Download or read book Sonar Estimation of Summer Chum and Pink Salmon in the Anvik River Alaska 2019 written by Naomi B. Brodersen and published by . This book was released on 2021 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-frequency identification sonar (DIDSON) was used to estimate adult summer chum salmon Oncorhynchus keta and pink salmon O. gorbuscha passage in the Anvik River from June 16 to July 26, 2019. Apportionment to species was determined from data collected from tower counts. A total of 249,014 (SE 2,034) summer chum and 241 (SE 81) pink salmon were estimated to have passed the sonar site. A beach seine sample fishery was conducted to collect age, sex, and length information. Both sonar systems functioned well with minimal interruptions to operation. The range of ensonification was considered adequate for most fish that migrated upstream.

Download or read book Sonar Estimation of Summer Chum and Pink Salmon in the Anvik River Alaska 2018 written by Naomi B. Brodersen and published by . This book was released on 2019 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-frequency identification sonar (DIDSON) was used to estimate adult summer chum salmon Oncorhynchus keta and pink salmon O. gorbuscha passage in the Anvik River from June 15 to July 26, 2018. Apportionment to species was determined using data collected from tower counts. A total of 305,098 (SE 5,926) summer chum and 1,122,346 (SE 7,588) pink salmon were estimated to have passed the sonar site. A beach seine sample fishery was conducted to collect age, sex, and length information. Both sonar systems functioned well with minimal interruptions to operation. Range of ensonification was considered adequate for most fish that migrated upstream.

Download or read book Sonar Estimation of Summer Chum and Pink Salmon in the Anvik River Alaska 2021 written by Naomi B. Brodersen and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-frequency identification sonar (DIDSON) was used to estimate adult summer chum salmon Oncorhynchus keta and pink salmon O. gorbuscha passage in the Anvik River from June 15 to July 26, 2021. Apportionment to species was determined from data collected from tower counts. A total of 18,819 (SE 273) summer chum and 0 pink salmon were estimated to have passed the sonar site. A beach seine sample fishery was conducted to collect age, sex, and length information; however, high water prevented fishing for part of the season. In addition, because of low salmon passage, few fish were caught, and the sample fishery was discontinued early. Both sonar systems functioned well with minimal interruptions to operation. The range of ensonification was considered adequate for most fish that migrated upstream.

Download or read book Sonar Estimation of Summer Chum and Pink Salmon Abundance in the Anvik River 2023 written by Jody D. Lozori and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alaska Department of Fish and Game (ADF&G), actively manages chum salmon fisheries in the Yukon River drainage. The purpose of the Anvik River sonar project is to monitor escapement of summer chum salmon Oncorhynchus keta and pink salmon O. gorbuscha in the Anvik River drainage, believed to be the largest producer of summer chum salmon in the Yukon River drainage (Hayes et al. 2008, Larson et al. 2017). Timely and accurate reporting of information from the Anvik River sonar project helps Yukon River fishery managers ensure the Anvik River Biological Escapement Goal (BEG) of 350,000 to 700,000 summer chum salmon is met (ADF&G 2004). This assessment is necessary to determine if summer chum salmon abundance will meet downstream harvest and upstream escapement needs. Fishery openings and closures may be based in part upon this assessment. This project uses imaging sonar equipment on the Anvik River to generate timely, in-season passage estimates of salmon (Brodersen 2021). Beach seine sampling is conducted to collect biological data used in characterizing the summer chum salmon run and tower estimates are used to apportion passage estimates to species. The project site is located approximately 76 km upstream from the mouth of the Anvik River (Figures 1 and 2) and is scheduled to operate continuously from approximately June 16 through July 26, 2023.

Download or read book Sonar Estimation of Summer Chum and Pink Salmon in the Anvik River Alaska 2022 written by Naomi B. Brodersen and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-frequency identification sonar (DIDSON) was used to estimate adult summer chum salmon Oncorhynchus keta and pink salmon O. gorbuscha passage in the Anvik River from June 15 to July 26, 2022. Apportionment to species was determined using data collected from tower counts. A total of 46,436 (SE 769) summer chum and 8,597 (SE 610) pink salmon were estimated to have passed the sonar site. A beach seine sample fishery was conducted to collect age, sex, and length information. In addition, because of low salmon passage, few fish were caught, and the sample fishery was discontinued early. Both sonar systems functioned well with minimal interruptions to operation. The range of ensonification was considered adequate for most fish that migrated upstream.

Download or read book Sonar Estimation of Summer Chum and Pink Salmon in the Anvik River Alaska 2017 written by Jody D. Lozori and published by . This book was released on 2018 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-frequency identification sonar (DIDSON) was used to estimate adult summer chum salmon Oncorhynchus keta and pink salmon O. gorbuscha passage in the Anvik River from June 15 to July 26, 2017. Apportionment to species was determined from data collected from tower counts. A total of 415,139 (SE 2,614) summer chum and 865 (SE 300) pink salmon were estimated to have passed the sonar site. A beach seine sample fishery was conducted to collect age, sex, and length information. Both sonar systems functioned well with minimal interruptions to operation. Range of ensonification was considered adequate for most fish that migrated upstream.

Download or read book Sonar Estimation of Summer Chum and Pink Salmon in the Anvik River Alaska 2016 written by Jody D. Lozori and published by . This book was released on 2017 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-frequency identification sonar (DIDSON) was used to estimate adult summer chum salmon Oncorhynchus keta and pink salmon Oncorhynchus gorbuscha passage in the Anvik River from June 16 to July 26, 2016. Apportionment to species was determined from data collected from tower counts. A total of 337,819 summer chum and 663,617 pink salmon were estimated to have passed the sonar site. A beach seine sample fishery was conducted to collect age, sex, and length information. Both sonar systems functioned well with minimal interruptions to operation. Range of ensonification was considered adequate for most fish that migrated upstream.

Download or read book Sonar Estimation of Summer Chum and Pink Salmon in the Anvik River Alaska 2014 written by Jody D. Lozori and published by . This book was released on 2015 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-frequency identification sonar (DIDSON) was used to estimate adult summer chum salmon Oncorhynchus keta and pink salmon Oncorhynchus gorbuscha passage in the Anvik River from June 17 to July 26, 2014. Apportionment to species was determined from data collected from tower counts. A total of 399,796 summer chum and 973,254 pink salmon were estimated to have passed the sonar site. A beach seine sample fishery was conducted to collect age, sex, and length information. Timing of the 2014 summer chum salmon run was 2 days early at the first quartile, and 3 days early at the third quartile compared to the average historic run timing based on 1979-1984 and 1987-2013 runs. Female summer chum salmon accounted for 54.6% of the entire summer chum salmon run. Age 0.3 summer chum salmon made up an estimated 44.8% of the passage; age 0.4 accounted for 48.3%. Both sonar systems functioned well with minimal interruptions to operation. Range of ensonification was considered adequate for most fish that migrated upstream.

Download or read book Sonar Estimation of Summer Chum Salmon Passage in the Anvik River Alaska 2015 written by Jody D. Lozori and published by . This book was released on 2016 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A dual-frequency identification sonar (DIDSON) was used to estimate summer chum salmon Oncorhynchus keta passage in the Anvik River from June 17 to July 27, 2015. A total of 374,968 summer chum salmon were estimated to have passed the sonar site. A beach seine sample fishery was conducted to collect age, sex, and length (ASL) and genetic information. Both systems functioned well with minimal interruptions to operation. The range of ensonification was considered adequate for most fish that migrated upstream.

Download or read book Sonar Estimation of Chinook and Fall Chum Salmon Passage in the Yukon River Near Eagle Alaska 2019 written by Michael J. McDougall and published by . This book was released on 2020 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive resolution imaging sonar (ARIS) and split-beam sonar equipment were used to estimate Chinook salmon Oncorhynchus tshawytscha and fall chum salmon O. keta passage in the Yukon River near Eagle, Alaska from July 1 through October 6, 2019. A total of 45,560 (SE = 274) Chinook salmon were estimated to have passed the sonar site from July 1 through August 14. The midpoint of the Chinook salmon migration occurred on July 26, which was 2 days later than the historical mean date. A total of 101,678 (SE = 544) fall chum salmon were estimated to have passed the sonar site from August 15 through October 6. The fall chum salmon passage estimate was subsequently expanded to a total of 113,256 to include fish that may have passed after operations ceased. The midpoint of the fall chum salmon migration (based on the expanded estimate) occurred on September 25, which was 2 days later than the historical mean date. Drift gillnetting was conducted to collect age, sex, and length samples and tissue samples for genetic information. Species composition was analyzed to determine when the Chinook salmon migration ended, and the fall chum salmon migration began.

