Download or read book Yukon River Chinook Salmon Subsistnce Harvest ASL and Genetic Stock Identification 2018 written by Sean D. Larson and published by . This book was released on 2020 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the age, sex, length, and stock of origin of Chinook salmon Oncorhynchus tshawytscha, caught in subsistence fisheries of the Yukon River is important for making well informed management decisions and forecasting salmon runs. The objective of this study was to collect representative genetic mixed stock analysis information, coupled with age, sex, and length data, from the Chinook salmon subsistence harvest in the Coastal District and Districts 1–5. A total of 43 subsistence fishermen from 13 communities sampled 1,573 Chinook salmon that were harvested using gillnets, fish wheels, and dip nets. The age, sex, and length composition of the harvest was 0.3% age-3, 16.9% age-4, 47.1% age-5, 33.9% age-6, 1.8% age-7, 32.5% female, and an average of 725 mm in length. The proportion of the catch that was Canadian-origin ranged from 0.38 in District 2 to 0.72 in District 5. The data generated from this project are essential to estimate total run size of Yukon River Chinook salmon stocks, evaluate boarder passage and harvest share agreements as defined in the Pacific Salmon Treaty, and update spawner-recruit models used to estimate past and future run productivity. Due to the variability in Chinook salmon runs, management actions, and harvest, annual monitoring of the subsistence Chinook salmon harvest is needed.
Download or read book Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River 2006 written by William D. Templin and published by . This book was released on 2008 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River in 2004 written by and published by . This book was released on 2006 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River 2007 written by Nicholas A. Decovich and published by . This book was released on 2009 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses significant genetic variation among populations of Chinook salmon within the Yukon River drainage, which has been used to provide estimates of stock composition of fishery harvests since the early 1990s.
Download or read book Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River 2010 written by Nicholas A. Decovich and published by . This book was released on 2011 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses significant genetic variation among populations of Chinook salmon (Oncorhynchus tshawytscha) within the Yukon River drainage; this data has been used to provide estimates of the composition of mixed stock fishery harvests since the early 1990s.
Download or read book Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River 2009 written by Nicholas A. Decovich and published by . This book was released on 2010 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses significant genetic variation among populations of Chinook salmon (Oncorhynchus tshawytscha) within the Yukon River drainage, which has been used to provide estimates of the composition of mixed stock fishery harvests since the early 1990s.
Download or read book Genetic Stock Identification of Chinook Salmon Harvests on the Yukon River 2005 written by William D. Templin and published by . This book was released on 2006 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Stock Identification of Chinook Salmon Harvest on the Yukon River 2008 written by Nicholas A. Decovich and published by . This book was released on 2010 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses significant genetic variation among populations of Chinook salmon within the Yukon River drainage, which has been used to provide estimates of the composition of mixed stock fishery harvests since the early 1990s.
Download or read book Genetic Stock Identification of Chum Salmon Onchorhynchus Keta from the Yukon River District 5 Subsistence Fishery written by William J. Spearman and published by . This book was released on 1997 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phenotypic Characterization of Chinook Salmon in the Yukon River Subsistence Harvest written by Catherine F. Moncrieff and published by . This book was released on 2005 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Subsistence fishers from the villages of the lower and middle Yukon River traditionally harvest chinook salmon (Oncorhynchus tshawytscha) that they describe as whitenose, blackhead, and blueback salmon. There is speculation that these fish represent distinct runs that may include Canadian origin fish. The run and harvest timing of these types of fish are generally predictable which implies they may be different stocks. If these fish can be identified as separate stocks, direct phenotypic identification of fish stocks could prove to be a useful management tool for the subsistence fisheries with implications to direct studies in fish biology, stock status and trends, and harvest monitoring. This project incorporated traditional ecological knowledge (TEK) of the subsistence harvest with the scientific method of genetic analysis and scale pattern analysis to determine stock status. Goals of this project were to learn how Yukon fishers characterize two phenotypes of Chinook salmon and to learn through TEK specific information about each phenotype including run quality, run timing, spawning, meat quality and local uses.
Download or read book Genetic Stock Identification of Yukon River Chum and Chinook Salmon 1987 to 1990 written by Richard L. Wilmot and published by . This book was released on 1992 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Stock Composition of the Commercial Harvest of Chinook Salmon in Copper River District 2018 2021 written by Andrew W. Barclay and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon are harvested in subsistence, commercial, sport, and personal use fisheries throughout the Copper River drainage and in nearshore marine waters. This project was designed to estimate the stock-specific harvest of Chinook salmon in the Copper River District commercial drift gillnet fishery using genetics samples from 2018 through 2021. This project applied the available baseline of genetic information representing Chinook salmon populations from within the Copper River drainage, around the Gulf of Alaska, and from southern populations to estimate the relative stock compositions of Chinook salmon harvests in the Copper River District commercial fishery. The results show that most of the fish in the Copper River commercial fishery originated from Copper River populations, which is consistent with findings from previous studies. The consistent temporal pattern in the composition of the commercial fishery harvests observed in previous studies was also observed across the 4 years of this study. As the season progressed, the proportion of Upper Copper River Chinook salmon decreased, and the proportion of Lower Copper River Chinook salmon increased. The results support a historical commercial management approach of providing inriver passage for all temporal components of the run. Genetic data allow for estimating the stock-specific harvests of wild stocks or stocks (with and without coded wire tags) from other areas.
Download or read book Genetic Stock Composition of the Commercial Harvest of Chinook Salmon in Copper River District 2013 2017 written by Sara Ellen Gilk and published by . This book was released on 2017 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon are harvested in subsistence, commercial, sport, and personal use fisheries throughout the Copper River drainage and in nearshore marine waters. This project was designed to estimate the stock-specific harvest of Chinook salmon in the Copper River District commercial drift gillnet fishery using genetics samples from 2013 through 2017. The Chinook Salmon Research Initiative identified the Copper River as 1 of 12 indicator stocks representing the diverse life history and migratory characteristics of Alaska Chinook salmon. Adult abundance information was identified as a fundamental knowledge gap, including the absence of programs to estimate stock-specific harvest in mixed stock commercial fisheries. This project applied the available baseline of genetic information representing Chinook salmon populations from within the Copper River drainage, around the Gulf of Alaska, and from southern populations to estimate the relative stock compositions of Chinook salmon harvests in the Copper River District commercial fishery. The results show that most of the fish in the Copper River commercial fishery originated from Copper River populations, which is consistent with findings from previous studies. A consistent temporal pattern in the composition of the commercial fishery harvests was observed across the 5-year study. As the season progressed, the proportion of Upper Copper River Chinook salmon decreased, and the proportion of Lower Copper River Chinook salmon increased. The unusually high proportions of nonlocal Chinook salmon in the commercial harvest occurring during 2 of the study years (2014 and 2015) align with other reports of large numbers of out-of-area Chinook salmon in commercial fisheries throughout the southern and southeastern seaboards of Alaska. The results support the historical commercial management approach of providing inriver passage for all temporal components of the run. Genetic data allow for estimating the stock-specific harvests of wild stocks or stocks (with and without coded wire tags) from other areas.
Download or read book Genetic Stock Identification of Copper River Chinook Salmon Harvest 2005 2008 written by William D. Templin and published by . This book was released on 2011 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the preparation of a comprehensive genetic baseline representing Chinook salmon populations across the Gulf of Alaska and south to California, and the use of this baseline to estimate the relative stock composition of Chinook salmon harvests in the Copper River District commercial fishery from 2005 to 2008.
Download or read book Origins of Chinook Salmon in the Yukon River Fisheries 2009 written by Larry DuBois and published by . This book was released on 2013 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports on estimations of the stock composition of all harvests and test fishery catches of Chinook salmon, Oncorhynchus tshawytscha, within the Yukon River drainage in 2009. Stock composition was estimated for 3 geographically-based stock groups termed Lower, Middle, and Upper, and commercial and subsistence harvest age compositions were estimated from aged scales collected. Age compositions from sampled fish, in combination with genetic stock estimates, were used to estimate the stock composition for each age class. Also includes historical data from 1981-2008.
Download or read book Origins of Chinook Salmon in the Yukon River Fisheries 2010 written by Larry DuBois and published by . This book was released on 2013 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports on estimations of the stock composition of all harvests and test fishery catches of Chinook salmon, Oncorhynchus tshawytscha, within the Yukon River drainage in 2010. Stock composition was estimated for 3 geographically-based stock groups termed Lower, Middle, and Upper, and commercial and subsistence harvest age compositions were estimated from aged scales collected. Age compositions from sampled fish, in combination with genetic stock estimates, were used to estimate the stock composition for each age class. Also includes historical data from 1981-2009.
Download or read book Origins of Chinook Salmon in the Yukon River Fisheries 2008 written by Heather Leba and published by . This book was released on 2011 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports on estimations of the stock composition of all harvests and test fishery catches of Chinook salmon, Oncorhynchus tshawytscha, within the Yukon River drainage in 2008. Stock composition was estimated for 3 geographically-based stock groups termed Lower, Middle, and Upper, and commercial and subsistence harvest age compositions were estimated from aged scales collected. Age compositions from sampled fish, in combination with genetic stock estimates, were used to estimate the stock composition for each age class. Also includes historical data from 1981-2008.
