Download or read book Assessment of the Canadian and Alaskan Sockeye Stocks Harvested in the Northern Boundary Fisheries Using Run Reconstruction Techniques 1982 2001 written by and published by . This book was released on 2004 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of Sockeye and Pink Salmon Stocks in the Northern Boundary Area Using Run Reconstruction Techniques 1982 95 written by Canada. Department of Fisheries and Oceans and published by [Prince Rupert, B.C.] : Fisheries and Oceans Canada. This book was released on 2000 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stikine River Sockeye Salmon Stock Assessment 2021 written by Julie Bednarski and published by . This book was released on 2021 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2021 forecast of Stikine River sockeye salmon, Oncorhynchus nerka, run abundance is poor and we anticipate very little harvesting opportunity for either U.S. or Canadian fisheries. Since 1994, we have almost exclusively relied on the Canadian lower river commercial fishery to provide the migratory timing information that is used to complete the mixed stock run reconstruction for Stikine River sockeye salmon. It is highly likely there will be no fishing opportunity in 2021 to gather this pertinent information. To obtain stock composition data necessary to estimate the inriver abundance, we are initiating a sockeye salmon stock assessment program at Kakwan Point. The project will be conducted in conjunction with the existing Stikine River Chinook salmon, O. tshwaytscha, assessment program, and will extend the project through the end of the sockeye salmon run in late August. Tissue samples will be collected from sockeye salmon for genetic mixed stock analysis and for use in a genetic mark–recapture study to estimate inriver abundance based on an expansion of the Tahltan stock that is monitored via weir. We will also gather daily catch per unit effort (CPUE) information and estimate the age, sex and length (ASL) composition for sockeye salmon captured. This stock assessment program is designed to capture sockeye salmon in proportion to abundance during immigration; therefore, it is expected that it will provide an unbiased estimate of abundance. This estimate will be assessed by TTC postseason for use in the Stikine River sockeye salmon run reconstruction.

Download or read book Contribution of Alaskan Canadian and Transboundary Sockeye Salmon Stocks to Catches in Southeast Alaska Purse Seine and Gillnet Fisheries Districts 101 108 Based on Analysis of Scale Patterns 2002 written by Richard A. Bloomquist and published by . This book was released on 2010 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sockeye salmon (Oncorhynchus nerka) harvested in 2002 in southern Southeast Alaska's gillnet and purse seine fisheries were classified to nation or stock group of origin by using linear discriminant function analysis of scale patterns, coupled with age composition data. The general groups were Alaskan, Canadian, and transboundary river stocks. Separate Canadian stock contribution estimates (Nass River, Skeena River, and other south-migrating stocks) are presented for some districts. Stock contribution estimates are presented by age class and week for all major fisheries.

Download or read book Contribution of Alaskan Canadian and Transboundary Sockeye Salmon Stocks to 1992 Catches in Southeast Alaska Purse Seine and Gillnet Fisheries Districts 101 108 Based on Analysis of Scale Patterns written by Craig W. Farrington and published by . This book was released on 1996 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Sockeye salmon Oncorhynhus nerka harvested in southern Southeast Alaska's 1992 gillnet and purse seine fisheries were classified to nation and/or stock of origin using linear discriminant function analysis of scale patterns and age composition data"--Abstract.

Download or read book Mark recapture Studies of Taku River Adult Sockeye Salmon Stocks from 1998 to 2002 written by James Everett Andel and published by . This book was released on 2004 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annual mark-recapture studies of adult Taku River sockeye salmon (Oncorhyncus nerka) stocks were conducted by the Alaska Department of Fish and Game, the Canadian Department of Fisheries and Oceans and the Taku River First Nation from 1998 to 2002. The objectives of the program were: to provide annual inseason estimates of the inriver abundance of sockeye salmon and to document biological characteristics (migratory timing, migratory rates and age, sex, and size composition) of Taku River sockeye stocks. Marked-to unmarked ratios of salmon harvested in the Canadian inriver gillnet fisheries were used to develop estimates of the inriver abundance of sockeye. During the years 1998 to 2002, an annual averageof 5,349 sockeye salmon were tagged in fish wheels located at Canyon Island, Alaska, of which an average of 1,080 (20.2%) sockeye were subsequently recovered in fisheries or on the spawning grounds.The annual post-season inriver runestimates of sockeye salmon past Canyon Island from 1998 to 2002 was estimated to be 91,548, 113,705, 115,693, 192,269, and 135,233, fish respectively. Annual inriver Canadian commercial, aboriginal and test fisheries combined harvested 19,038, 20,681, 27,942, 47,998, and 31,053 sockeye salmon during those same years (1998 to 2002). The resulting annual spawning escapement estimtes for Taku River sockeye salmon from 1998 to 2002 was 72,271, 95,562, 87,298, 144,071, 103,343, fish respectively.The migratory timing (mean dates and standard deviation of migration) and run timing of the sockeye salmon run was similar to the 15 year average. The Kuthai Lake sockeye salmon stocks dominated the early portion, the Little Trapper Lake the middle portion, and the Tatsamenie Lake and mainstem stocks the late portion of the Taku River sockeye salmon run. Pink fish wheel catches were strong in 1998 and 1999 but below average in 2000 to 2002. Chum salmon fish wheel catches for this 5-year period continued to exhibit the trend of low catches that began in the mid-1980's.

