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Estimation Of Chinook Salmon Abundance And Spawning Distribution In The Unalakleet River 2009
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Book Synopsis Estimation of Chinook Salmon Abundance and Spawning Distribution in the Unalakleet River, 2009 by : Philip John Joy
Download or read book Estimation of Chinook Salmon Abundance and Spawning Distribution in the Unalakleet River, 2009 written by Philip John Joy and published by . This book was released on 2014 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimation of Chinook Salmon Abundance and Spawning Distribution in the Unalakleet River, 2010 by : Philip John Joy
Download or read book Estimation of Chinook Salmon Abundance and Spawning Distribution in the Unalakleet River, 2010 written by Philip John Joy and published by . This book was released on 2014 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Susitna River Chinook Salmon Abundance and Distribution, 2018–2020 by : Nicholas A. Decovich
Download or read book Susitna River Chinook Salmon Abundance and Distribution, 2018–2020 written by Nicholas A. Decovich and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adult Chinook salmon abundance and distribution were estimated for the Susitna River drainage in 2018–2020 for the 6th through 8th consecutive years. Abundance estimates for the mainstem Susitna River above river mile (RM) 34 were produced using mark–recapture techniques to deploy tags on fish caught via fish wheel and gillnet at a site in the lower river (RM 34) and recover tags using a passive integrated transponder (PIT) tag detection system at the Deshka River weir site. Spawning distribution was assessed with radiotelemetry for 2019 and 2020 only. Fish were radiotagged at the lower river tag deployment site and tracked along their spawning migration with an array of fixed-antenna tracking stations. Upstream movement of each tag was categorized into 1 of 5 stocks: Chulitna River, upper Susitna River (RM 102.4–153.4), Deshka River, Eastside Susitna River, or Talkeetna River. The estimated mainstem Susitna River abundance at RM 34 (and 95% confidence intervals) of Chinook salmon ≥500 mm mid eye to tail fork (METF) length for 2018, 2019, and 2020 were 30,605 (23,262–40,396), 57,927 (42,843–78,118), and 62,346 (45,245–87,888), respectively. For 2018–2019, the abundance estimated for Chinook salmon in the Eastside Susitna River group was 14,121 (SE = 3,473) and 21,933 (SE = 5,107) fish, respectively, and accounted for the largest proportions (24% and 35%, respectively) of the mainstem Susitna River estimate.
Book Synopsis Abundance, Distribution, and Surveys of Spawning Chinook Salmon 2012-2014 and Spawning Coho Salmon 2013-2014 in the Susitna River by : Richard J. Yanusz
Download or read book Abundance, Distribution, and Surveys of Spawning Chinook Salmon 2012-2014 and Spawning Coho Salmon 2013-2014 in the Susitna River written by Richard J. Yanusz and published by . This book was released on 2018 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Between 2012 and 2014, information was collected on the distributions and abundances of adult Chinook (Oncorhynchus tshawytscha) and coho (O. kisutch) salmon as part of the Susitna-Watana Hydro studies conducted by the Alaska Department of Fish and Game in partnership with LGL Alaska Research Associates Inc. and the Alaska Energy Authority. Spawning distributions were assessed using radiotelemetry for Chinook salmon in the mainstem Susitna River in 2012-2014 and in the Yentna River in 2013 and 2014, and for coho salmon in the mainstem Susitna River in 2013 and 2014 only. Inriver abundances for both species were estimated using mark-recapture techniques in 2013 and 2014 for the mainstem Susitna River and for Chinook salmon in the Yentna River in 2014. For Chinook salmon, these abundance estimates were combined with telemetry data to estimate individual management unit-specific abundances which were then used to calculate the percent contribution of each to total abundance. In both 2013 and 2014, all units but unit 3 (upper Susitna River) contributed nearly equally (21-27%) to the total mainstem Susitna River Chinook salmon inriver run. When the Yentna River estimate was included with estimates for the other management units in 2014, the Yentna River contributed 25% to the drainagewide inriver run; units 1, 2, 5, and 6 contributed 15-19% each; and unit 3 contributed 7%. Sport harvest was subtracted from the mark-recapture inriver abundance to estimate escapement which was then compared to aerial indexes and weir counts. For Chinook salmon, index and weir counts counted 34-39% of the escapement on the mainstem Susitna River and 36% on the Yentna River. For coho salmon, the Deshka River weir counted 19% and 16% of the Sustina River escapements in 2013 and 2014, respectively. Foot counts of coho salmon escapement for 4 streams on the mainstem Susitna River accounted for an average of 0.9% of the escapement over 2013-2014.
