Download or read book Chinook Salmon Passage in the Kenai River at River Mile 13 7 Using Adaptive Resolution Imaging Sonar 2016 written by Brandon H. Key and published by . This book was released on 2019 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2016, Kenai River Chinook salmon (Oncorhynchus tshawytscha) passage was estimated using adaptive resolution imaging sonar (ARIS) at river mile 13.7. Net upstream passage of Chinook salmon greater than or equal to 75 cm as measured by ARIS was estimated to be 6,391 (SE 197) during the early run (16 May–30 June) and 17,447 (SE 403) during the late run (1 July–19 August). Net upstream passage of all Chinook salmon regardless of size was estimated to be 9,851 (SE 355) during the early run and 22,537 (SE 480) during the late run.

Download or read book Chinook Salmon Passage in the Kenai River at River Mile 13 7 Using Adaptive Resolution Imaging Sonar 2017 2019 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: Chinook salmon (Oncorhynchus tshawytscha) passage in the Kenai River was estimated from 2017 to 2019 using adaptive resolution imaging sonar (ARIS) at river mile 13.7. Net upstream passage of Chinook salmon greater than or equal to 75 cm as measured each year by ARIS was estimated to be 7,238 (SE = 250), 3,000 (SE = 154), and 4,186 (SE = 160), respectively, during the 2017–2019 early runs (16 May–30 June); and 22,133 (SE = 452), 16,957 (SE = 410), and 11,870 (SE = 310), respectively, during the 2017–2019 late runs (1 July–20 August). Net upstream passage of all Chinook salmon regardless of size was estimated to be 9,696 (SE = 371), 5,390 (SE = 318), and 6,033 (SE = 285), respectively, during the 2017–2019 early runs; and 24,436 (SE = 423), 25,143 (SE = 654), and 18,093 (SE = 547), respectively, during the 2017–2019 late runs.

Download or read book Chinook Salmon Passage in the Kenai River at River Mile 13 7 Using Adaptive Resolution Imaging Sonar 2015 written by Brandon H. Key and published by . This book was released on 2017 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2015, Kenai River Chinook salmon (Oncorhynchus tshawytscha) passage was estimated using Adaptive Resolution Imaging Sonar (ARIS) at river mile 13.7. Net upstream passage of Chinook salmon greater than or equal to 75 cm as measured by ARIS was estimated to be 4,212 (SE 168) during the early run (16 May-30 June) and 17,687 (SE 377) during the late run (1 July-20 August). Net upstream passage of all Chinook salmon regardless of size was estimated to be 7,332 (SE 312) during the early run and 28,918 (SE 703) during the late run.

Download or read book Chinook Salmon Passage in the Kenai River at River Mile 13 7 Using Adaptive Resolution Imaging Sonar 2014 written by James D. Miller and published by . This book was released on 2016 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2014, Kenai River Chinook salmon (Oncorhynchus tshawytscha) passage was estimated using Adaptive Resolution Imaging Sonar (ARIS) at river mile 13.7. Net upstream passage of Chinook salmon greater than or equal to 75 cm as measured by ARIS was estimated to be 2,397 (SE 132) during the early run (16 May-30 June) and 10,871 (SE 291) during the late run (1 July-15 August). Net upstream passage of all Chinook salmon regardless of size was estimated to be 5,768 (SE 359) during the early run and 16,871 (SE 580) during the late run.

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 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 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 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 Estimates of Chinook Salmon Passage in the Kenai River at River Mile 8 6 Using Dual frequency Identification Sonar 2013 written by Brandon H. Key and published by . This book was released on 2016 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kenai River Chinook salmon (Oncorhynchus tshawytscha) passage was estimated in 2013 at RM 8.6 using dual-frequency identification sonar (DIDSON). Estimates of midriver Chinook salmon passage between and at least 3 m from the transducers were 1,439 (SE 138) fish for the early run (16 May-30 June) and 15,185 (SE 566) fish for the late run (1 July-15 August). The early-run estimate is too small to explain weir counts at upriver tributaries. Methods and results from a second experimental sonar site located above tidal influence at RM 13.7 are presented in a separate report.

Download or read book Estimates of Chinook Salmon Passage in the Kenai River at River Mile 8 6 Using Dual frequency Identification Sonar 2014 written by Brandon H. Key and published by . This book was released on 2016 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kenai River Chinook salmon (Oncorhynchus tshawytscha) passage was estimated in 2014 at RM 8.6 using dual-frequency identification sonar (DIDSON). Estimates of midriver Chinook salmon passage between and at least 3 m from the transducers were 4,862 (SE 338) fish for the early run (16 May-30 June) and 13,952 (SE 492) fish for the late run (1 July-15 August). Methods and result from a second experimental sonar site located above tidal influence at RM 13.7 are presented in a separate report.

Download or read book Estimates of Chinook Salmon Passage in the Kenai River at River Mile 8 6 Using Dual frequency Identification Sonar 2012 written by James D. Miller and published by . This book was released on 2015 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kenai River Chinook salmon (Oncorhynchus tshawytscha) passage was estimated in 2012 using dual-frequency identification sonar (DIDSON). Estimates of midriver Chinook salmon passage between and at least 3 m from the transducers were 3,228 (SE 191) fish for the early run (16 May-30 June) and 21,613 (SE 667) fish for the late run (1 July-15 August). DIDSON units temporarily deployed shoreward of the left and right bank transducers recorded large Chinook salmon (equal to or greater than 75 cm) migrating outside the standard insonified zone. The efficacy of installing sonar at river mile 13.7 was investigated and confirmed.

Download or read book Kenai and Kasilof River Sockeye Salmon Inriver Passage and Escapement Studies 2022 2024 written by William J. Glick and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-frequency Identification Sonar (DIDSON; Belcher et al. 2002) is used annually to estimate sockeye salmon Oncorhynchus nerka passage into the Kenai River of Upper Cook Inlet (UCI), Alaska (Figure 1). Adaptive Resolution Imaging Sonar (ARIS) is used to estimate sockeye salmon passage into the Kasilof River. Both multi-beam sonar systems are manufactured by Sound Metrics Corporation with ARIS being an upgraded replacement of the DIDSON. Sonar passage estimates of sockeye salmon are used for inseason management of UCI commercial fisheries, as well as personal use fisheries in the Kenai and Kasilof rivers, to achieve established escapement goals and inriver run goals. The current sustainable escapement goal (SEG) for sockeye salmon in the Kenai River is 750,000–1,300,000 fish. The inriver goal for sockeye salmon in the Kenai River is 1,000,000–1,200,000 fish if the forecasted return estimate is 2,300,000; 1,100,000–1,400,000 fish for a forecasted return of 2,300,000–4,600,000; and 1,200,000–1,600,000 fish for a forecasted return of 4,600,000 (Marston and Frothingham In prep). The Kasilof River optimal escapement goal (OEG) is 140,000–370,000 sockeye salmon, with a biological escapement goal (BEG) of 140,000–320,000. (McKinley et al. 2020). Fish wheels are used to capture migrating salmon for 1) species apportionment; 2) to estimate age, length, and sex composition of the sockeye salmon escapement; and, 3) to collect genetic samples as needed. Historical sonar passage and escapement data for the Kenai and Kasilof rivers (Table 1) is provided in yearly Regional Information and Fishery Data Series reports as exhibited by Glick and Marston (In prep). This plan outlines how sonar sampling and logistical operations will be conducted for each of these sonar enumeration sites.

Download or read book Sonar Estimation of Chinook and Fall Chum Salmon Passage in the Yukon River Near Eagle Alaska 2016 written by Michael J. McDougall and published by . This book was released on 2017 with total page 58 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 to October 6, 2016. A total of 72,329 Chinook salmon were estimated to have passed the sonar site between July 1 and August 17. The midpoint of the Chinook salmon run occurred on July 18, which was 6 days early relative to the historical mean date. An estimated 144,035 fall chum salmon passed between August 18 and October 6. The sonar-estimated passage of fall chum salmon was subsequently expanded to a total passage estimate of 161,025 to include fish that may have passed after operations ceased. The midpoint of the expanded fall chum salmon estimate occurred on September 26, which was 4 days later than the historical mean date. Subtracting the preliminary subsistence catch upstream of the sonar site resulted in an estimated border passage of 71,574 Chinook salmon and 148,071 fall chum salmon. Drift gillnetting was conducted to collect age, sex, and length samples and tissue samples for genetic information. Species composition was also recorded to determine when the Chinook salmon run ended and the fall chum salmon run began.

Download or read book Sonar Estimation of Chinook and Fall Chum Salmon Passage in the Yukon River Near Eagle 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: 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 June 28 through October 6, 2021. A total of 31,796 (SE 207) Chinook salmon were estimated to have passed the sonar site from June 28 through August 31. The midpoint of the Chinook salmon migration occurred on July 29, which was 5 days later than the historical mean date. A total of 19,668 (SE 243) fall chum salmon were estimated to have passed the sonar site from September 1 through October 6. The fall chum salmon passage estimate was subsequently expanded to a total of 23,170 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 27, which was 4 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 Chinook and Fall Chum Salmon Passage in the Yukon River Near Eagle Alaska 2020 written by Michael J. McDougall and published by . This book was released on 2023 with total page 0 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, 2020. A total of 33,550 (SE 219) Chinook salmon were estimated to have passed the sonar site from July 1 through August 27. The midpoint of the Chinook salmon migration occurred on July 29, which was 5 days later than the historical mean date. A total of 20,766 (SE 177) fall chum salmon were estimated to have passed the sonar site from August 28 through October 6. The fall chum salmon passage estimate was subsequently expanded to a total of 23,512 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 24, which was 1 day 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 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.