2021 Kuskokwim River Chinook Salmon Run Reconstruction And 2022 Forecast

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2021 Kuskokwim River Chinook Salmon Run Reconstruction and 2022 Forecast

Author : Sean D. Larson
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (132 download)

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Book Synopsis 2021 Kuskokwim River Chinook Salmon Run Reconstruction and 2022 Forecast by : Sean D. Larson

Download or read book 2021 Kuskokwim River Chinook Salmon Run Reconstruction and 2022 Forecast written by Sean D. Larson and published by . This book was released on 2022 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

2022 Kuskokwim River Chinook Salmon Run Reconstruction and 2023 Forecast

Author : Sean D. Larson
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (138 download)

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Book Synopsis 2022 Kuskokwim River Chinook Salmon Run Reconstruction and 2023 Forecast by : Sean D. Larson

Download or read book 2022 Kuskokwim River Chinook Salmon Run Reconstruction and 2023 Forecast written by Sean D. Larson and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

2020 Kuskokwim River Chinook Salmon Run Reconstruction and 2021 Forecast

Author : Sean D. Larson
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (124 download)

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Book Synopsis 2020 Kuskokwim River Chinook Salmon Run Reconstruction and 2021 Forecast by : Sean D. Larson

Download or read book 2020 Kuskokwim River Chinook Salmon Run Reconstruction and 2021 Forecast written by Sean D. Larson and published by . This book was released on 2021 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: A maximum likelihood model was used to estimate the 2020 drainagewide run size and escapement of Kuskokwim River Chinook salmon (Oncorhynchus tshawytscha). The total run was estimated to be 124,486 fish (95% CI: 102,661–150,952) and escapement was estimated to be 88,285 fish (95% CI: 66,460–114,751). Model estimates were informed by direct observations of the 2020 escapement at 15 locations (3 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 2020 run and escapement. The 2020 total run of Chinook salmon was below the 1976–2019 average of 215,870 fish. The drainagewide sustainable escapement goal of 65,000–120,000 was met in 2020. The 2021 Kuskokwim River Chinook salmon forecast is for a range of 94,000–155,000 fish.

2019 Kuskokwim River Chinook Salmon Run Reconstruction and 2020 Forecast

Author : Sean D. Larson
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (115 download)

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Book Synopsis 2019 Kuskokwim River Chinook Salmon Run Reconstruction and 2020 Forecast by : Sean D. Larson

Download or read book 2019 Kuskokwim River Chinook Salmon Run Reconstruction and 2020 Forecast written by Sean D. Larson and published by . This book was released on 2020 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Kuskokwim River Chum Salmon Run Reconstruction

Author : Brian Bue
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Kuskokwim River Chum Salmon Run Reconstruction by : Brian Bue

Download or read book Kuskokwim River Chum Salmon Run Reconstruction written by Brian Bue and published by . This book was released on 2008 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this project was to reconstruct the chum salmon Oncorhynchus keta run to the Kuskokwim River for the years 1976 to 2007 with sufficient accuracy and precision to allow for the estimation of productivity on a drainage-wide basis.

Forecast Methodology for Copper River Sockeye and Chinook Salmon

Author : Kenneth Roberson
Publisher :
ISBN 13 :
Total Pages : 142 pages
Book Rating : 4.:/5 (123 download)

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Book Synopsis Forecast Methodology for Copper River Sockeye and Chinook Salmon by : Kenneth Roberson

Download or read book Forecast Methodology for Copper River Sockeye and Chinook Salmon written by Kenneth Roberson and published by . This book was released on 1993 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes Copper River (Alaska) sockeye and chinook salmon forecasting techniques, including confidence interval determination. Also addressed are corresponding run timing prediction for commercial catch, and total salmon escapement timing for the Miles Lake sonar enumeration site.

Kuskokwim River Chinook Salmon Run Reconstruction, 2015

Author : Zachary W. Liller
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (15 download)

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Book Synopsis Kuskokwim River Chinook Salmon Run Reconstruction, 2015 by : Zachary W. Liller

Download or read book Kuskokwim River Chinook Salmon Run Reconstruction, 2015 written by Zachary W. Liller and published by . This book was released on 2016 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Susitna River Chinook Salmon Run Reconstruction and Escapement Goal Analysis

Author : Adam M. Reimer
Publisher :
ISBN 13 :
Total Pages : 109 pages
Book Rating : 4.:/5 (114 download)

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Book Synopsis Susitna River Chinook Salmon Run Reconstruction and Escapement Goal Analysis by : Adam M. Reimer

Download or read book Susitna River Chinook Salmon Run Reconstruction and Escapement Goal Analysis written by Adam M. Reimer and published by . This book was released on 2020 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Susitna River drains approximately 52,000 square kilometers of the southern slopes of the Alaska Range and the Talkeetna mountains. This watershed supports wild populations of all 5 species of Pacific salmon and vibrant sport fisheries when production allows. Chinook salmon spawning escapements have been monitored since the late 1970s by aerial survey and a weir has been used to count returning adults on the Deshka River (a tributary) since 1995. The Deshka River is currently managed by an escapement goal based on weir passage whereas several other spawning populations are managed using escapement goals based only on once-per-year aerial surveys. Other fishery data, such as inriver and marine harvest estimates, age estimates, recent mark–recapture abundance estimates, and spawner distribution data are also available. We present a state-space model that incorporates all available datasets to generate annual inriver and spawning escapement abundance estimates of 4 stocks of Susitna River Chinook salmon. These stocks were created by dividing the drainage into geographical units similar to existing management units used in Alaska Department of Fish and Game sport fishing regulations: Deshka River, Eastside Susitna, Talkeetna River, and Yentna River. The state-space model estimates a spawner-recruitment (S-R) relationship for each stock that is used in developing escapement goal recommendations based on the number of spawners that provide maximum sustained yield (SMSY). SMSY was estimated for each stock: 12,564 for Deshka River; 12,971 for Eastside Susitna; 10,570 for Talkeetna River; and 13,614 for Yentna River. We used a decision matrix to choose escapement goals based on the probability of achieving maximum sustained yield for the 4 stocks. We recommend discontinuing escapement goals for individual spawning populations within these stocks and replacing them with stock-based escapement goals of 9,000–18,000 for Deshka River, 13,000–25,000 for Eastside Susitna, 9,000–17,500 for Talkeetna River, and 13,000–22,000 for Yentna River stocks.

Northeastern Bering Sea Juvenile Chinook Salmon Survey, 2017 and Yukon River Adult Run Forecasts, 2018-2020

Author : Kathrine G. Howard
Publisher :
ISBN 13 :
Total Pages : 53 pages
Book Rating : 4.:/5 (114 download)

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Book Synopsis Northeastern Bering Sea Juvenile Chinook Salmon Survey, 2017 and Yukon River Adult Run Forecasts, 2018-2020 by : Kathrine G. Howard

Download or read book Northeastern Bering Sea Juvenile Chinook Salmon Survey, 2017 and Yukon River Adult Run Forecasts, 2018-2020 written by Kathrine G. Howard and published by . This book was released on 2020 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monitoring of juvenile Yukon River Chinook salmon Oncorhynchus tshawytscha stocks rearing in the Northeastern Bering Sea (NBS) was initiated by the National Oceanic and Atmospheric Administration (NOAA) in 2002 using a pelagic trawl survey program. Juvenile salmon were caught after their first summer at sea, and prior work has demonstrated a clear relationship between juvenile abundance and future adult returns, enabling the use of juvenile data in adult run size forecasts. The estimated abundance of juvenile Chinook salmon in the NBS was approximately 2,480,000 (SD 439,000) in 2017, below the 2003-2016 average. The mean proportion of 2017 NBS juvenile Chinook salmon originating in the total Yukon River and Canadian-origin Yukon River was 72% (SD 5%) and 42% (SD 4%), respectively. Abundance of total Yukon and Canadian-origin stocks were estimated as 1,774,000 (SD 338,000) and 1,049,000 (SD 207,000), respectively. Previously established and new adult Yukon River run reconstructions were used to evaluate relationships between juvenile abundance and adult abundance of spawners, runs, and returns. A marked decrease in juvenile production (juveniles per spawner) for total Yukon River and Canadian-origin stocks was below their 2003-2016 averages. These data were incorporated into forecast models to predict total adult run size. Forecasted total Yukon River Chinook salmon run sizes for 2018-2020 were 179,000-301,000, 170,000-297,000 and 114,000-230,000, respectively; forecasted Canadian-origin Chinook salmon run sizes for 2018-2020 were 65,000-102,000, 74,000-116,000 and 62,000-105,000, respectively. The date-adjusted length (FL) of juvenile Chinook salmon in the NBS was 204 mm in 2017, below the 2003-2016 average of 212 mm. Marine data on juvenile Chinook salmon clearly demonstrate that Yukon River Chinook salmon should be expected to remain in a relatively low productivity regime in the near future, but record-low run abundance is unlikely through 2020.

The Bering Sea Ecosystem

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309053455
Total Pages : 317 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis The Bering Sea Ecosystem by : National Research Council

Download or read book The Bering Sea Ecosystem written by National Research Council and published by National Academies Press. This book was released on 1996-05-08 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bering Sea, which lies between the United States and Russia, is one of the most productive ecosystems in the world and has prolific fishing grounds. Yet there have been significant unexplained population fluctuations in marine mammals and birds in the region. The book examines the Bering Sea ecosystem's dynamics and the relationship between man and the ecosystem, in order to identify potential reasons for the population fluctuations as well as identify ways the Sea's living resources can be better managed by government.

The Bears of Brooks Falls: Wildlife and Survival on Alaska's Brooks River

Author : Michael Fitz
Publisher : The Countryman Press
ISBN 13 : 168268511X
Total Pages : 279 pages
Book Rating : 4.6/5 (826 download)

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Book Synopsis The Bears of Brooks Falls: Wildlife and Survival on Alaska's Brooks River by : Michael Fitz

Download or read book The Bears of Brooks Falls: Wildlife and Survival on Alaska's Brooks River written by Michael Fitz and published by The Countryman Press. This book was released on 2021-03-09 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: A natural history and celebration of the famous bears and salmon of Brooks River. On the Alaska Peninsula, where exceptional landscapes are commonplace, a small river attracts attention far beyond its scale. Each year, from summer to early fall, brown bears and salmon gather at Brooks River to create one of North America’s greatest wildlife spectacles. As the salmon leap from the cascade, dozens of bears are there to catch them (with as many as forty-three bears sighted in a single day), and thousands of people come to watch in person or on the National Park Service’s popular Brooks Falls Bearcam. The Bears of Brooks Falls tells the story of this region and the bears that made it famous in three parts. The first forms an ecological history of the region, from its dormancy 30,000 years ago to the volcanic events that transformed it into the Valley of Ten Thousand Smokes. The central and longest section is a deep dive into the lives of the wildlife along the Brooks River, especially the bears and salmon. Readers will learn about the bears’ winter hibernation, mating season, hunting rituals, migration patterns, and their relationship with Alaska’s changing environment. Finally, the book explores the human impact, both positive and negative, on this special region and its wild population.

Ecological Assessment of Selenium in the Aquatic Environment

Author : Peter M. Chapman
Publisher : CRC Press
ISBN 13 : 1439826781
Total Pages : 370 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Ecological Assessment of Selenium in the Aquatic Environment by : Peter M. Chapman

Download or read book Ecological Assessment of Selenium in the Aquatic Environment written by Peter M. Chapman and published by CRC Press. This book was released on 2010-05-06 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the work and contributions of 46 scientists, managers, and policymakers, Ecological Assessment of Selenium in the Aquatic Environment documents the state of the science and explores how to use this information when assessing and managing the environmental effects of Se. A focused discussion on the fate and effects of Se in aquatic ecosyste

Mathematical Analysis of Fish Stock Dynamics

Author : Elizabeth F. Edwards
Publisher :
ISBN 13 :
Total Pages : 226 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Mathematical Analysis of Fish Stock Dynamics by : Elizabeth F. Edwards

Download or read book Mathematical Analysis of Fish Stock Dynamics written by Elizabeth F. Edwards and published by . This book was released on 1989 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Saving All the Parts

Author : Rocky Barker
Publisher : Island Press
ISBN 13 : 1597268771
Total Pages : 283 pages
Book Rating : 4.5/5 (972 download)

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Book Synopsis Saving All the Parts by : Rocky Barker

Download or read book Saving All the Parts written by Rocky Barker and published by Island Press. This book was released on 2013-04-10 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: Saving All the Parts is a journalist's exploration of the intertwining of endangered species protection and the economic future of resource dependent communities -- those with local economies based on fishing, logging, ranching, mining, and other resource intensive industries. Rocky Barker presents an insightful overview of current endangered species controversies and a comprehensive look at the wide-ranging implications of human activities. The book analyzes trends in natural resource management, land use planning, and economic development that can lead to a future where economic activity can be sustained without the loss of essential natural values. Throughout, Barker provides a thorough and balanced analysis of both the ecological and economic forces that affect the lives and livelihoods of the nation's inhabitants -- both human and animal.

Marine Ecosystems of the North Pacific

Author : North Pacific Marine Science Organization, North Pacific Ecosystem Status Working Group Staff
Publisher : Sidney, B.C. : North Pacific Marine Science Organization
ISBN 13 :
Total Pages : 292 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Marine Ecosystems of the North Pacific by : North Pacific Marine Science Organization, North Pacific Ecosystem Status Working Group Staff

Download or read book Marine Ecosystems of the North Pacific written by North Pacific Marine Science Organization, North Pacific Ecosystem Status Working Group Staff and published by Sidney, B.C. : North Pacific Marine Science Organization. This book was released on 2004 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Fish and Fisheries in Estuaries

Author : Alan K. Whitfield
Publisher : John Wiley & Sons
ISBN 13 : 1119705355
Total Pages : 1595 pages
Book Rating : 4.1/5 (197 download)

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Book Synopsis Fish and Fisheries in Estuaries by : Alan K. Whitfield

Download or read book Fish and Fisheries in Estuaries written by Alan K. Whitfield and published by John Wiley & Sons. This book was released on 2022-02-18 with total page 1595 pages. Available in PDF, EPUB and Kindle. Book excerpt: Das zweibändige Werk Fish and Fisheries in Estuaries: A Global Perspective enthält eine Darstellung des aktuellen Wissensstandes über Fische in Ästuaren. In Beiträgen von mehr als fünfzig international anerkannten Forschern und Experten für Ichthyologie in Ästuaren präsentiert dieses wegweisende Übersichtswerk die Themen Fischbestände und funktionelle Gruppen, Rekrutierung und Produktion in Ästuaren, Ernährungsökologie und trophische Dynamik, Erhaltung von Fischen in Ästuaren und viele mehr. In dreizehn ausführlichen Kapiteln werden die wichtigsten Aspekte zu Fischen und Fischerei in Ästuaren rund um die Welt beschrieben. Es wird die Biologie der Fische in Ästuargewässern und ihre Verbindung zu den dortigen Ökosystemen betrachtet, und es wird analysiert, wie sich die menschengemachte Industrialisierung und globale Ereignisse wie der Klimawandel auf einheimische und andere Arten auswirken. Weitere Themen sind die Vielfalt der Lebensräume, das Verhalten von Fischen bei der Nahrungssuche, Instrumente und Modelle der Umwelttechnik, Gefahren und Risiken für Fische und Fischerei in Ästuaren sowie die Gesundheit der Umwelt in Ästuaren. Dieses maßgebliche Referenzwerk enthält detaillierte Informationen über die Biologie und Ökologie von Fischen und Fischerei in Ästuaren und bietet außerdem: * Eine Betrachtung aktueller Ansätze und künftiger Forschungsrichtungen, die darauf abzielen, ein Gleichgewicht zwischen der Nutzung und der Erhaltung von Fischen in Ästuaren zu erreichen * Eine Erörterung der Umweltqualitätsziele sowie der nachhaltigen Fischerei und Bewirtschaftung der Ästuare * Eine Untersuchung, wie sich die zunehmende Nutzung von Ressourcen wie Nahrung, Raum und Wasser durch den Menschen auf die Fischerei in den Ästuaren auswirkt * Zahlreiche internationale Fallstudien zum Fischereimanagement, zu bedrohten Arten, zur Sanierung von Ästuaren, zur Fortpflanzung und Ontogenese und weiteren Themen * Eine Darstellung der Studien- und Probenahmeverfahren, der Feldausrüstung sowie der Verarbeitung, Analyse und Interpretation der Daten Das Werk Fish and Fisheries in Estuaries: A Global Perspective ist ein unverzichtbares Hilfsmittel und eine Referenzquelle für Fischbiologen, Fischereiwissenschaftler, Ökologen und Umweltwissenschaftler, Gewässerökologen, Naturschutzbiologen sowie Studierende der höheren Semester und Dozenten im Bereich Fischbiologie und Fischerei.

Fisheries Buybacks

Author : Rita Curtis
Publisher : John Wiley & Sons
ISBN 13 : 047027655X
Total Pages : 288 pages
Book Rating : 4.4/5 (72 download)

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Book Synopsis Fisheries Buybacks by : Rita Curtis

Download or read book Fisheries Buybacks written by Rita Curtis and published by John Wiley & Sons. This book was released on 2008-02-15 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fisheries buybacks are an important strategy being implemented globally in the efforts to produce a more sustainable and profitable fisheries industry. Fisheries Buybacks provides the reader with an overview of buybacks and the issues surrounding them as well as a synthesis of the literature on this subject of growing importance. Alongside this material are eleven case studies from around the world that look at real life applications of buybacks and its successes and failures. Edited by two leading fisheries economists with chapters contributed by international experts in the field, Fisheries Buybacks will be a valuable resource for fisheries managers, economists, researchers, and policy makers for years to come.