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.
Download or read book Mark recapture Abundance Estimates for Yukon River Chinook Salmon in 2000 2004 written by Ted R. Spencer and published by . This book was released on 2009 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the mark-recapture abundance estimates that were developed for Yukon River Chinook salmon as part of a basin-wide telemetry study conducted in 2000-2004.
Download or read book Mark recapture Abundance Estimates for Yukon River Chinook Salmon in 2003 written by Ted R. Spencer and published by . This book was released on 2006 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abundance of adult Chinook salmon Oncorhynchus tshawytscha passing by the village of Russian Mission was estimated in 2003 as part of a radio telemetry study on the Yukon River. Drift gillnets were used to capture 2,312 salmon at Russian Mission, 1,097 of which were marked with plastic spaghetti tags and esophageal radio transmitters. Marked fish were tracked upstream to spawning grounds. Chapman's modification of Petersen's closed-population, two-event mark-recapture experiment was used to estimate abundance. The second sampling event consisted of salmon spawning in select locations or caught in select fisheries representing populations that returned early (bound for Canada), late (bound for the Koyukuk River), and mid-run (bound for the Tanana River). Of the 36,032 large salmon (= 650 mm METF) involved in the second event, 146 carried transmitters for an estimated abundance of 261,545 chinook salmon. Diagnostic testing showed this estimate to be consistent. Bootstrap simulation was used to estimate the variance (SE=18,911).
Download or read book Mark recapture Abundance Estimates for Yukon River Chinook Salmon in 2004 written by Ted R. Spencer and published by . This book was released on 2007 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the abundance of adult chinook salmon, Oncorhynchus tshawytscha, passing by the village of Russian Mission, which was estimated in 2004 as part of a radiotelemetry study on the Yukon River.
Download or read book Mark recapture Abundance Estimates for Yukon River Chinook Salmon in 2002 written by Ted R. Spencer and published by . This book was released on 2005 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of the Abundance of Chinook Salmon Oncorhynchus Tshawytscha in the Upper Yukon River Basin Using Mark recapture Methods 1990 95 written by and published by . This book was released on 2002 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fisheries & Oceans Canada has conducted mark-recapture studies on adult Yukon River chinook salmon since 1982. In some of these studies, up to 2,174 upstream migrants were spaghetti tagged annually at two fishwheels located just upstream from the Canada/US border. Recaptures were made in a commercial fishery upstream. This report presents results from the chinook mark-recapture program for 1990 to 1995. Background on the Yukon River, its chinook population & fishery, and mark-recapture & data analysis methods begins the report. Results are presented with regard to the biological characteristics of salmon captured, abundance estimates using three estimation methods, fishery catches & spawning escapement, harvest rates, and migration rates. The final section discusses problems with respect to the abundance estimators used and makes recommendations for further research.
Download or read book Estimation of the Abundance of Chinook Salmon Oncorhynchus Tshawytscha in the Upper Yukon River Basin Using Mark recapture Methods 1990 1995 written by Johnson, Y and published by Whitehorse, Yukon : Fisheries and Oceans Canada. This book was released on 2002 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Inriver Abundance of Chinook Salmon in the Kuskokwim River 2003 written by Lisa Ann Stuby and published by . This book was released on 2004 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: A two-sample mark-recapture experiment was conducted for chinook salmon in the Kuskokwim River and its tributaries using radiotelemetry from June to August, 2003. The objectives were to estimate abundance in the river upstream of Kalskag and to estimate age, sex, and length of those fish.
Download or read book Inriver Abundance Kuskokwim River Chinook Salmon 2014 written by Jordan Head and published by . This book was released on 2017 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: We conducted a 2-sample mark-recapture experiment using radiotelemetry methods to estimate the abundance of adult Chinook salmon in the middle and upper Kuskokwim River in 2014. Fish were captured using drift gillnets and fish wheels in the mainstem Kuskokwim River at river kilometer (rkm) 270 near the community of Kalskag. Chinook salmon were marked with radio and T-bar anchor tags. Tagged fish were tracked throughout the study area using stationary and aerial telemetry methods. Four weirs located upriver from the tag site were used to recapture tagged Chinook salmon. The abundance of Chinook salmon upriver of rkm 294 was 61,255 (95% CI: 49,021-80,985).
Download or read book Abundance Distribution and Migration Patterns of Summer Chum Salmon in the Yukon River Drainage 2014 2015 written by Sean Larson and published by . This book was released on 2017 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summer chum salmon (Oncorhynchus keta) in the Yukon River support robust commercial and subsistence fisheries; however, fishery managers have had incomplete information about their run timing, spawning distribution, stock composition, and abundance. To address this, a radiotelemetry study was implemented on summer chum salmon in 2014 and 2015. A total of 1,232 (2014) and 1,199 (2015) summer chum salmon were fitted with radio transmitters. Radiotagged summer chum salmon were mapped, travel rates were estimated, and proportions of tagged fish recovered within different tributaries were determined. Basic mark-recapture assumptions were tested and abundance above the tagging site was estimated. Summer chum salmon were found to be widely distributed within the Yukon River drainage. Although a few tagged fish were observed in most locations, roughly 50% of tagged fish were observed in the Anvik, Koyukuk, and Bonasila rivers each year. Summer chum salmon destined for upper river spawning areas traveled faster than those to lower river areas. Summer chum salmon tended to recover quickly after being tagged, and traveled relatively fast within the mainstem Yukon River, but slowed down after entering their spawning tributaries. The 2014 mark-recapture abundance estimate was about 2,100,000 fish, which corresponded with summer chum salmon passage at the mainstem Yukon River sonar near Pilot Station. The 2015 mark-recapture abundance estimate was also about 2,100,000 fish, which was larger than the summer chum salmon passage at the sonar near Pilot Station. Results from this study help to evaluate sonar passage estimates and provide fishery managers with more detailed information about distribution and migratory patterns of individual summer chum salmon stocks within the Yukon River drainagewide population.
