Estimation of Abundance and Distribution of Chinook Salmon in the Yukon River Using Mark-recapture and Radio Telemetry in 2000 and 2001 PDF Download
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Author: Ted R. Spencer Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 54
Book Description
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.
Author: Ted R. Spencer Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 54
Book Description
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.
Author: Ted R. Spencer Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 50
Book Description
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.
Author: Publisher: ISBN: Category : Languages : en Pages : 98
Book Description
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.
Author: Nicholas A. Decovich Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 0
Book Description
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.
Author: Lisa Ann Stuby Publisher: ISBN: Category : Animal radio tracking Languages : en Pages : 53
Book Description
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.
Author: Jordan Head Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 34
Book Description
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).
Author: Sean Larson Publisher: ISBN: Category : Chum salmon Languages : en Pages : 16
Book Description
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.
Author: Richard J. Yanusz Publisher: ISBN: Category : Chinook salmon Languages : en Pages : 31
Book Description
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.
Author: Ted R. Spencer
Author: Ted R. Spencer
Author: Ted R. Spencer
Author: Ted R. Spencer
Author: 
Author: Johnson, Y
Author: Nicholas A. Decovich
Author: Lisa Ann Stuby
Author: Jordan Head
Author: Sean Larson
Author: Richard J. Yanusz