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Alexander Creek Chinook Salmon Stock Assessment 2016 And 2017
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Book Synopsis Alexander Creek Chinook Salmon Stock Assessment, 2016 and 2017 by : Nick Logelin
Download or read book Alexander Creek Chinook Salmon Stock Assessment, 2016 and 2017 written by Nick Logelin and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon (Oncorhynchus tshawytscha) were enumerated in 2016 and 2017 using a resistance board weir at river kilometer 21 of Alexander Creek in the Northern Cook Inlet Management Area. A lack of funding in 2016 and 2017 lead to abbreviated field seasons that concluded on August 9 and July 25, respectively. In 2016, the total Chinook salmon escapement to Alexander Creek was 727 fish; the midpoint of the run was June 22. The dominant age classes of the 2016 Chinook salmon run were 1.3 (61.9%, SE 6.3%) and 1.2 (22.6%, SE 5.0%). In 2017, the total Chinook salmon escapement to Alexander Creek was 354 fish; the midpoint of the run was June 26. The dominant age classes of the 2017 Chinook salmon run were 1.2 (53.3%, SE 7.5%) and 1.3 (33.5%, SE 6.3%).
Book Synopsis Alexander Creek Chinook and Coho Salmon Stock Assessment, 2014 and 2015 by : Adam St. Saviour
Download or read book Alexander Creek Chinook and Coho Salmon Stock Assessment, 2014 and 2015 written by Adam St. Saviour and published by . This book was released on 2017 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon (Oncorhynchus tshawytscha) and coho salmon (O. kisutch) were enumerated in 2014 and 2015 using a resistance board weir at river kilometer 21 of Alexander Creek in the Northern Cook Inlet Management Area. Only the coho salmon run was fully censused in 2014; both the Chinook and coho salmon runs were fully censused in 2015. In 2014, the total coho salmon escapement to Alexander Creek was 191 fish; the midpoint of the run was August 17. The dominant age class of the 2014 coho salmon run was 2.1 (93.9%, SE 1.7%). In 2015, the total coho salmon escapement to Alexander Creek was 266 fish; the midpoint of the run was August 17. Coho salmon were not aged in 2015. In 2015, the total Chinook salmon escapement to Alexander Creek was 2,152 fish; the midpoint of the run was June 27. The dominant age classes of the 2015 Chinook salmon run were 1.2 (44.2%, SE 6.9%) and 1.3 (46.2%, SE 6.9%). In 2015, a Chinook salmon aerial count not associated with this project was the greatest since 2005. This and the weir count support the idea that age-1.3 Chinook salmon and younger that returned in 2015 benefitted from rearing in Alexander Creek when a northern pike suppression project was fully implemented.
Book Synopsis Ninilchik River Chinook Salmon Stock Assessment and Supplementation, 2016-2018 by : Holly I. Dickson
Download or read book Ninilchik River Chinook Salmon Stock Assessment and Supplementation, 2016-2018 written by Holly I. Dickson and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: During 2016–2018, an instream video weir enumerated the entire run of Ninilchik River Chinook salmon with average wild and hatchery escapements of 1,121 and 895, respectively. Enumerating the entire run allowed ADF&G to establish a sustainable escapement goal (SEG) based on total escapement versus an SEG based on an index period from 3 to 31 July. The current SEG of 750–1,300 Chinook salmon was met during all 3 years of the study (2016–2018). The current average wild escapement was below the average from when the run was last fully enumerated (1999–2015), but above the average from when the run was expanded based on weir counts (2006–2015). In contrast, the current average hatchery escapement was above the average from 1999–2015. Age-sex-length compositions were assessed during broodstock collection in 2016–2018. Wild Chinook salmon were predominantly ocean age 2 or 3, whereas hatchery-reared were predominantly ocean age 1 or 2. On average, wild Chinook salmon were larger than their hatchery-reared components of the same sex and age class. The sex composition of the wild Chinook salmon run ranged from 18% to 61% female, whereas the hatchery-reared sex composition ranged from 27% to 42% female. Approximately 150,000 age-0 smolt were stocked annually upstream of the weir (RKM 25.8) during 2016–2018, continuing the supplementation of the Ninilchik River with hatchery-reared Chinook salmon. The stocking occurred during the third week in May in 2016 and 2018. In 2017, smolt were stocked in early May at RKM 7.7. The broodstock collection goal to restock the Ninilchik River was met in all years. In 2017, instead of using Ninilchik River broodstock to stock Kachemak Bay terminal fisheries, broodstocks from other Cook Inlet locations were used. In 2018, extra Ninilchik River broodstock was collected to make up for regional broodstock shortfalls. Stocking in Halibut Cove Lagoon was discontinued after 2017 in favor of increased stocking at Nick Dudiak Fishing Lagoon where adaptive stocking methods were used in all years to avoid mortality associated with Chaetoceros spp. diatoms.
Book Synopsis Report to the Alaska Board of Fisheries, Alexander Creek King Salmon Stock Status and Action Plan, 2011 by : Alaska. Department of Fish and Game
Download or read book Report to the Alaska Board of Fisheries, Alexander Creek King Salmon Stock Status and Action Plan, 2011 written by Alaska. Department of Fish and Game and published by . This book was released on 2011 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: This action plan provides Alaska Department of Fish and Game's assessment of Alexander Creek king salmon as a stock of management concern, summarizes historical assessments of annual run sizes, and describes the existing regulations and emergency order authority that the department follows to manage Alexander Creek king salmon. Options are then presented for potential management actions for the commercial, sport, and subsistence fisheries, and research projects for this king salmon stock.
Book Synopsis Relation of Scale Characteristics to River of Origin in Four Stocks of Chinook Salmon (oncorhynchus Tshawytscha) in Alaska by : Richard G. Rowland
Download or read book Relation of Scale Characteristics to River of Origin in Four Stocks of Chinook Salmon (oncorhynchus Tshawytscha) in Alaska written by Richard G. Rowland and published by . This book was released on 1969 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mixed Stock Analysis of Chinook Salmon Harvested in Southeast Alaska Commercial Troll and Sport Fisheries, 2017 by : Kyle Shedd
Download or read book Mixed Stock Analysis of Chinook Salmon Harvested in Southeast Alaska Commercial Troll and Sport Fisheries, 2017 written by Kyle Shedd and published by . This book was released on 2021 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon originating from Alaska, British Columbia, and the Pacific Northwest are harvested in the Southeast Alaska (SEAK) commercial troll and sport fisheries. Owing to its mixed stock nature, the overall SEAK Chinook salmon fishery is managed as 1 of 3 aggregate abundance-based management fisheries under provisions of the Pacific Salmon Treaty (PST) Agreement. Genetic methods have been implemented in SEAK since 2004 and allow direct estimation of the major stock groups contributing to these fisheries. This project estimated the relative stock composition of SEAK troll and sport fishery harvests from fishery accounting year (AY) 2017 (October 1, 2016-September 30, 2017). The major contributors to the SEAK fisheries ordered from north to south were the Southeast Alaska/Transboundary River, North/Central British Columbia, West Vancouver, South Thompson, Washington Coast, Interior Columbia River Summer/Fall (Su/F), and Oregon Coast reporting groups. Collectively, these 7 stock aggregates, referred to as driver stocks, accounted for 89% of the troll harvest and 95% of the sport harvest. The Interior Columbia River Su/F driver stock was the largest contributor to the troll fishery (24% of the harvest), and Southeast Alaska/Transboundary River was the largest contributor to the sport fishery (28% of the harvest). Results indicate considerable temporal and spatial variation in the composition of troll and sport harvests in AY 2017 and across years. Stock composition data from this and other stock assessments are used to provide fisheries information including stock-specific run reconstructions, forecasting of run sizes to transboundary rivers, determining the origin of catches in the SEAK troll fishery by age to assist in evaluation of the Pacific Salmon Commission Chinook Model, estimating harvest of SEAK and transboundary river wild and hatchery salmon separately, and estimating