Download or read book Contribution of Alaskan Canadian and Transboundary Sockeye Salmon Stocks to 1991 Catches in Southeast Alaska Purse Seine and Gillnet Fisheries Districts 101 108 Based on Analysis of Scale Patterns written by Craig W. Farrington and published by . This book was released on 1996 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Sockeye salmon Oncorhynhus nerka harvested in southern Southeast Alaska's 1991 gillnet and purse seine fisheries were classified to nation and/or stock of origin using linear discriminant function analysis of scale patterns and age composition data"--Abstract.

Download or read book Contribution of Alaskan Canadian and Transboundary Sockeye Salmon Stocks to 1990 Catches in Southeast Alaska Purse Seine and Gillnet Fisheries Districts 101 108 Based on Analysis of Scale Patterns written by Craig W. Farrington and published by . This book was released on 1994 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Sockeye salmon Oncorhynhus nerka harvested in southern Southeast Alaska's 1990 gillnet and purse seine fisheries were classified to nation and/or stock of origin using linear discriminant function analysis of scale patterns and age composition data"--Abstract.

Download or read book Genetic Mixed Stock Analysis of Upper Cook Inlet Sockeye Salmon Harvest 2014 written by Andrew W. Barclay and published by . This book was released on 2018 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetic mixed stock analysis has been used to estimate the stock compositions of sockeye salmon Oncorhynchus nerka harvested in commercial fisheries in Upper Cook Inlet (UCI), Alaska, since 2005. Here we report the genetic mixed stock analysis of samples representing 90.5% of the 2014 UCI commercial fishery harvests. Postseason analyses were performed using a previously reported baseline of 69 populations and 96 single nucleotide polymorphic markers, with the addition of 2 populations in the West reporting group (Harriet Creek and Packers Lake late run). Some stock composition patterns in the commercial fishery were similar to previous years. Drift gillnet and eastern fisheries captured greater proportions of Kenai and Kasilof rivers fish than western and northern fisheries; western set gillnet fisheries harvested a greater proportion of fish from the west side of Cook Inlet, but the drift gillnet fishery harvested greater numbers of west side fish; set gillnet fisheries closer to the Kenai or Kasilof river mouths harvested larger proportions of fish from those rivers; and set gillnet fishing areas in the Northern District generally harvested fish from nearby rivers. Unexpectedly, Susitna River fish made up a higher fraction of the drift gillnet harvest when the fleet was restricted to eastern Cook Inlet waters than when they were not restricted to eastern waters. Estimates of stock-specific harvests for UCI commercial fisheries in 2014 build upon previous years in refining understanding of productivity and the effect of management actions on the stock composition of commercial sockeye salmon harvests.

Download or read book Reconstruction of the Total Return of Sockeye Salmon Oncorhynchus Nerka to the Skeena River for Brood Years 1965 to 1982 written by and published by . This book was released on 1989 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has long been known that sockeye salmon returning to the Skeena River as maturing adults are harvested in numerous fisheries both in B.C. and Alaska. Since 1982, several investigations have been carried out, designed to provide estimates of the proportion of the catch taken in major net fisheries in northern B.C. and southern southeast Alaska that was of Skeena River origin. This study used these estimates of stock composition to reconstruct the total size of the return of sockeye salmon to the Skeena River for brood years from 1965-82. Age structure information was used to apportion the catch and escapement to the appropriate brood year. The proportion of the catch in each of the major interception fisheries from 1982-87 was based on a series of studies using tagging, genetic, scale pattern and parasite markers. Three different procedures were used to estimate stock composition for the years prior to 1982 and for 1988. The total run size estimates from each of the 3 procedures are compared.

Download or read book Inriver Abundance of Stikine River Sockeye Salmon 2022 2024 written by Kristin Courtney and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2022 forecast of Stikine River sockeye salmon, Oncorhynchus nerka, run abundance is poor and we anticipate very little harvest opportunity for either U.S. or Canadian fisheries. Since 1994, we have almost exclusively relied on the Canadian lower river commercial fishery to provide the stock-specific information that is used to complete the mixed stock run reconstruction for Stikine River sockeye salmon. It is highly likely there will be little commercial fishing opportunity in 2022 to gather this pertinent information. To obtain stock composition data necessary to estimate the inriver abundance, we will continue to conduct a sockeye salmon stock assessment program at Kakwan Point that began in 2021. The project will be conducted in conjunction with the existing Stikine River Chinook salmon, O. tshwaytscha, stock assessment program, and will extend the project through the end of the sockeye salmon run in mid-August. Tissue samples will be collected from sockeye salmon for genetic mixed stock analysis and for use in a genetic mark–recapture study to estimate inriver abundance based on an expansion of the Tahltan stock that is monitored via weir. We will also gather daily CPUE information, capture and spaghetti tag sockeye salmon, and estimate the age, sex, and length composition for sockeye salmon captured at Kakwan Point.

Download or read book Mark recapture Studies of Taku River Adult Sockeye Salmon Stocks in 2003 written by I. Boyce and published by . This book was released on 2005 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mark-recapture studies of adult Taku River sockeye salmon (Oncorhyncus nerka) stocks were conducted by the Alaska Department of Fish and Game and the Taku River Tlingit First Nation in 2003. The objectives of the studies were to provide inseason estimates of the inriver abundance of sockeye O. nerka and to document biological charactieristics (migratory timing, migratory raes and age, sex, and size composition) of Taku River sockeye stocks. Tagged-to-untaggedratios of salmon harvested in the Canadian inriver gillnet fisheries were used to develop the estimates of the inriver abundance of sockeye. A total of 5,969 sockeye salmon were captured in fish wheels located in Canyon Island, Alaska, of which 5,463, were tagged and 1,744 (31.9%) were subsequently recovered in fisheries or on the spawning grouds. The inriver run of sockeye salmon past Canyon Island from June 5 to September 17 was estimated to be 200,918 fish (95% confidence interval 180,905 to 220,931). Canadian commercial, aboriginal and test fisheries harvested 32,933, 267 and 27 sockeye, respectively, resulting in a spawning escapement estimate estimate of 167,691 sockeye salmon. Based on mean date and standard deviation of migration timing the sockeye salmon run was approximately one day earlier and more compressed than the 1984-2002 average. The Kuthai Lake sockeye salmon stocks dominated the early portion of the run, the Little Trapper Lake the middle portion, and the Tatsamenie Lake and mainstem stocks the late portion. The fish wheel catches of 15,604 pink salmon, 262 chum salmon, and 49steelhead salmon were 2.8%, 50.8% below average and 29,7% above average, respectively. The pinksalmon run was five days earlier and slightly more compressed than average.

Download or read book Genetic Stock Identification of Upper Cook Inlet Sockeye Salmon Harvest 2012 2013 written by Andrew W. Barclay and published by . This book was released on 2017 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixed stock analysis based on genetic data has been used to estimate the stock compositions of sockeye salmon Oncorhynchus nerka harvested in commercial fisheries in Upper Cook Inlet (UCI), Alaska, since 2005. Here we report the genetic mixed stock analysis samples representing 99% of the 2012 and 2013 UCI commercial fishery harvests. Postseason analyses were performed using a previously reported baseline of 69 populations and 96 single nucleotide polymorphic markers, with the addition of 2 populations in the West reporting group (Harriet Creek and Packers Lake late run). Stock composition patterns in the commercial fishery were similar to previous years: eastern fisheries generally captured more Kenai and Kasilof rivers fish than western and northern fisheries; and gillnet fisheries closer to the Kenai or Kasilof river mouths harvested larger proportions of fish from those rivers. In 2012, however, the majority of Kasilof fish were harvested in the drift gillnet fisheries due to restrictions on the set gillnet fishery. Most stocks contributed similar proportions to the overall harvest in the UCI fishery compared to previously reported years, but Fish and Kasilof stocks were 38-86% below average and Susitna/Yentna River stocks were 19-77% above average. In 2013, 2 additional drift gillnet samples were analyzed to compare harvests in the Kenai and Kasilof expanded corridor (July 11) with the districtwide harvest (July 8). Kenai and Kasilof estimates were higher in the corridor sample than the districtwide sample, whereas estimates for the remaining reporting groups were generally lower, but these differences were not significant and could be attributed to the difference in sampling date. Estimates of stock-specific harvests for UCI commercial fisheries in 2012 and 2013 build upon previous years in refining understanding of productivity and the effect of management actions on the stock composition of commercial sockeye salmon harvests.

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.

Download or read book Contribution of Alaskan Canadian and Transboundary Sockeye Salmon Stocks to Catches in Southeast Alaska Purse Seine and Gillnet Fisheries Districts 101 108 Based on Analysis of Scale Patterns 2006 written by John A. Wilcock and published by . This book was released on 2011 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Contribution of Alaskan Canadian and Transboundary Sockeye Salmon Stocks to Catches in Southeast Alaska Purse Seine and Gillnet Fisheries Districts 101 108 Based on Analysis of Scale Patterns 2005 written by John A. Wilcock and published by . This book was released on 2011 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: