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Alaska Department of Fish and Game


Kenai Chinook Estimates, Indices and Inseason Run Summaries

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Location: Kenai River (king salmon)
Species: Chinook - Late Run
Method: Sonar

The selected years are color-coded in the graphs below:

  • 2014
  • 2013
  • 2012
  • 2011
  • 2010
Daily Counts
Cumulative

Description: The DIDSON sonar estimates will be updated twice weekly. The daily estimates represent king salmon of all age and size classes and is expanded by 1.28 to account for late-run king salmon passing outside of the ensonified zone. This DIDSON sonar estimate is used to measure total run abundance relative to the late-run king salmon sustainable escapement goal of 15,000–30,000 fish. To view daily estimates about king salmon passage go to the Indices of king salmon abundance tab which is updated as data becomes available. The inseason run summary tab will provide information about king salmon passage at the mile 8.6 DIDSON sonar site external link, netting project, creel survey, water conditions and management actions twice each week. Information about the status of the run and inseason management actions are also available by telephone at (907) 262-9097.

Contact: Area Management Biologist,
(907) 262-9368

Weekly Sportfish Fishing Report for this area

46 records returned for the years selected. Dashes indicate days with no count.
[Export results in Excel format]

Date
2014
Count
2014
Cumulative
2014
Cumulative
2013
Cumulative
2012
Cumulative
2011
Notes for
2014
Aug-15 - 0 17,028 25,587 26,928  
Aug-14 - 0 16,895 25,587 26,928  
Aug-13 - 0 16,590 25,587 26,928  
Aug-12 - 0 16,316 25,587 26,928  
Aug-11 - 0 16,120 25,587 26,928  
Aug-10 - 0 15,906 25,587 26,928  
Aug-09 - 0 15,682 24,479 26,762  
Aug-08 - 0 15,493 23,602 26,354  
Aug-07 - 0 15,324 22,829 26,131  
Aug-06 - 0 15,131 21,592 25,873  
Aug-05 - 0 14,880 20,857 25,328  
Aug-04 - 0 14,605 20,487 24,817  
Aug-03 - 0 14,230 19,822 24,681  
Aug-02 - 0 13,813 19,076 24,485  
Aug-01 - 0 13,529 18,314 24,328  
Jul-31 - 0 13,023 17,453 23,978  
Jul-30 - 0 12,423 16,351 23,269  
Jul-29 - 0 11,746 15,625 22,879  
Jul-28 - 0 10,943 14,783 22,536  
Jul-27 - 0 10,503 13,660 22,308  
Jul-26 - 0 10,032 12,559 21,844  
Jul-25 - 0 9,365 11,627 21,269  
Jul-24 - 0 8,948 11,001 20,322  
Jul-23 - 0 8,678 10,394 19,433  
Jul-22 - 0 8,291 10,112 18,450  
Jul-21 - 0 7,954 9,476 17,545  
Jul-20 - 0 7,743 8,958 16,347  
Jul-19 - 0 7,497 8,127 15,449  
Jul-18 - 0 7,090 7,681 14,353  
Jul-17 - 0 6,401 6,960 13,178  
Jul-16 - 0 5,733 5,676 11,281  
Jul-15 - 0 4,985 5,164 10,456  
Jul-14 - 0 4,441 4,840 9,515  
Jul-13 - 0 3,513 4,029 7,998  
Jul-12 - 0 2,974 3,175 6,789  
Jul-11 - 0 2,709 2,670 6,122  
Jul-10 - 0 2,253 2,126 5,796  
Jul-09 - 0 1,722 1,481 5,126  
Jul-08 - 0 1,365 1,161 4,668  
Jul-07 - 0 1,196 993 4,025  
Jul-06 - 0 1,032 838 2,952  
Jul-05 - 0 900 711 2,442  
Jul-04 - 0 695 636 1,970  
Jul-03 - 0 523 539 1,569  
Jul-02 - 0 360 382 1,136  
Jul-01 - 0 174 241 479  

Sonar Tools

Late Run DIDSON Threshold (>30 in.) Sonar Estimate

The DIDSON threshold estimate is an estimate for fish targets that are measured to be 750 millimeters (30 inches) or greater in total length. These estimates are a daily index of the relative abundance of king salmon passage between the transducers at the mile 8.6 sonar and are not expanded to estimate passage of fish outside the ensonified zone.

Show DIDSON Threshold Data Table ↓

Date 2013 2012 2011
Jul-01 164 175 272
Jul-02 273 269 616
Jul-03 376 372 852
Jul-04 479 425 1,059
Jul-05 588 463 1,313
Jul-06 654 541 1,572
Jul-07 738 637 2,129
Jul-08 841 727 2,497
Jul-09 1,022 943 2,793
Jul-10 1,317 1,425 3,149
Jul-11 1,582 1,769 3,330
Jul-12 1,727 2,064 3,711
Jul-13 2,041 2,558 4,369
Jul-14 2,530 3,021 5,277
Jul-15 2,832 3,250 5,776
Jul-16 3,279 3,564 6,325
Jul-17 3,641 4,335 7,551
Jul-18 4,021 4,757 8,375
Jul-19 4,250 5,046 9,328
Jul-20 4,407 5,697 10,299
Jul-21 4,546 6,047 11,108
Jul-22 4,745 6,492 11,694
Jul-23 4,997 6,685 12,352
Jul-24 5,159 7,076 13,076
Jul-25 5,400 7,525 13,801
Jul-26 5,768 8,030 14,224
Jul-27 6,046 8,740 14,508
Jul-28 6,330 9,457 14,665
Jul-29 6,807 9,982 14,885
Jul-30 7,266 10,412 15,129
Jul-31 7,652 11,069 15,533
Aug-01 7,978 11,533 15,749
Aug-02 8,173 12,027 15,843
Aug-03 8,481 12,528 15,952
Aug-04 8,735 13,021 16,030
Aug-05 8,916 13,274 16,345
Aug-06 9,091 13,856 16,719
Aug-07 9,224 14,775 16,894
Aug-08 9,350 15,378 17,058
Aug-09 9,477 16,011 17,348
Aug-10 9,634 16,909 17,460
Aug-11 9,809 17,403 -
Aug-12 9,989 17,789 -
Aug-13 10,169 18,121 -
Aug-14 10,392 18,408 -
Aug-15 10,504 18,521 -

Late Run Sonar Net Apportioned Cumulative Passage Estimates

The Net Apportioned sonar estimate of Chinook salmon passage is based on the combination of the number of fish detected by sonar and number of Chinook salmon captured by the netting project conducted at the sonar station located at river mile 8.6.


Non-Sonar Tools

Late Run Netting Project CPUE Index

The Net Catch Per Unit Effort (CPUE) is an index of the numbers of Chinook salmon moving into the Kenai River and is based on the rate at which Chinook salmon are captured by the netting project conducted at the sonar station located at river mile 8.6.


Late Run Sport CPUE Index

The Sport Catch Per Unit Effort (CPUE) is an index of the numbers of Chinook salmon in the lower Kenai River and is based on the success rate of anglers fishing downstream of the Sterling Highway Bridge Crossing in Soldotna.

Late Run Eastside Setnet CPUE Index

The Eastside Setnet Catch per Unit Effort (CPUE) is an index of the total number of late-run Kenai River Chinook salmon.

Weekly Sportfish Fishing Report for this area

See also the prior Final Early Run Chinook Inseason Summary


Final Late Run Kenai River Chinook Inseason Summary

 
King salmon run update: 

On August 15, the final day of DIDSON sonar operation at river mile 8.6, the daily estimated passage was 133 king salmon for a preliminary season total of 17,028 king salmon. For the 2013 late-run, the DIDSON sonar estimate as well as indices used to assess inriver abundance indicated a run that was the lowest on record. The sustainable escapement goal (SEG) for Kenai River late-run king salmon is 15,000 to 30,000 king salmon. The sport harvest of king salmon in the Kenai River as estimated by an in-season creel survey was 1,577 fish through Wednesday, July 24, before going to catch and release, then closing prior to the end of the season. The preliminary total estimated inriver mortality (harvest and catch and release mortality) above the sonar is 1,619 fish. Therefore, the preliminary inseason escapement estimate is 15,409.

The department is continuing the king salmon sonar research project at river mile 13.7 and the netting project through August 17. In addition, the king salmon radio telemetry project will continue well into the fall. These research projects are not yet completed for the year and are designed to provide information to investigate operating DIDSON sonar for future inseason management of king salmon at a river mile 13.7.

This is the final update for the 2013 late-run Kenai River king salmon inseason assessment project.

Fishery Update:

The inriver sport fishery for Kenai River king salmon is closed by regulation. Daily catches of sockeye salmon have declined sharply while coho salmon catches have increased over the past week in the netting project conducted at the sonar station. Coho salmon catches thru August 10 have been the highest recorded in the 12 years since the netting project was standardized.

Water Conditions:

Water clarity: 0.6 meters at the river mile 8.6 sonar station.

Water flow/current: 18,100 ft3/sec today and cresting vs. 48 yr. median (14,100 ft3/sec). Water level is higher than the average of 15,000 ft3/sec for this time of year.

Water temperature: August 15, 50° F at the river mile 8.6 king sonar station.

Summary of cumulative raw information collected thru Aug 15 (by year) that is used to assess Kenai River king salmon run strength.
Year Number Chinook Captured in Test Net at Sonar Station Number Sockeye Captured in Test Net at Sonar Station Chinook Sport Harvest Below Soldotna Estimated by Creel Survey Cumulative DIDSON Sonar Estimate Cumulative Net Apportioned Sonar Estimate Commercial Set Net Harvest
2002 1,171 1,915 11,482 N/A 61,490 9,478
2003 1,446 1,464 13,837 N/A 92,115 14,810
2004 1,077 749 14,494 N/A 110,367 21,684
2005 1,027 730 15,312 N/A 125,872 22,101
2006 1,330 566 13,190 N/A 77,176 9,956
2007 780 1,979 9,258 N/A 43,317 12,288
2008 895 1,435 9,272 N/A 52,958 7,573
2009 559 1,798 7,378 N/A 26,066 5,588
2010 311 3,454 5,375 24,292 18,116 7,038
2011 472 3,548 6,458 26,926 27,584 7,697
2012 345 3,685 102 28,050 20,435 704
2013 200 2,048 1,577 17,028 17,758 2,462

NOTE: N/A means that there is no fishery for that date, and an asterisk (*) means that there is no data for that date.