Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 842
Book Description
Nushagak River Chinook Salmon
Author: Gabriela HalasPublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 386
Book Description
Five Bristol Bay area communities located on or near the Nushagak River were selected to participate in research about salmon use and harvest, and participation in the subsistence fishery and harvest monitoring program. Post-season salmon harvest surveys were administered to households in Clarks Point, Ekwok, New Stuyahok, and Koliganek in 2013 and 2014, and in Dillingham in 2014 and 2016. The surveys were used to develop household use and harvest estimates for salmon; identify fishing and harvest locations and gear types used to harvest salmon; and gather assessments of changes to harvests and sufficiency of salmon supply. Households were also asked about their participation in the subsistence salmon permit program. Key respondent interviews and participant observation were also used throughout the study period to more fully explore the social and economic relationship that the communities have to salmon: there was a specific emphasis to collect local traditional knowledge about Nushagak River Chinook salmon stock abundance, health, habitat, and fisheries management, as well as individual experiences and histories regarding subsistence practices in Bristol Bay. This research was recommended in 2013 by the Alaska Department of Fish and Game (ADF&G) Chinook Salmon Research Team. Either sockeye or Chinook salmon was the most harvested species, in pounds usable weight, for all the study communities in every study year. Most households traveled some distance away from their community to obtain the salmon they needed for home use. Subsistence gillnet was the most common gear type used to harvest salmon, but coho salmon accounted for more of the rod and reel gear harvest than any other species at every community that used rod and reel gear. For both study years, the range of per capita harvests for all salmon spanned from 91 lb to 701 lb per person, and for Chinook salmon spanned from 42 lb to 218 lb per person. Post-season household surveys identified salmon harvests that were not reported to the harvest monitoring program, which yielded recommendations for improved community participation in subsistence fishing reporting. Key respondent interviews collected statements from community residents about their concerns for the health of salmon stocks in Bristol Bay and valuable descriptions of changed salmon habitat and abundance.
Nushagak River Chinook Salmon Escapement Sampling Results, 1984
Author: R. Eric MinardPublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 34
Book Description
Historical Estimates of Run and Escapement for Chinook Salmon Returning to the Nushagak River, 1968–2020
Author: Jordan HeadPublisher:
ISBN:
Category : Chinook salmon fisheries
Languages : en
Pages : 0
Book Description
A maximum likelihood model was developed to estimate the 1968–2020 drainagewide run size and escapement of Nushagak River Chinook salmon (Oncorhynchus tshawytscha). The model simultaneously combined information by direct observations of escapement at 8 locations (1 tower and 7 aerial surveys); harvest of fish from commercial, subsistence, and sport fisheries; inriver abundance indices from the Nushagak River sonar project; and inriver abundance estimates from acoustic tag and mark–recapture studies. Results showed that reconstructed total run size ranged from 74,000 to 629,000 Chinook salmon with an average run size of 282,000 fish, and escapement ranged from 49,000 to 476,000 fish with an average of 210,000 fish. The model estimated total run and escapement appeared to be reasonable and tracked well with previous estimates. The major deficiency of this model is the absence of overlapping, long-term escapement and run monitoring data.
Survey of the Chinook Salmon Sport Fishery in the Lower Nushagak River, Alaska, 2001
Author: Thomas A. CappielloPublisher:
ISBN:
Category : Chinook salmon fisheries
Languages : en
Pages : 44
Book Description
Results of a survey of the sport fishery for chinook salmon on the Nushagak River in Southwest Alaska, which was conducted from June 15 to July 15, 2001.
Operational Plan: Monitoring the Chinook Salmon Sport Fishery on the Nushagak River Drainage, 2023
Author: Lee K. BordenPublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 0
Book Description
This project surveys the Chinook salmon sport fishery on the Nushagak River. Information will be collected on angler-days of effort by type of angler (guided vs. unguided) and gear (bait or no bait), catch and harvest rates of Chinook salmon, as well as age, sex, length, weight, and genetics of Chinook salmon in the sport harvest. Data will be reported to fisheries managers in Dillingham daily, providing real-time information regarding sport fishing success as well as the composition of the harvest. Data collected from onsite surveys will be used to document use patterns and design regulations that will accommodate growth of the sport fishery and maintain angling opportunity. Results will also guide review of current regulations and will be used to assess the effectiveness of current regulations in maintaining compliance with the management plan.