Book Synopsis Spawning Abundance of Chinook Salmon in the Taku River from 2008 to 2010 by : Edgar L. Jones (III)
Download or read book Spawning Abundance of Chinook Salmon in the Taku River from 2008 to 2010 written by Edgar L. Jones (III) and published by . This book was released on 2018 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: A cooperative study involving the Alaska Department of Fish and Game, Department of Fisheries and Oceans Canada, and the Taku River Tlingit First Nation was conducted to estimate the number of spawning Chinook salmon Oncorhynchus tshawytscha in the Taku River from 2008 to 2010 using mark–recapture methodology. Fish were captured annually near Canyon Island in the lower Taku River using fish wheels and set gillnets from late April through early August and were tagged using back-sewn, individually numbered, solid-core spaghetti tags. Two secondary marks, a left operculum punch and a left axillary finclip, were applied in case the primary spaghetti tag was lost between tagging and recapture. Sampling in the lower river assessment and Canadian commercial fisheries, and on the spawning grounds was used to estimate the fraction of the population that had been marked. Spawning abundance of large-sized Chinook salmon (≥660 mm mid-eye to fork of tail) was estimated at 26,645 (SE = 3,010) in 2008, 22,761 (SE = 2,871) in 2009, and 28,769 (SE = 2,546) in 2010. Spawning abundance of medium-sized Chinook salmon (401–659 mm mid -eye to fork of tail) was estimated at 12,889 (SE = 2,559) in 2008, 10,231 (SE = 1,788) in 2009, and 7,310 (SE = 935) in 2010.
Book Synopsis Estimation of the Escapement of Chinook Salmon in the Unuk River in 2003 by : Jan L. Weller
Download or read book Estimation of the Escapement of Chinook Salmon in the Unuk River in 2003 written by Jan L. Weller and published by . This book was released on 2004 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Distribution and Relative Abundance of Deep-water Redds for Spawning Fall Chinook Salmon at Selected Study Sites in the Hanford Reach of the Columbia River by : George A. Swan
Download or read book Distribution and Relative Abundance of Deep-water Redds for Spawning Fall Chinook Salmon at Selected Study Sites in the Hanford Reach of the Columbia River written by George A. Swan and published by . This book was released on 1988 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Juvenile Chinook Salmon Abundance Index and Survey Feasibility Assessment in the Northern Bering Sea, 2014-2016 by : Kathrine G. Howard
Download or read book Juvenile Chinook Salmon Abundance Index and Survey Feasibility Assessment in the Northern Bering Sea, 2014-2016 written by Kathrine G. Howard and published by . This book was released on 2019 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-term monitoring of juvenile Chinook salmon Oncorhynchus tshawytscha is needed to identify recruitment and mortality processes, to understand early marine biology and ecology, and develop tools useful for fisheries management. A sampling program for Yukon River salmon was established in the northern Bering Sea in 2003 but annual sampling has been tenuous due to funding limitations. This project was designed to maintain the sampling program for Yukon River stocks, develop a genetic baseline to identify Yukon River stocks, and evaluate a lower cost survey alternative using a smaller vessel and trawl configuration. Results indicated that the genetic baseline can identify four groups of populations from Western Alaska, the two vessel/trawl configurations provided similar estimates of juvenile Chinook salmon abundance (within 20%); however, sea state limitations of the small vessel required an earlier survey timing (August rather than September). The change in survey timing contributed to differences in the spatial distribution and length of salmon caught during the 2 surveys. Surveys identified above average juvenile Chinook salmon abundance during 2014-2016 and above average juvenile abundance per spawner in 2014 and 2015. Both indicate an improvement to the recent poor production of Yukon River Chinook salmon, because juvenile abundance in the northern Bering Sea is known to be a leading indicator of adult returns for this stock. Sampling 2 different time periods provided additional insight into the early marine growth rates of juvenile Yukon River Chinook and other salmon species. Average Chinook salmon growth rate was 1.55 mm per day from marine entry to August, and 1.06 mm per day from August through September. This project represents a critical step to enable the long-term monitoring of juvenile Chinook salmon in Western Alaska and continued pursuit of factors that determine productivity and cohort strength of Yukon River Chinook salmon.
Book Synopsis Inriver Abundance, Spawning Distribution, and Run Timing of Copper River Chinook Salmon in 2002 by : James William Savereide
Download or read book Inriver Abundance, Spawning Distribution, and Run Timing of Copper River Chinook Salmon in 2002 written by James William Savereide and published by . This book was released on 2003 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimation of Abundance and Distribution of Chinook Salmon in the Yukon River Using Mark-recapture and Radio Telemetry in 2000 and 2001 by : Ted R. Spencer
Download or read book Estimation of Abundance and Distribution of Chinook Salmon in the Yukon River Using Mark-recapture and Radio Telemetry in 2000 and 2001 written by Ted R. Spencer and published by . This book was released on 2003 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this multi-year (1999-2002) cooperative study between the Alaska Department of Fish and Game and the National Marine Fisheries Service was to determine the migratory characteristics and escapement distribution of Yukon River chinook salmon. Primary objectives in 2000 and 2001 were to assess and refine fish capture and radio-tracking methods for a full-scale program in 2002, and to estimate drainage-wide population size using mark-recapture techniques.