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.
Download or read book Operational Plan written by Johnathon K. Campbell and published by . This book was released on 2021 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this study is to estimate the abundance of Chinook salmon at river mile (RM) 34 of the mainstem Susitna River and spawning distribution among 5 management areas in 2019. A 2-event, mark–recapture experiment in combination with radio telemetry will be used. Fish wheels and gillnets will be operated at river mile (RM) 34 to capture Chinook salmon for marking with dart-PIT tags (a dart tag with an imbedded passive integrated transponder [PIT]) and radiotelemetry tags. Recapture event sampling will occur at the Deshka River weir at RM 7 where a PIT detection array will be used. Eight radiotracking stations will be strategically placed throughout the drainage to determine when radiotagged fish move in and out of the 5 management zones. A concurrent genetics mark–recapture study will be performed using genetic samples taken from a systematic sample of all dart-PIT tagged fish. The applied radio tags will also be used to estimate handling effects. In the event of a sport fishery, the proportions of non-Deshka River Chinook salmon in the sport harvest taken in 2 sections of the Deshka River will also be estimated through harvest sampling of axillary processes and genetic stock identification.
Download or read book Inriver Abundance of Chinook Salmon in the Kuskokwim River 2005 written by Lisa Ann Stuby and published by . This book was released on 2006 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A two-sample mark-recapture experiment was conducted to estimate inriver abundance of Chinook salmon Oncorhynchus tshawytscha in the middle and upper Kuskokwim River and associated tributaries using radiotelemetry techniques from June to August in 2005.
Download or read book Exploratory Analysis written by Gene J. Sandone and published by . This book was released on 2010 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: After decades of using the DFO mark-recapture border program as the sole U.S./Canada border passage estimator oil the Yukon River, the cooperative ADF&G-NOAA drainage-wide radio telemetry project and ADF&G-DFO sonar projects provided independent estimates of border passage for 2002-2004 and 2005- 2007, respectively. Marked and variable differences between the annual DFO mark-recapture estimates and estimates derived from radio telemetry and sonar projects strongly suggests that the DFO mark- recapture estimate was biased low and a new sonar-based escapement goal was necessary. An exploratory analysis was initiated to reconstruct the historic drainage escapement database and make it compatible with new sonar-based escapement estimates. Analyses were conducted that ranged from simple scaling of historical data to more robust regression models. Seventeen escapement databases were created through these analyses. Ultimately, four escapement databases, reconstructed from drainage escapements derived from radio telemetry and sonar projects (2002-2007) and regressed against escapement indices, were considered viable candidates. A secondary goal of these analyses was to investigate potential escapement goal ranges based oil the viable escapement databases. Interestingly, all Sustainable Escapement Goal (SEG) ranges and Marcov Table analysis indicated similar escapement goals for all four reconstructed escapement database scenarios. Spawner-recruit statistics were also very similar. Therefore, two escapement goal recommendations were suggested: 1) Set a conservative escapement goal range that reflected all escapement database scenarios, 40,000 to 60,000 Chinook salmon, and 2) Do not select a reconstructed escapement database for the period 1982-2001, but build on the current escapement database derived from radio-telemetry estimates (2002-2004) and sonar counts (2005-present).
Download or read book Estimating Adult Chinook Salmon Abundance on the Chilkat and Unuk Rivers Using Transgenerational Genetic Mark recapture written by Randy L. Peterson and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transgenerational genetic mark–recapture (tGMR) methods will be used to estimate the spawning abundance of Chinook salmon Oncorhynchus tshawytscha at the Chilkat and Unuk Rivers in 2020 and 2021, respectively. Tissue samples from adults returning to the Chilkat River were collected in the summer of 2020 and from parr rearing in the Chilkat River in the fall of 2021. Lab work and data analysis will be completed in the winter of 2021–2022. Similarly, tissue samples from adults returning to the Unuk River were collected in the summer of 2021, and samples will be collected from parr in the fall of 2022. Lab work and data analysis will be completed in the winter of 2022–2023. These studies will be used to determine the feasibility of using tGMR to estimate escapement in Southeast Alaska by comparing tGMR abundance estimates to abundance estimates generated through existing field programs. This operational plan covers the lab and project reporting aspects of these projects. Primary data collection activities are described in the project-specific operational plans.
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:
