie Creek, and Roslyn River). The Pasagshak River coho salmon escapement will also be estimated with a temporally stratified mark–recapture study.

Download or read book Chinook Salmon Escapement in the Chena and Salcha Rivers and Coho Salmon Escapement in the Delta Clearwater River 2018 written by Allison N. Matter and published by . This book was released on 2020 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: During 2018, the Alaska Department of Fish and Game conducted salmon enumeration projects on the Chena, Salcha, and Delta Clearwater Rivers in the Tanana River drainage. Chinook salmon Oncorhynchus tshawytscha escapements for the Chena and Salcha Rivers were estimated using tower-counting techniques with the addition of sonar (DIDSON and ARIS) apportionment, interpolation, and a Bayesian hierarchical model as a means of enumeration when high-water events precluded visual counts. The Chena River counting tower and sonars operated from 27 June until 10 August, and the final escapement estimate was 5,947 (SE = 226) Chinook salmon. The adjusted sex composition was 0.63 (SE = 0.07) male and 0.37 (SE = 0.07) female (n = 348). The dominant age class was 1.3 for males (41% of total escapement) and 1.4 for females (28% of total escapement). The Salcha River counting tower and sonars operated from 27 June until 10 August and the final escapement estimate was 4,195 (SE = 205) Chinook salmon. The adjusted sex composition was 0.65 (SE = 0.07) male and 0.35 (SE = 0.07) female (n=504). Like the Chena River, the dominant age class was 1.3 for males (31% of total escapement) and 1.4 for females (35% of total escapement). Incomplete chum salmon Oncorhynchus keta escapements for the Chena and Salcha Rivers were estimated to be 13,084 (SE = 1705) and 39,996 (SE = 8,095), respectively. Coho salmon Oncorhynchus kisutch escapement in the Delta Clearwater River was estimated as 2,884 fish by a visual boat survey at peak escapement on 7 November.

Download or read book Escapement Goals for Coho Salmon Counted in Aggregate Surveys in the Ketchikan and Sitka Areas written by Leon D. Shaul and published by . This book was released on 2006 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses coho salmon escapement survey counts for groups of streams in the Ketchikan management area (14 streams) and the Sitka management area (5 streams).