Book Synopsis Inriver Abundance, Spawning Distribution, and Run Timing of Copper River Chinook Salmon, 2002-2004 by : James William Savereide
Download or read book Inriver Abundance, Spawning Distribution, and Run Timing of Copper River Chinook Salmon, 2002-2004 written by James William Savereide and published by . This book was released on 2005 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inriver Abundance, Spawning Distribution, and Migratory Timing of Copper River Chinook Salmon in 2001 by : James William Savereide
Download or read book Inriver Abundance, Spawning Distribution, and Migratory Timing of Copper River Chinook Salmon in 2001 written by James William Savereide and published by . This book was released on 2002 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Susitna River Chinook Salmon Run Reconstruction and Escapement Goal Analysis by : Adam M. Reimer
Download or read book Susitna River Chinook Salmon Run Reconstruction and Escapement Goal Analysis written by Adam M. Reimer and published by . This book was released on 2020 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Susitna River drains approximately 52,000 square kilometers of the southern slopes of the Alaska Range and the Talkeetna mountains. This watershed supports wild populations of all 5 species of Pacific salmon and vibrant sport fisheries when production allows. Chinook salmon spawning escapements have been monitored since the late 1970s by aerial survey and a weir has been used to count returning adults on the Deshka River (a tributary) since 1995. The Deshka River is currently managed by an escapement goal based on weir passage whereas several other spawning populations are managed using escapement goals based only on once-per-year aerial surveys. Other fishery data, such as inriver and marine harvest estimates, age estimates, recent mark–recapture abundance estimates, and spawner distribution data are also available. We present a state-space model that incorporates all available datasets to generate annual inriver and spawning escapement abundance estimates of 4 stocks of Susitna River Chinook salmon. These stocks were created by dividing the drainage into geographical units similar to existing management units used in Alaska Department of Fish and Game sport fishing regulations: Deshka River, Eastside Susitna, Talkeetna River, and Yentna River. The state-space model estimates a spawner-recruitment (S-R) relationship for each stock that is used in developing escapement goal recommendations based on the number of spawners that provide maximum sustained yield (SMSY). SMSY was estimated for each stock: 12,564 for Deshka River; 12,971 for Eastside Susitna; 10,570 for Talkeetna River; and 13,614 for Yentna River. We used a decision matrix to choose escapement goals based on the probability of achieving maximum sustained yield for the 4 stocks. We recommend discontinuing escapement goals for individual spawning populations within these stocks and replacing them with stock-based escapement goals of 9,000–18,000 for Deshka River, 13,000–25,000 for Eastside Susitna, 9,000–17,500 for Talkeetna River, and 13,000–22,000 for Yentna River stocks.
Book Synopsis Inriver Abundance, Spawning Distribution, and Run Timing of Copper River Chinook Salmon in 2003 by : James William Savereide
Download or read book Inriver Abundance, Spawning Distribution, and Run Timing of Copper River Chinook Salmon in 2003 written by James William Savereide and published by . This book was released on 2004 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inriver Abundance, Spawning Distribution, and Migratory Timing of Copper River Chinook Salmon in 2000 by : Klaus G. Wuttig
Download or read book Inriver Abundance, Spawning Distribution, and Migratory Timing of Copper River Chinook Salmon in 2000 written by Klaus G. Wuttig and published by . This book was released on 2001 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inriver Abundance, Spawning Distribution, and Migratory Timing of Copper River Chinook Salmon in 1999 by : Matthew J. Evenson
Download or read book Inriver Abundance, Spawning Distribution, and Migratory Timing of Copper River Chinook Salmon in 1999 written by Matthew J. Evenson and published by . This book was released on 2000 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spawning Abundance of Chinook Salmon in the Taku River in 2003 by :
Download or read book Spawning Abundance of Chinook Salmon in the Taku River in 2003 written by and published by . This book was released on 2006 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: A cooperative study involving the Department of Fisheries and Oceans Canada, the Alaska Department of Fish and Game, and the Taku River Tlingit First Nation was conducted to estimate the number of spawning Chinook salmon Oncorhynchus tshawytscha in the Taku River in 2003 with a mark-recapture experiment. Fish were captured at Canyon Island on the lower Taku River with fish wheels from May through August and were individually marked with back-sewn, solid-core spaghetti tags. All tagged fish were also batch marked with an opercle punch plus removal of the left axillary appendage. Sampling on the spawning grounds in tributaries was used to estimate the fraction of the population that had been marked. The estimated spawning abundance of small Chinook salmon ( 400 mm long; mid-eye to fork of tail) was 3,489 (SE = 1,052). Spawning abundance of medium-size Chinook salmon (401-659 mm) was estimated to be 16,780 (SE = 2,274). Finally, spawning abundance of large-size fish (= 660 mm) was estimated to be 36,435 (SE = 6,705), and the estimated total of all fish was 56,704 (SE = 7,158). The sum of the peak aerial survey counts of large spawning Chinook salmon conducted at five index tributaries of the Taku River was 16% of the mark-recapture estimate. Age 1.3 fish (1998 brood year) constituted an estimated 40% of the spawning population, followed by age 1.2 fish (1999 brood year), which constituted an estimated 29% of the population
