Estimates of Chinook Salmon Passage in the Kenai River at River Mile 8.6 Using Dual-frequency Identification Sonar, 2013
Estimates of Chinook Salmon Passage in the Kenai River at River Mile 8.6 Using Dual-frequency Identification Sonar, 2013

Author: Brandon H. Key

Publisher:

Published: 2016

Total Pages: 93

ISBN-13:

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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.

Estimates of Chinook Salmon Passage in the Kenai River at River Mile 8.6 Using Dual-frequency Identification Sonar, 2014
Estimates of Chinook Salmon Passage in the Kenai River at River Mile 8.6 Using Dual-frequency Identification Sonar, 2014

Author: Brandon H. Key

Publisher:

Published: 2016

Total Pages: 98

ISBN-13:

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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.

Chinook Salmon Passage in the Kenai River at River Mile 13.7 Using Adaptive Resolution Imaging Sonar, 2013
Chinook Salmon Passage in the Kenai River at River Mile 13.7 Using Adaptive Resolution Imaging Sonar, 2013

Author: James D. Miller

Publisher:

Published: 2016

Total Pages: 119

ISBN-13:

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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.

Chinook Salmon Passage in the Kenai River at River Mile 13.7 Using Adaptive Resolution Imaging Sonar, 2017-2019
Chinook Salmon Passage in the Kenai River at River Mile 13.7 Using Adaptive Resolution Imaging Sonar, 2017-2019

Author: Brandon H. Key

Publisher:

Published: 2023

Total Pages: 0

ISBN-13:

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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.

Chinook Salmon Passage in the Kenai River at River Mile 13.7 Using Adaptive Resolution Imaging Sonar, 2016
Chinook Salmon Passage in the Kenai River at River Mile 13.7 Using Adaptive Resolution Imaging Sonar, 2016

Author: Brandon H. Key

Publisher:

Published: 2019

Total Pages: 104

ISBN-13:

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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.

Chinook Salmon Passage in the Kenai River at River Mile 13.7 Using Adaptive Resolution Imaging Sonar, 2015
Chinook Salmon Passage in the Kenai River at River Mile 13.7 Using Adaptive Resolution Imaging Sonar, 2015

Author: Brandon H. Key

Publisher:

Published: 2017

Total Pages: 120

ISBN-13:

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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.

Operational Plan
Operational Plan

Author: Brandon H. Key

Publisher:

Published: 2020

Total Pages: 130

ISBN-13:

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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.

Sonar Estimation of Salmon Passage in the Yukon River Near Pilot Station, 2013
Sonar Estimation of Salmon Passage in the Yukon River Near Pilot Station, 2013

Author: Kyle Schumann

Publisher:

Published: 2017

Total Pages: 76

ISBN-13:

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The Pilot Station sonar project has provided daily passage estimates for 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 2013 through a 2-component process: (1) estimation of total fish passage with 120 kHz split-beam sonar and a dual-frequency identification sonar, and (2) apportionment to species by sampling with a suite of gillnets of various mesh sizes. An estimated 4,700,423 fish passed through the sonar sampling area between June 13 and September 7. Of those fish, 1,107,859 passed along the right bank and 3,592,564 passed along the left bank. Included, with 90% confidence intervals, were 105,433 ± 31,754 large Chinook salmon (>655 mm mid eye to tail fork), 11,726 ± 5,862 small Chinook salmon (less than or equal to 655 mm mid eye tail fork), 2,747,218 ± 119,519 summer chum salmon, 716,727 ± 77,556 fall chum salmon, 84,795 ± 20,744 coho salmon, 4,624 ± 6,361 pink salmon, and 1,029,900 ± 79,741 other species.