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Stock Assessment And Restoration Of The Afognak Lake Sockeye Salmon Run
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Book Synopsis Stock Assessment and Restoration of the Afognak Lake Sockeye Salmon Run by : Robert T. Baer
Download or read book Stock Assessment and Restoration of the Afognak Lake Sockeye Salmon Run written by Robert T. Baer and published by . This book was released on 2007 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the fishery and limnological results from the 2004 to 2006 season and compiles all of the available historical data associated with the Afognak Lake system.
Book Synopsis Stock Assessment and Restoration of the Afognak Lake Sockeye Salmon Run by : Steven G. Honnold
Download or read book Stock Assessment and Restoration of the Afognak Lake Sockeye Salmon Run written by Steven G. Honnold and published by . This book was released on 2004 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents data collected in 2004 for a three-year study (2004-2006) assessing smolt abundance, spawning and rearing habitats of sockeye salmon in Afognak Lake.
Book Synopsis Stock Assessment and Restoration of the Afognak Lake Sockeye Salmon Run, 2008 by : Robert T. Baer
Download or read book Stock Assessment and Restoration of the Afognak Lake Sockeye Salmon Run, 2008 written by Robert T. Baer and published by . This book was released on 2009 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides the 2008 fishery and limnology results from the Afognak Lake system and fulfills annual reporting requirements to the US Fish and Wildlife Service Office of Subsistence Management, the funding agent for this project (project 07-401).
Book Synopsis Stock Assessment and Restoration of the Afognak Lake Sockeye Salmon Run, 2007 by : Robert T. Baer
Download or read book Stock Assessment and Restoration of the Afognak Lake Sockeye Salmon Run, 2007 written by Robert T. Baer and published by . This book was released on 2009 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides the 2007 fishery and limnology results from the Afognak Lake study and fulfills annual reporting requirements to the US Fish and Wildlife Service Office of Subsistence Management, the funding agent for this project (project 07-401).
Book Synopsis Stock Assessment and Restoration of the Afognak Lake Sockeye Salmon Run, 2009 by : Robert T. Baer
Download or read book Stock Assessment and Restoration of the Afognak Lake Sockeye Salmon Run, 2009 written by Robert T. Baer and published by . This book was released on 2010 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Afognak Lake sockeye salmon Oncorhynchus nerka run severely declined in 2001 and has remained low since. Concerns expressed by local subsistence users to the Alaska Department of Fish and Game and the US Fish and Wildlife Service Office of Subsistence Management prompted an investigation of the lake's rearing environment in 2003 followed by subsequent annual studies. This report provides 2009 project results, a summary of results from 2007 and 2008, and an evaluation of limnology conditions and their effects upon smolt production.
Book Synopsis Afognak Lake Sockeye Salmon Stock Monitoring Project Operational Plan, 2023-2025 by : Darin Ruhl
Download or read book Afognak Lake Sockeye Salmon Stock Monitoring Project Operational Plan, 2023-2025 written by Darin Ruhl and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This operational plan provides the instruction and procedures to properly operate the Afognak Lake adult salmon escapement weir and successfully meet each project objective. The primary function of maintaining a weir at Afognak River is to enumerate sockeye salmon Oncorhynchus nerka returning to Afognak Lake for the Alaska Department of Fish and Game (ADF&G) management of the Afognak Bay commercial, subsistence, and sport fishery. All fish passing upstream or downstream through the weir are identified, enumerated, and reported to the ADF&G office in Kodiak daily. Enumeration at the weir serves a secondary purpose by providing run timing and escapement information for Kodiak Regional Aquaculture Association (KRAA), which uses Afognak Lake sockeye salmon as an early-run brood stock source for various enhancement projects on Kodiak Island. Project activities at Afognak River weir include installation, operation, and maintenance of the weir, salmonid enumeration, record daily physical weather observation, and the collection of age, sex, and length (ASL) samples and corresponding data."--Page 1
Book Synopsis A Comprehensive Review of Chilkat Lake and River Sockeye Salmon Stock Assessment Studies by : Julie Bednarski
Download or read book A Comprehensive Review of Chilkat Lake and River Sockeye Salmon Stock Assessment Studies written by Julie Bednarski and published by . This book was released on 2017 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 1967 the Alaska Department of Fish and Game, Division of Commercial Fisheries, has operated a stock assessment program to estimate escapements and harvests of Chilkat sockeye salmon (Oncorhynchus nerka). Sockeye salmon were counted through a weir near the outlet of Chilkat Lake, and age, length, and sex data were collected and analyzed each year. Since 1994, mark-recapture studies were conducted to estimate Chilkat sockeye salmon escapements. Since the start of the 2008 season, DIDSON sonar has been used at the weir site to directly enumerate adult sockeye salmon escapement into Chilkat Lake. Visual scale pattern analysis was conducted to determine the proportion of Chilkat sockeye salmon harvested annually in the District 15 commercial drift gillnet fishery. In addition, limnological sampling was conducted in Chilkat Lake and analyzed each year. The intent of this report was to review Chilkat sockeye salmon stock assessment data from 1971 to 2016. The visual and DIDSON weir counts provide an index of escapement; however concerns regarding mark-recapture as a reliable index of abundance lead us to recommend eliminating mark-recapture studies in 2017 and, instead, maintain the DIDSON to estimate escapement into Chilkat Lake. We also recommend reviewing the current Chilkat Lake biological escapement goal to ensure that the goal and escapement estimates are in the same units, which is currently based on mark-recapture units. An average of 77,800 Chilkat Lake sockeye salmon were harvested annually in the District 15 commercial drift gillnet fishery (1976-2016). A comparison of historical fish wheel counts to Chilkat Lake escapement estimates demonstrates that the fish wheel project provides a rough indication of Chilkat Lake run strength. Zooplankton samples from Chilkat Lake were composed primarily of one species of copepod (Cyclops columbianus) and three species of cladocerans (Bosmina longerostris, Daphnia longiremus, and Daphnia rosea).
Book Synopsis Operational Plan by : Nicole L. Zeiser
Download or read book Operational Plan written by Nicole L. Zeiser and published by . This book was released on 2020 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Chilkoot Lake sockeye salmon (Oncorhynchus nerka) run, which spawns near Haines, is one of the largest in Southeast Alaska and contributes substantially to harvests in the District 15 commercial drift gillnet fishery in Lynn Canal. This operational plan outlines objectives, methods, and timelines for conducting sockeye salmon stock assessment designed to (1) estimate annual escapement and harvest, (2) provide information for inseason fishery management, and (3) reconstruct runs and assess stock status. The Chilkoot Lake run is managed for a biological escapement goal of 38,000–86,000 fish, which is enumerated through a standard picket weir located just downstream of the lake outlet. Weir counts of sockeye salmon are compared to weekly escapement targets to determine inseason run strength. Genetic mixed stock analysis of weekly sockeye salmon harvests in the District 15 commercial drift gillnet fishery provides stock composition estimates that also guide inseason management of the fishery. Biological sampling, along with escapement enumeration and stock-specific harvest data, allows for total run reconstruction required for escapement goal review.
Book Synopsis An Assessment of the Straying of Two Enhanced Sockeye Salmon Stocks on Northern Afognak Island, as Influenced by Artificial Barriers Preventing Access to Freshwater by : Jeff A. Wadle
Download or read book An Assessment of the Straying of Two Enhanced Sockeye Salmon Stocks on Northern Afognak Island, as Influenced by Artificial Barriers Preventing Access to Freshwater written by Jeff A. Wadle and published by . This book was released on 2000 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Limnological and Fisheries Assessment of Sockeye Salmon (Oncorhynchus Nerka) Production in Afognak Lake by : Lorne E. White
Download or read book Limnological and Fisheries Assessment of Sockeye Salmon (Oncorhynchus Nerka) Production in Afognak Lake written by Lorne E. White and published by . This book was released on 1990 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stock Assessment of Sockeye Salmon in the Buskin River, 2018-2021 by : Mark J. Witteveen
Download or read book Stock Assessment of Sockeye Salmon in the Buskin River, 2018-2021 written by Mark J. Witteveen and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game, Division of Sport Fish, has assessed the annual run of Buskin River sockeye salmon (Oncorhynchus nerka) on Kodiak Island, Alaska, since 1990. Buskin River sockeye salmon weir counts were 4,284, 12,297, 7,741, and 2,330 fish for 2018–2021, respectively. Weir counts for Lake Louise were 83, 73, 53, and 1,896 sockeye salmon for 2018–2021, respectively. Reported annual subsistence harvests for the Buskin River Section were 474, 836, and 1,620 sockeye salmon for 2018–2020, respectively; accurate harvest is not available for 2021 at this time. In interviews conducted with 11 subsistence users in 2019, 100% reported that the Buskin River was a traditional fishing location, and 73% reported that they subsistence fished in other areas. Interviews were not conducted in 2018 due to a low run or in 2020 and 2021 due to COVID-19. Enumerated sockeye salmon spawning escapement for the entire drainage (Buskin Lake and Louise Lake weirs) was 4,367, 12,370, 7,794, and 4,226 fish for 2018–2021, respectively. Based on a Bayesian spawner–recruitment analysis of the Buskin Lake system, estimated spawning escapement for maximum sustained yield is about 5,700 fish (95% credibility interval = 4,300–8,000). A sustained yield probability analysis supports the current Buskin Lake system biological escapement goal (BEG) range of 5,000–8,000 sockeye salmon. Age-1.2, -1.3, -2.2, and -2.3 sockeye salmon composed 93–99% of the Buskin River run. Male to female ratios for the Buskin River were between 0.6 and 1.1 to 1 for 2018–2021. Samples taken from the Lake Louise sockeye salmon run and the subsistence harvest were too low to provide reliable estimates of age and sex composition.
Book Synopsis Buskin River Sockeye Salmon Stock Assessment Operational Plan, 2022 by : Kelly M. Krueger
Download or read book Buskin River Sockeye Salmon Stock Assessment Operational Plan, 2022 written by Kelly M. Krueger and published by . This book was released on 2022 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this project is to census the sockeye salmon escapement into Buskin Lake during 2022. The age, sex, and length composition of the run (escapement and subsistence harvest combined) to Buskin Lake will also be estimated.
Book Synopsis Operational Plan by : Raymond F. Vinzant
Download or read book Operational Plan written by Raymond F. Vinzant and published by . This book was released on 2013 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary purspose of the sockeye slamon assessment project is to provide precise estimates of sockeye salmon total escapement into the Kanalku system, precise estimates of sockeye salmon spawning escapement at Kanalku Lake, and the mortality rate at the Kanalku Falls.
Book Synopsis Stock Assessment Study of Chilkat Lake and River Sockeye Salmon, 2017-2020 by : Shane R. Ransbury
Download or read book Stock Assessment Study of Chilkat Lake and River Sockeye Salmon, 2017-2020 written by Shane R. Ransbury and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: From 2017 to 2020, the Alaska Department of Fish and Game, Division of Commercial Fisheries, conducted stock assessment programs to estimate the escapement and harvest of Chilkat Lake sockeye salmon (Oncorhynchus nerka). Escapement was estimated with a Dual-frequency Identification Sonar (DIDSON) and weir near the outlet of Chilkat Lake, and age, length, and sex data were collected and analyzed each year. Sockeye salmon escapements, based on expanded DIDSON counts, were 88,197 fish in 2017, 108,047 fish in 2018, 136,091 fish in 2019, and 50,746 fish in 2020. Estimated escapements fell within the biological escapement goal range of 70,000–150,000 sockeye salmon in all but one year (2020). A pair of fish wheels were operated on the Chilkat River to provide inseason information on Chilkat sockeye salmon run strength to assist in management of the District 15 commercial drift gillnet fishery. Genetic stock identification was conducted to determine the stock composition of sockeye salmon harvested annually in the District 15 commercial drift gillnet fishery. Estimated commercial harvests of Chilkat Lake sockeye salmon were 5,698 fish in 2017, 19,235 fish in 2018, 40,935 fish in 2019, and 8,776 fish in 2020. Estimated annual harvest rates (not including subsistence or sport harvests) ranged from 6.1% (2017) to 23.1% (2019), and Chilkat Lake sockeye salmon accounted for an estimated 14.3% (2017) to 23.5% (2018) of the annual commercial sockeye salmon harvest in District 15. Zooplankton populations at Chilkat Lake have improved steadily since the late 2000s; historical peaks in the abundance of copepods and cladocerans (particularly Daphnia), the preferred prey of juvenile sockeye salmon, were observed in 2020 and 2019, respectively.
Book Synopsis 1990 State/federal Natural Resource Damage Assessment and Restoration Plan for the Exxon Valdez Oil Spill, Assessment and Restoration Plan by :
Download or read book 1990 State/federal Natural Resource Damage Assessment and Restoration Plan for the Exxon Valdez Oil Spill, Assessment and Restoration Plan written by and published by . This book was released on 1990 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Operational Plan: McDonald Lake Sockeye Salmon Stock Assessment, 2021-2023 by : Andrew W. Piston
Download or read book Operational Plan: McDonald Lake Sockeye Salmon Stock Assessment, 2021-2023 written by Andrew W. Piston and published by . This book was released on 2021 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary purpose of this project is to provide an estimate of the sockeye salmon escapement at McDonald Lake by conducting foot surveys on the spawning grounds at Hatchery Creek. We will also estimate the adult age composition of the escapement. Using results from a Pacific Salmon Treaty genetic stock identification project, we will estimate the contribution of McDonald Lake sockeye salmon to southern Southeast Alaska commercial net fisheries. This project also includes a fall hydroacoustic survey to estimate rearing juvenile sockeye salmon abundance.
Book Synopsis Buskin River Sockeye Stock Assessment Operational Plan, 2023 by : Kelly M. Krueger
Download or read book Buskin River Sockeye Stock Assessment Operational Plan, 2023 written by Kelly M. Krueger and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this project is to census the sockeye salmon escapement into Buskin Lake during 2023. The age, sex, and length composition of the run (escapement and subsistence harvest combined) to Buskin Lake will also be estimated.
