Download or read book Late run Kasilof River Chinook Salmon Sonar Assessment 2018 written by James D. Miller and published by . This book was released on 2020 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although a sport fishery for late-run Kasilof River Chinook salmon (Oncorhynchus tshawytscha) is prosecuted downstream of river kilometer (RKM) 13 and a commercial fishery occurs in nearby marine waters, the inriver abundance of late-run Kasilof River Chinook salmon has been unknown for most years. The goal of this study was to estimate the daily net upstream passage of salmon 75 cm or longer from mid eye to tail fork (METF) past RKM 13 of the Kasilof River from 15 June through 31 August 2018 using adaptive resolution imaging sonar (ARIS). Net upstream passage of Chinook salmon greater than or equal to 75 cm METF as measured by ARIS was estimated to be 3,458 (SE 166). Chinook salmon passage estimates were lower than those from a prior mark–recapture study, but run timing was similar.

Download or read book Late run Kasilof River Chinook Salmon Sonar Assessment 2019 2020 written by James D. Miller and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive resolution imaging sonar (ARIS) was used for the first time in 2018 to estimate the abundance of late-run Chinook salmon (Oncorhynchus tshawytscha) at river mile (RM) 8 of the Kasilof River. The same methods were used to estimate late-run Chinook salmon abundance in 2019 and 2020. In 2019, the sonar was operated from 15 June through 31 August. In 2020, the sonar was operated from 15 June through 22 August. Net upstream passage of late-run Chinook salmon greater than or equal to 75 cm mid eye to tail fork length (METF) as measured by ARIS was estimated to be 4,507 (SE = 184) in 2019 and 3,388 (SE = 165) in 2020. The 2019 cumulative late-run Chinook salmon abundance estimate of fish greater than or equal to 75 cm METF was higher than the 2018 and 2020 estimates. Run timing in 2019 and 2020 was earlier than in 2018.

Download or read book Operational Plan Kenai River and Kasilof River Chinook Salmon Sonar Assessment 2023 2025 written by Brandon H. Key and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alaska Department of Fish and Game (ADF&G) has monitored Chinook salmon (Oncorhynchus tshawytscha) passage in the Kenai River using side-looking sonar technology from 1987 to present at historical (1987–2012) and modern (2013–present) sites and with multiple updated sonar technologies. Starting in 2018, a similar sonar program to monitor Chinook salmon at the nearby Kasilof River was begun as well. This plan covers sonar project operations at Kenai RM 13.7 and Kasilof RM 8 for the 2023–2025 seasons with the goal of producing daily inseason net passage estimates of fish 75 cm or longer for the Kenai River and postseason net upstream passage estimates of fish 75 cm or longer for the Kasilof river.

Download or read book Amendment Kenai River Chinook Salmon Sonar Assessment at River Mile 13 7 2020 2022 written by Brandon H. Key and published by . This book was released on 2022 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive resolution imaging sonars (ARIS) are used to produce inriver abundance estimates of Kenai River early- and late-run Chinook salmon Onchorhynchus tshawytscha and Kasilof River late-run Chinook salmon. These sonars can be used to produce inseason estimates of fish 75 cm mid eye to tail fork length (METF) or longer, and when used over the entire run, can be used in conjunction with test fish data to produce postseason abundance estimates of all Chinook salmon regardless of size. Sonar estimates of Chinook salmon inriver passage provide the basis for estimating spawning escapement and implementing management plans that regulate harvest in the competing fisheries for these stocks.

Download or read book Operational Plan written by Brandon H. Key and published by . This book was released on 2020 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alaska Department of Fish and Game (ADF&G) has monitored Chinook salmon (Oncorhynchus tshawytscha) passage in the Kenai River using side-looking sonar technology from 1987 to present. The historical site at RM 8.6 used dual-beam (1987–1994), split-beam (1995–2011), and dual-frequency identification sonar or “DIDSON” (2012–2014) technology. Starting in 2013, ADF&G began operating adaptive resolution imaging sonar or “ARIS” at a new site located at RM 13.7. The RM 8.6 site was discontinued following the 2014 season in favor of data collection at the RM 13.7 site. This plan covers RM 13.7 project operations for the 2020–2022 seasons.

Download or read book Evaluation of Hydroacoustic Assessment Techniques for Chinook Salmon on the Kenai River Using Split beam Sonar written by Debby L. Burwen and published by . This book was released on 1995 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Unalakleet River Chinook Salmon Escapement Monitoring and Assessment 2018 written by Janet Bavilla and published by . This book was released on 2019 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Declining run sizes and ensuing state and federal restrictions and closures to Unalakleet River Chinook salmon Oncorhynchus tshawytscha fisheries have highlighted the need to obtain more complete estimates of spawning escapement. In response, multiple agencies and entities began the Unalakleet River weir in 2010, funded by the United States Fish and Wildlife Service, Office of Subsistence Management. The goal was to obtain estimates of Chinook salmon escapement and age, sex, and length composition. An estimated 3,326 Chinook salmon were enumerated during the 2018 season. High water in June delayed the start date of the project. Therefore, there was uncertainty about whether the entire run was enumerated. Based on the shortened operational period, the central 50% of the Chinook salmon run was enumerated between July 13 and July 17. Female Chinook salmon accounted for 24.2% of the fish sampled. Age composition of the sampled Chinook salmon was 65.6% age-1.3, 19.9% age-1.2, and 13.6% age-1.4.