Supplement to Expanding Nushagak River Chinook Salmon Escapement Indices to Inriver Abundance Estimates Using Acoustic Tags, 2011-2014
Author: Suzanne L. MaxwellPublisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 297
Book Description
This report is a supplement to the report: Expanding Nushagak River Chinook salmon escapement indices to inriver abundance estimates using acoustic tags, 2011–2014. Due to the length of the original report, the complete set of fish tracks from this study, current profiles, and 2 reports by Lotek, Inc. that document the evaluation of the acoustic tag system in riverine environments have been combined into this supplemental report.
Effort and Catch Statistics for the Chinook Salmon (Oncorhynchus Tshawytscha) Sport Fishery in the Lower Nashagak [i.e. Nushagak] River, 1986
![Effort and Catch Statistics for the Chinook Salmon (Oncorhynchus Tshawytscha) Sport Fishery in the Lower Nashagak [i.e. Nushagak] River, 1986 PDF](https://books.google.com/books/content/images/frontcover/hp77twAACAAJ?fife=w80-h100)
Author: R. Eric MinardPublisher:
ISBN:
Category : Chinook salmon fisheries
Languages : en
Pages : 21
Book Description
Effort and Catch Statistics for the Sport Fishery for Chinook Salmon in the Lower Nushagak River, 1987
Author: R. Eric MinardPublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 30
Book Description
Expanding Nushagak River Chinook Salmon Escapement Indices to Inriver Abundance Estimates Using Acoustic Tags, 2011–2014
Author: Suzanne L. MaxwellPublisher:
ISBN:
Category : Escapement (Fisheries)
Languages : en
Pages : 142
Book Description
An acoustic tag study was conducted at the Nushagak River from 2011 to 2014 to determine which portions of the river Chinook salmon Oncorhynchus tshawytscha migrate through as they pass the location of a project that uses sonar to estimate salmon passage. The tagging study was done in conjunction with the sonar project, a project that uses DIDSON (dual-frequency identification sonar) and drift gillnetting techniques to estimate sockeye O. nerka, Chinook, and chum O. keta salmon passage. Chinook salmon estimates from the sonar project are an important tool for fishery managers even though an unknown proportion migrate beyond the sonar’s limited sampling range, ~30% of the river’s width. Acoustic tags were inserted into Chinook salmon captured in drift gillnets 13 km downriver from the sonar site. An acoustic receiver array deployed at the sonar site detected 94.6% of the tagged fish, and 81.9% produced usable tracks. The percentage of tagged fish that passed through 1 or both sonar beams using length-stratified groupings was 65% in 2011, 54% in 2012, 64% in 2013, and 47% in 2014, averaging 57%. Although tagged fish were observed across the entire array, dominant travel lanes emerged that differed among study years. Expanding the sonar estimates of Chinook salmon using length-stratified proportions increased the estimates by 59,251–146,409 fish per year from sonar estimates that ranged from 70,482 to 174,085 fish per year. Our recommendations are to continue the acoustic tag study for 3 years to confirm the stability of the expansion factors and improve sonar estimates by adding a midriver sampling zone or expanding past and future estimates using expansion factors from this study.
Project Operational Plan: Characterization of the Distribution, Run Timing, and Abundance of Nushagak River Chinook and Sockeye Salmon Using Radiotelemetry
Author: Michael Raymond LinkPublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 51
Book Description
A brief overview of the chinook and salmon fisheries in the Nushagak River and their management begins this document. The remainder describes a research plan for a study that will take place in 2006 at the river using radio tag detection in order to identify major spawning tributaries, estimate the proportion of spawning salmon in those tributaries, describe stock-specific run-timing patterns, and estimate system-wide abundance of sockeye salmon returning to the Nushagak River. The software to be used is Telemetry Manager produced by LGL.