Download or read book Sonar Estimation of Salmon Passage in the Yukon River Near Pilot Station 2019 written by Ryan P. Morrill and published by . This book was released on 2021 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Pilot Station sonar project has provided daily passage estimates of Chinook (Oncorhynchus tshawytscha), chum (O. keta), and coho (O. kisutch) salmon for most years since 1986. Fish passage estimates for each species were generated in 2019 using a 2-component process: (1) estimation of total fish passage with 120 kHz split-beam sonar and an adaptive resolution imaging sonar, and (2) apportionment to species by sampling using a suite of gillnets of various mesh sizes. An estimated 3,161,920 fish passed through the sonar sampling area between June 2 and August 31. Of those fish, 690,494 passed along the right bank, and 2,471,426 passed along the left bank. Included, with 90% confidence intervals, were 172,242 ± 18,964 large Chinook salmon (>655 mm to fork of tail), 47,382 ± 7,725 small Chinook salmon (≤655 mm to fork of tail), 1,402,925 ± 85,902 summer chum salmon, 842,041 ± 37,151 fall chum salmon, 86,401 ± 9,530 coho salmon, 42,353 ± 8,893 pink salmon, 270,434 ± 36,596 cisco, 196,905 ± 30,456 humpback whitefish, 25,694 ± 5,256 broad whitefish, 22,673 ± 5,948 sheefish, and 52,870 ± 5,659 other species.

Download or read book Anvik River Sonar Chum Salmon Escapement Study 2013 written by Malcolm S. McEwen and published by . This book was released on 2015 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses the 2013 Anvik River sonar project, which operated from June 17 to July 26 and estimated the passage of summer chum salmon, Oncorhynchus keta.

Download or read book Anvik River Sonar Chum Salmon Escapement Study 2012 written by Malcolm S. McEwen and published by . This book was released on 2014 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses the 2012 Anvik River sonar project, which operated from June 18 to July 26 and estimated the passage of summer chum salmon, Oncorhynchus keta.

Download or read book Estimating Abundance of Pink and Chum Salmon Fry in Prince William Sound 1957 written by Howard David Tait and published by . This book was released on 1962 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Anvik River Sonar Chum Salmon Escapement Study 2011 written by Malcolm S. McEwen and published by . This book was released on 2012 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses the 2011 Anvik River sonar project, which operated from late June until the end of July and estimated the passage of summer chum salmon, Oncorhynchus keta.

Download or read book Anvik River Sonar Chum Salmon Escapement Study 2003 written by Roger D. Dunbar and published by . This book was released on 2007 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses the 2003 Anvik River sonar project, which operated from mid-June until the end of July and estimated the passage of summer chum salmon, Oncorhynchus keta.

Download or read book Sonar Estimation of Salmon Passage in the Yukon River Near Pilot Station 2021 written by Ryan P. Morrill and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Pilot Station sonar project has provided daily passage estimates of Chinook (Oncorhynchus tshawytscha), chum (O. keta), and coho (O. kisutch) salmon for most years since 1986. Fish passage estimates for each species were generated in 2021 using a 2-component process: (1) estimation of total fish passage with 120 kHz split-beam sonar and an adaptive resolution imaging sonar, and (2) apportionment to species by sampling using a suite of gillnets of various mesh sizes. An estimated 1,040,660 fish passed through the sonar sampling area between May 31 and September 7. Of those fish, 218,819 passed along the right bank, and 821,841 passed along the left bank. Included, with 90% confidence intervals, were 104,267 ± 10,339 large Chinook salmon (>655 mm from middle of the eye to tail fork [METF]), 20,578 ± 3,232 small Chinook salmon (≤655 mm METF), 153,718 ± 16,149 summer chum salmon, 146,197 ± 11,686 fall chum salmon, 37,255 ± 3,879 coho salmon, 22,181 ± 5,832 pink salmon, 195,566 ± 25,264 cisco, 264,160 ± 21,191 humpback whitefish, 23,859 ± 3,971 broad whitefish, 34,820 ± 5,374 sheefish, and 38,059 ± 4,846 other species.