Download or read book Chinook Salmon Passage in the Kenai River at River Mile 13 7 Using Adaptive Resolution Imaging Sonar 2013 written by James D. Miller and published by . This book was released on 2016 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2013, Kenai River Chinook salmon (Oncorhynchus tshawytscha) passage was estimated using Adaptive Resolution Imaging Sonar (ARIS) at a newly established site at river mile 13.7. Medium and large Chinook salmon (greater than or equal to 75 cm as measured by ARIS) were directly assessed by the sonar, yielding net upstream passage estimates of 1,724 (SE 93) during the early run (17 May-30 June) and 12,656 (SE 282) during the late run (1 July-17 August). Smaller Chinook salmon (less than 75 cm ARIS length) overlap in size with other species; thus a combination of sonar, netting, telemetry, and weir data from this and other projects are required for assessing the abundance of all Kenai River Chinook salmon regardless of size. During the 2013 early run, telemetry and weir data were used to obtain a net upstream passage estimate of 2,806 (SE 341) small Chinook salmon; this estimate was combined with the ARIS estimate of medium and large Chinook salmon for a total of 4,530 (SE 353) Chinook salmon regardless of size. During the late run, a mixture model was fitted to sonar and netting data to obtain a net upstream passage estimate of 19,373 (SE 583) Chinook salmon regardless of size.

Download or read book Operational Plan Yentna River Chinook Salmon Sampling and Lake Creek Chinook Salmon Sonar Assessment 2023 2025 written by Nicholas A. Decovich and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study will conduct a sonar count of the Yentna River drainage Chinook salmon (Oncorhynchus tshawytscha) run to Lake Creek and collect age data from the greater Yentna River run with fish wheels at river mile (RM) 6. Radio tags deployed at RM 6 will measure the proportion of the Yentna River run returning to Lake Creek. Data from this project will be incorporated into a run reconstruction model and spawner–recruit analysis to enable a better estimate of the run and escapement to the Yentna River.

Download or read book Operational Plan Yentna River Chinook Salmon Sampling and Lake Creek Chinook Salmon Sonar Assessment 2022 written by Nicholas A. Decovich and published by . This book was released on 2022 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study will conduct a sonar count of the Yentna River drainage Chinook salmon (Oncorhynchus tshawytscha) run to Lake Creek and collect age data from the greater Yentna River run with fishwheels at river mile (RM) 6. Radio tags deployed at RM 6 will be used to estimate the proportion of the Yenta River run returning to Lake Creek. Data from this project will be incorporated into a run reconstruction model and spawner–recruit analysis to enable a better estimate of the historic run and escapement to the Yentna River.

Download or read book Stock Assessment of Late run Chinook Salmon in the Kenai River 1999 2006 written by Timothy R. McKinley and published by . This book was released on 2010 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: The status of late-run Chinook salmon Oncorhynchus tshawytscha in the Kenai River was assessed using information from creel surveys, an inriver sonar project, educational harvests, an inriver gillnetting project, personal use fishery harvests, commercial fishery harvests, and the Alaska Statewide Harvest Survey. This report updates stock assessment statistics with data from 1999-2006.

Download or read book Spawner recruit Analyses and Escapement Goal Recommendations for Kenai River Chinook Salmon written by Steven J. Fleischman and published by . This book was released on 2017 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Age-structured state-space spawner-recruit models were fit to 1986-2015 data on abundance, harvest, and age composition for early and late runs of Kenai River Chinook salmon (Oncorhynchus tshawytscha), 75 cm mid eye to tail fork (METF) and longer. Historical annual run abundance, stock recruitment parameters, and fishery management reference points were estimated from these models. Sustainable Escapement Goals of 2,800-5,600 (early run) and 13,500-27,000 (late run) Chinook salmon 75 cm METF and longer are recommended, and their attributes and limitations discussed. Fish 75 cm METF (approximately 33.3 in total length) and longer can be assessed directly by imaging sonar in the Kenai River at river mile 13.7.

Download or read book Abundance of Late run Kasilof River Chinook Salmon 2005 2008 written by Adam M. Reimer and published by . This book was released on 2012 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stock Assessment of the Return of Late Run Chinook Salmon to the Kenai River 1991 written by Stephen Hammarstrom and published by . This book was released on 1992 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stock Assessment of the Return of Late run Chinook Salmon to the Kenai River 1992 written by Stephen Hammarstrom and published by . This book was released on 1993 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stock Assessment of Late run Chinook Salmon of the Kenai River 1997 and 1998 written by Stephen Hammarstrom and published by . This book was released on 2001 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Late run Kasilof River Chinook Salmon Sport Harvest 2002 2003 written by Jeffery A. Breakfield and published by . This book was released on 2007 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: