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The AKSSF program has funded around 1,000 projects since its inception in 2000. Use a key word search to find the projects that interest you, click on a marker in the map to learn more, or explore the filters to refine your search by region, year, objective, etc. (Please note that many of the projects funded prior to 2014 are no longer eligible for AKSSF funding.)
Explore AKSSF’s current set of objectives

Evaluating Ichthyophonus-Associated Mortality of Yukon River Canadian-Origin Chinook Salmon

Synopsis:Ichthyophonus disease (ichthyophoniasis) resulting in natural en route mortality of Canadian-origin Yukon River Chinook salmon (Oncorhynchus tshawytscha) is a leading hypothesis to explain two successive years (2020 and 2021) of failure to achieve U.S./Canada border passage objectives per the Yukon River Salmon Agreement despite adequate run sizes detected near the mouth of the Yukon River and unprecedented harvest restrictions. This project will 1) determine if ichthyophoniasis is associated with en route mortality; 2) estimate the lethal Ichthyophonus infection “threshold” range for Canadian-origin Chinook salmon to assess the risk that observed infections pose to the annual salmon run; and 3) develop a model to assess the proportion of the annual Canadian-origin Chinook salmon run past Pilot Station sonar with infections above the lethal threshold. A fish health assessment will also be conducted to assess other relevant diseases/factors that can influence the course of ichthyophoniasis.
Project #:56002
Project Period:3/1/2023 - 6/30/2025
Location(s):Pilot Station sonar test fishery, Rampart Rapids, Eagle sonar test fishery
Cost:$240,930
Match:$84,559
Region:AYK
Federal Fiscal Year:2022
Project Data:https://doi.org/10.7944/P92U48S6
Investigator(s) Statement of Work AKSSF Reports
Semiannual Report 11/1/2022 - 4/30/2023 PDF
Semiannual Report 5/1/2023 - 10/31/2023 PDF
Semiannual Report 11/1/2023 - 4/30/2024 PDF
Semiannual Report 5/1/2024 - 10/31/2024 PDF
Semiannual Report 11/1/2024 - 4/30/2025 PDF
Completion ReportPDF
Optional Reports
TitleDescription
23-45 draft lab report (2023 Pilot)
24-18 lab report (Expt Ich study Ship Ck kings)
24-26 lab report (Whitehorse broodfish)
24-43 lab report (ADFG advise USFWS re-assess histology) Interobserver histopathology variability study with ADFG Fish Pathology Lab advising USFWS to improve their infection density estimates to be more accurate.
25-14 lab report (Salcha R eggtake for Expt Ich study)
AFS presentation
Herron MS thesis
Herron MS thesis defense ppt
Lab examination report 2023-0001 2022 Pilot Station Lab Report
Lab examination report 2023-0004 2022 Rampart Rapids Lab Report
Lab examination report 2023-0005 2022 Eagle Lab Report
Lab examination report 2024-0018 Lab Report for Pilot Study of Infection Challenge
NOAA Talk Powerpoint overview of Ichthyophonus research, invited talk
Poster Poster presented at AFS Alaska meeting
Powerpoint Emmonak & Alukanuk meettings Powerpoint presentation from Emmonak and Alukanuk community meetings that the PI was invited to present at
Powerpoint presentation Powerpoint Presentation for AFS Alaska meeting
YRDFA Fall 2023 Newsletter Article YRDFA Fall 2023 Newsletter
YRDFA Spring 2023 Newsletter Article YRDFA Spring 2023 Newsletter Article
YRDFA Spring News article- Discussing Ichthyophonus and Fish Health with ADF&G's Fish Pathologist Outreach on project

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For technical support, questions, or comments, please contact Debbie Maas at debbie.maas@alaska.gov.