some terminal run sizes of stocks in the PST area that drive the SEAK fishery. three-event mark-recapture experiment was conducted on northern pike Esox lucius in Minto Flats, Alaska from March through August 2018. Abundance was estimated for 2 specific populations: 1) an overwintering population residing in the Chatanika River upriver from its confluence with Goldstream Creek, called the Chatanika River Overwintering Area (CROA); and 2) a summer population occupying a wetland complex defined as the Minto Lakes Study Area (MLSA). Fish were sampled and marked in the CROA from 7-23 March 2018 and 12-21 June 2018 in the MLSA. Recapture events occurred in the MLSA from 12-21 June 2018 (concurrent with marking) and 7-16 August 2018. One-hundred radio tags were deployed during March 2018 to evaluate movements of northern pike relative to the mark-recapture experiment. Two models were used to estimate abundances: a traditional two-event Petersen mark-recapture model for closed populations, and a multinomial Bayesian model. The Petersen model abundance estimate of fish ≥600 mm fork length (FL) in the CROA was 14,817 (SE = 1,836) and for the MLSA was 11,956 (SE = 5,836). The Bayesian multinomial model abundance estimate for fish ≥600 mm FL in the CROA was 14,675 (SE = 1,631) and for the MLSA was 11,443 (SE = 1,651). The Bayesian multinomial model generated more precise estimates because it used data from all sampling events and incorporated information from the radiotagged fish. There were significantly more northern pike in the MLSA than what was found in 2008. Biases in the estimates were addressed and the 2 modeling approaches were evaluated. The current exploitation rate of northern pike in Minto Flats is 7.3%, which is well below the maximum threshold stipulated by the joint sport and subsistence fishery management plans.
Book Synopsis Unuk and Chickamin Chinook Salmon Stock Status and Action Plan, 2022 by : Bo Meredith
Download or read book Unuk and Chickamin Chinook Salmon Stock Status and Action Plan, 2022 written by Bo Meredith and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to guidelines established in the Policy for the Management of Sustainable Salmon Fisheries (SSFP), the Alaska Department of Fish and Game (department) recommended that the Unuk River stock of Chinook salmon (Oncorhynchus tshawytscha) be designated as a “stock of management concern” in October 2017. This recommendation was adopted by the Alaska Board of Fisheries (board) in January 2018. Then, in October 2020, the department recommended continuing this designation and additionally recommended that the Chickamin River stock of Chinook salmon be added as a “stock of management concern”. A “management concern” is defined as “a concern arising from a chronic inability, despite use of specific management measures, to maintain escapements for a salmon stock within the bounds of the SEG [sustainable escapement goal], BEG [biological escapement goal], OEG [optimum escapement goal], or other specified management objectives for the fishery.” The escapement of the Unuk River stock of Chinook salmon has been below the lower bound of the existing BEG (1,800–3,800 fish) in 3 of the past 5 years (2016–2020). The escapement of Chickamin River Chinook salmon has been below the lower bound of the existing BEG (2,150–4,300 fish) in 4 of the past 5 years (2016–2020). Since 2014, the department has implemented conservative management actions to reduce harvest of Unuk River Chinook salmon, and by extension and proximity to the Unuk River, it is assumed those actions have reduced harvests of Chickamin River Chinook salmon as well.
Book Synopsis Anchor River Chinook Salmon Stock Assessment, 2013 by : Carol M. Kerkvliet
Download or read book Anchor River Chinook Salmon Stock Assessment, 2013 written by Carol M. Kerkvliet and published by . This book was released on 2013 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Review of Stock Assessment Data and Procedures for U.S. Chinook Salmon Stocks by : Pacific Salmon Commission. U.S. Chinook Technical Committee
Download or read book A Review of Stock Assessment Data and Procedures for U.S. Chinook Salmon Stocks written by Pacific Salmon Commission. U.S. Chinook Technical Committee and published by . This book was released on 1997 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stikine River and Andrew Creek Chinook Salmon Stock Status and Action Plan, 2022 by : Paul G. Salomone
Download or read book Stikine River and Andrew Creek Chinook Salmon Stock Status and Action Plan, 2022 written by Paul G. Salomone and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to guidelines established in the Policy for the Management of Sustainable Salmon Fisheries (SSFP), the Alaska Department of Fish and Game (department) recommended that the Stikine River and Andrew Creek stocks of Chinook salmon (Oncorhynchus tshawytscha) be designated as stocks of “management concern.” A management concern is defined as “a concern arising from a chronic inability, despite use of specific management measures, to maintain escapements for a salmon stock within the bounds of the SEG [sustainable escapement goal], BEG [biological escapement goal], OEG [optimum escapement goal], or other specified management objectives for the fishery.” Escapements of Stikine River Chinook salmon have fallen below the lower bound of the existing BEG (14,000 to 28,000 fish) each of the last 5 years (2016 to 2020). Since 2016, the department has implemented conservative management measures that have been effective in reducing the harvest of Stikine River Chinook salmon. Andrew Creek is a tributary to the Stikine River located entirely within Alaska. Chinook salmon escapements to Andrew Creek have been below the BEG (650 to 1,500 fish) in 4 of the previous 5 years. It is assumed actions that have reduced the harvest of Stikine River Chinook salmon have also reduced harvest of Andrew Creek Chinook salmon.
Book Synopsis Stock Assessment of Elk River Fall Chinook Salmon for Exploitation Rate Analysis by : Ronald H. Williams
Download or read book Stock Assessment of Elk River Fall Chinook Salmon for Exploitation Rate Analysis written by Ronald H. Williams and published by . This book was released on 2004 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Operational Plan by : Holly I. Dickson
Download or read book Operational Plan written by Holly I. Dickson and published by . This book was released on 2020 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2020-2024, Chinook salmon (Oncorhynchus tshawytscha) will be enumerated at 2 Anchor River sites from mid-May through early August to monitor escapement for the drainage. The south fork site, located at approximately river kilometer (RKM) 4.0, will be monitored by an Adaptive Resolution Imaging Sonar (ARIS) during high flow periods, and a resistance board weir fitted with underwater video will be used thereafter. The north fork site, located at about RKM 5.3, will be monitored by a resistance board weir with underwater video from the beginning of the Chinook salmon run in early May. Motion-detection technology will be used at each weir to record fish passage 24 hours per day. Weekly beach seine surveys will be used to capture Chinook salmon for age-sex-length (ASL) samples downstream of the confluence of the south and north forks. Chinook salmon data will be used to update estimates of the spawner-recruit relationship and harvest rate, and to provide inseason run information to managers. Coho salmon and steelhead will also be monitored in the fall of each year using the resistance board weir and video system on each fork. Coho salmon age, sex, and length will be collected via beach seining. Coho salmon escapement and harvest rate will be estimated along with an index of steelhead abundance and catch rate.
Book Synopsis Amendment: Ninilchik River Chinook Salmon Stock Assessment and Broodstock Collection, 2023 by : Holly I. Dickson
Download or read book Amendment: Ninilchik River Chinook Salmon Stock Assessment and Broodstock Collection, 2023 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: This report amends ROP.SF.2A.2020.04 by extending its primary objectives for an additional year. This project has 2 main goals: 1) assess the status of the Ninilchik River Chinook salmon (Oncorhynchus tshawytscha) stock, and 2) collect Chinook salmon broodstock for supplementation of the Ninilchik River and stocking of terminal saltwater fishery locations in Kachemak Bay. After the escapement goal is reviewed in 2023, Chinook salmon escapement monitoring will transition from the broodstock collection weir at RKM 7.7 to the weir at RKM 4.1. The downstream monitoring location provides full enumeration of wild and hatchery-reared escapements. After paired counts at both weir locations are made, the current SEG, associated with the upper weir, will be updated with reference to the lower weir. The resulting lower-weir goal will better reflect the whole escapement in the Ninilchik River. The complete enumeration of the hatchery-reared run and age sampling will also provide estimates of survival rates of hatchery broods and will provide harvest rates in years when the fishery prohibits retention of wild Chinook salmon. These estimates will help clarify the contribution that hatchery-reared Chinook salmon make to the Ninilchik River sport fishery.
Book Synopsis Stock Assessment of Chinook, Sockeye, and Chum Salmon in the Nushagak River by : Gregory B. Buck
Download or read book Stock Assessment of Chinook, Sockeye, and Chum Salmon in the Nushagak River written by Gregory B. Buck and published by . This book was released on 2012 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Alsek River Chinook Salmon Stock Assessment, 1988 by : Robert D. Mecum
Download or read book Alsek River Chinook Salmon Stock Assessment, 1988 written by Robert D. Mecum and published by . This book was released on 1989 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chinook Salmon Stock Assessment and Research Plan, 2013 by : Alaska. Division of Sport Fish
Download or read book Chinook Salmon Stock Assessment and Research Plan, 2013 written by Alaska. Division of Sport Fish and published by . This book was released on 2013 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent Alaska-wide downturns in productivity and abundance of Chinook salmon stocks have created social and economic hardships across many communities in rural and urban Alaska. There is a fundamental need to more precisely characterize productivity and abundance trends of Chinook salmon stocks across Alaska, gather essential information necessary to understand root causes of these widespread declines, and track population trends into the future. This document outlines a foundation of stock assessment and research programs among a suite of indicator stocks across Alaska designed as a long-term commitment to address fundamental knowledge gaps, elucidate causal mechanisms behind observed trends, and improve management capabilities. A team of nine Alaska Department of Fish and Game biologists and scientists worked collaboratively with federal agencies and academic partners to develop this plan to guide efforts towards better understanding productivity and abundance trends of Chinook salmon. In this plan we describe the general life history of Chinook salmon in Alaska; document stock-specific declines in productivity, abundance, and harvest that have occurred; and, described gaps in knowledge that limit management options when responding to downturns in productivity. The core of this proposed plan is a stock-specific, life history-based approach to research focused on twelve indicator stocks from around Alaska, representing diverse life history and migratory characteristics across a broad geographic range. Stock assessment programs on indicator stocks target specific objectives so that gaps in our knowledge of Chinook salmon can be addressed in a practical, cost-effective, and structured approach. The twelve indicator stocks, from Southeast Alaska to the Arctic-Yukon-Kuskokwim are: Unuk, Stikine, Taku, Chilkat, Copper, Susitna, Kenai, Karluk, Chignik, Nushagak, Kuskokwim, and Yukon rivers. Recommended stock assessments include enumeration of adult escapement and stock-specific harvests in all relevant fisheries, as well as estimates of juvenile Chinook salmon abundance during the smolt stage (Table 1 and Table 2). As a companion to these stock-specific and fishery-based projects, we also recommend a suite of local and traditional knowledge studies (Table 2), nearshore marine surveys, and life history process studies (Table 3). Approximate annual costs by type of activity are shown in Table 4. This plan represents a long-term effort where implementation of stock assessment programs on indicator stocks addresses critical knowledge gaps that limit management capabilities. Implementation to the fullest extent possible provides most opportunity for improved information to assist managers, particularly during times of low abundance.
Book Synopsis Stock Assessment of Early-run Chinook Salmon in the Kenai River, 2002-2006 by : Timothy R. McKinley
Download or read book Stock Assessment of Early-run Chinook Salmon in the Kenai River, 2002-2006 written by Timothy R. McKinley and published by . This book was released on 2010 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
