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 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 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 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 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 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 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 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 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 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 Abundance Distribution and Migration Patterns of Summer Chum Salmon in the Yukon River Drainage 2014 2015 written by Sean Larson and published by . This book was released on 2017 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summer chum salmon (Oncorhynchus keta) in the Yukon River support robust commercial and subsistence fisheries; however, fishery managers have had incomplete information about their run timing, spawning distribution, stock composition, and abundance. To address this, a radiotelemetry study was implemented on summer chum salmon in 2014 and 2015. A total of 1,232 (2014) and 1,199 (2015) summer chum salmon were fitted with radio transmitters. Radiotagged summer chum salmon were mapped, travel rates were estimated, and proportions of tagged fish recovered within different tributaries were determined. Basic mark-recapture assumptions were tested and abundance above the tagging site was estimated. Summer chum salmon were found to be widely distributed within the Yukon River drainage. Although a few tagged fish were observed in most locations, roughly 50% of tagged fish were observed in the Anvik, Koyukuk, and Bonasila rivers each year. Summer chum salmon destined for upper river spawning areas traveled faster than those to lower river areas. Summer chum salmon tended to recover quickly after being tagged, and traveled relatively fast within the mainstem Yukon River, but slowed down after entering their spawning tributaries. The 2014 mark-recapture abundance estimate was about 2,100,000 fish, which corresponded with summer chum salmon passage at the mainstem Yukon River sonar near Pilot Station. The 2015 mark-recapture abundance estimate was also about 2,100,000 fish, which was larger than the summer chum salmon passage at the sonar near Pilot Station. Results from this study help to evaluate sonar passage estimates and provide fishery managers with more detailed information about distribution and migratory patterns of individual summer chum salmon stocks within the Yukon River drainagewide population.

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 Anvik River Sonar Chum Salmon Escapement Study 2010 written by Malcolm S. McEwen and published by . This book was released on 2011 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses the 2010 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 2009 written by Malcolm S. McEwen and published by . This book was released on 2010 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses the 2009 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 2008 written by Malcolm S. McEwen and published by . This book was released on 2010 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses the 2008 Anvik River sonar project, which operated from late June until the end of July and estimated the passage of summer chum salmon, Oncorhynchus keta.