Author: Kevin L. Schaberg
Publisher:
ISBN:
Category : Animal radio tracking
Languages : en
Pages : 34
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Book Description
Discusses the results of an Alaska Department of Fish and Game, Division of Commercial Fisheries mark-recapture study of coho (2001-2005), chum (2002-2005), sockeye (2002-2006), and Chinook (2005 and 2006) salmon returning to the Kuskokwim River, Alaska.
Author: Zachary W. Liller
Publisher:
ISBN:
Category : Animal radio tracking
Languages : en
Pages : 34
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Book Description
Estimates of total annual return of coho salmon to the Kuskokwim River drainage were attempted for years 2011-2005, 2008, and 2009 by adding mark-recapture abundance estimates upriver of Kalskag (Birch Tree Crossing) to estimates of escapement and harvest below Kalskag.
Author: Brian Bue
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 47
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Book Description
Total run of Chinook salmon (Oncorhynchus tshawytscha) to the Kuskokwim River from 1976 through 2011 was estimated using a model developed for data-limited situations. The model simultaneously combined information on subsistence harvest, commercial harvest and effort, sport harvest, test fish harvest and catch per unit of effort at Bethel, mark-recapture estimates of inriver abundance, and counts of salmon at 6 weirs and peak aerial counts from 14 drainages all spread throughout the Kuskokwim River drainage. The estimates of historic run size were then combined with available information on the age structure of the stock to reconstruct the total return by age and ultimately estimate a brood table.
Author: Edward Vincent Farley (Jr.)
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 388
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Book Description
"The purpose of the symposium was to summarize BASIS research conducted during 2002 to 2006 and increase our understanding about how climate change will affect salmon growth and survival in the North Pacific Ocean. The symposium topics were: 1. Overviews of climate change, Bering Sea ecosystems, and salmon production. 2. Biological responses by salmon to climate and ecosystem dynamics, 2.1. Migration and distribution of salmon, 2.2. Food production and salmon growth, 2.3. Feeding habits and trophic interactions, 2.4. Production trends and carrying capacity of salmon"--Pref.
Author: Zachary W. Liller
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 40
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Book Description
Because it is not possible to count all chinook salmon that return to the Kuskokwim River, estimates of annual abundance and escapement are made using a maximum likelihood model. The model was used to estimate the 2015 drainage-wide runs size. This report discusses the model inputs, model results, uncertainty of the estimates, and conclusions of the reconstruction model.
Author: Sean D. Larson
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 46
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Book Description
A maximum likelihood model was used to estimate the 2019 drainagewide run size and escapement of Kuskokwim River Chinook salmon (Oncorhynchus tshawytscha). Total run and escapement were estimated to be 226,987 (95% CI: 182,811–281,839) and 188,483 (95% CI: 144,307–243,335) fish, respectively. Model estimates were informed by direct observations of the 2019 escapement at 16 locations (4 weirs and 12 aerial surveys) and harvest, combined with historical observations of escapement (up to 6 weirs and 14 aerial surveys), harvest, test fishery, and mark–recapture data dating back to 1976. Model results are adequate to draw broad conclusions about the 2019 run and escapement. The 2019 total run of Chinook salmon was the largest since 2007 and was probably above the 1976–2018 average of 215,529 fish. The drainagewide sustainable escapement goal of 65,000–120,000 was exceeded in 2019. The 2020 Kuskokwim River Chinook salmon forecast is for a range of 193,000–261,000 fish.
Author: Sandra K. Sonnichsen
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 90
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Book Description
Age composition and run strength data for early and late run Kenai River chinook salmon (Oncorhynchus tshawytscha) from 1976 through 1990 and compiled to be available for future estimation of return per spawner ratios for this fishery on the east shore of Cook Inlet in southern Alaska.
Author: Sean D. Larson
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 46
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Book Description
A maximum likelihood model was used to estimate the 2021 drainagewide run size and escapement of Kuskokwim River Chinook salmon (Oncorhynchus tshawytscha). The total run was estimated to be 129,751 (95% CI: 94,489–178,171) fish and escapement was estimated to be 101,000 (95% CI: 65,738–149,420) fish. Model estimates were informed by direct observations of the 2021 escapement at 3 weirs and 2021 harvest, combined with historical observations of escapement (up to 6 weirs and 14 aerial surveys), harvest, test fishery, and mark–recapture data dating back to 1976. Model results are adequate to draw broad conclusions about the 2021 run and escapement. The 2021 total run of Chinook salmon was below the 1976–2020 average of 214,475 fish. The drainagewide sustainable escapement goal of 65,000–120,000 was met in 2021. The 2022 Kuskokwim River Chinook salmon forecast is for a range of 99,000–161,000 fish.
Author:
Publisher:
ISBN:
Category : Environmental impact statements
Languages : en
Pages : 466
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Book Description
The Draft EIS provides decision-makers and the public with an evaluation of the environmental, social, and economic effects of alternative harvest strategies for the federally managed groundfish fisheries in the Gulf of Alaska (GOA) and the Bering Sea and Aleutian Islands (BSAI). The EIS examines alternative harvest strategies that comply with Federal regulations, the Fishery Management Plans for the GOA and BSAI groundfish fisheries, and the Magnuson-Stevens Act. The harvest strategies are applied to the best available scientific information to derive the total allowable catch for the groundfish fisheries.
Author: Sean D. Larson
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 0
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Book Description
A maximum likelihood model was used to estimate the 2022 drainagewide run size and escapement of Kuskokwim River Chinook salmon (Oncorhynchus tshawytscha). The total run was estimated to be 142,495 (95% CI: 107,579–188,743) fish, and escapement was estimated to be 107,980 (95% CI: 73,064–154,228) fish. Model estimates were informed by direct observations of the 2022 escapement at 3 weirs and 2022 harvest, combined with historical observations of escapement (up to 6 weirs and 14 aerial surveys), harvest, test fishery, and mark–recapture data dating back to 1976. Model results are adequate to draw broad conclusions about the 2022 run and escapement. The 2022 total run of Chinook salmon was below the 1976–2021 average of 211,081 fish. The drainagewide sustainable escapement goal of 65,000–120,000 was met in 2022. The 2022 Kuskokwim River Chinook salmon forecast is for a range of 115,000–170,000 fish.
