Findings and Updates
Prince William Sound Science Center (PWSSC), and Sitka Sound Science Center (SSSC), have been engaged in scientific data collection and analysis services requested under contract with the State of Alaska for a project entitled "Interactions of Wild and Hatchery Pink and Chum Salmon in Prince William Sound and Southeast Alaska". This contract work began in March, 2011, and is expected to continue through 2023. The State of Alaska provided capital funds to initiate the project with additional primary funding provided annually by salmon processors and fishery enhancement organizations. The State continues to contribute to through significant in kind work and by securing grant funding.
North Pacific Research Board (NPRB)
Saltonstall-Kennedy (SK) Grant Program
The overarching purposes of this research are to: 1) further document the degree to which hatchery pink and chum salmon straying is occurring; 2) assess the range of interannual variability in the straying rates; and, 3) determine the effects of hatchery fish spawning with wild populations on the fitness of wild populations.
This research project has been subdivided into four major activities for implementation, each with a separate project leader: ocean sampling near PWS; stream sampling in PWS; stream sampling in SEAK; and data management, analysis, and reporting.
Reports made to ADF&G, as described in the Request for Proposal (RFP), will be posted below. Reports will consist of a complete description of preceding field data methods and the data collected. Reports will include any analyses that can be made with the data available up to that time. Reports will be progressive, i.e., will include all data and analyses from the beginning of the project up to the date of the report.
- Interactions of Wild and Hatchery Pink Salmon in Prince William Sound Report for 2020 (PDF 18,820 kB)
- Hatchery-Wild Interactions Study: Sitka Sound Science Center 2020 Field Summary (PDF 906 kB)
This was the last year of sampling in Prince William Sound.
- Interactions of Wild and Hatchery Pink Salmon in Prince William Sound Report for 2019 (PDF 4,657 kB)
- Hatchery-Wild Interactions Study 2019 Field Season Summary (PDF 612 kB)
- Hatchery-Wild Interactions Study 2018 Field Season Summary (PDF 1,346 kB)
- Interaction of Wild and Hatchery Pink Salmon in Prince William Sound, Final Report for 2018 (PDF 6,502 kB)
- Interaction of Wild and Hatchery Pink Salmon in Prince William Sound, Final Report for 2017 (PDF 4,041 kB)
- Interactions of Wild and Hatchery Chum Salmon in Southeast Alaska, 2017 Field Season Summary (PDF 217 kB)
No sampling occurred in Southeast Alaska.
- Interaction of Wild and Hatchery Pink Salmon in Prince William Sound, Annual Report 2016 (PDF 3,578 kB)
- Interaction of Wild and Hatchery Pink and Chum Salmon in Prince William Sound and Southeast Alaska, Annual Report 2015 (PDF 11,416 kB) - Full Report with Appendices
- Interaction of Wild and Hatchery Pink and Chum Salmon in Prince William Sound and Southeast Alaska, Annual Report 2014 (PDF 1,618 kB)
- Interaction of Wild and Hatchery Pink and Chum Salmon in Prince William Sound and Southeast Alaska, Annual Report 2013 (PDF 1,345 kB)
Technical documents (Tech Docs) are produced by ADF&G Gene Conservation Lab (GCL), Mark Tag and Age Lab (MTA) and the Cordova Otolith Lab to describe and document procedures and protocols utilized to process samples and data for the Alaska Hatchery Research Project. Tech Docs are also utilized to document decision points throughout the project. As Tech Docs are finalized they will be posted here.
- Defining Relative Reproductive Success: Which Fish Count (PDF 591 kB)
- Parentage SNP Selection - SEAK Chum (PDF 503 kB)
- Evaluation of Tissue Quality for Pedigree Samples Collected in 2013 (PDF 563 kB)
- Effect of Sampling Proportion on Parentage Assignment (PDF 331 kB)
- Advanced Parentage Simulations: the Statistical Power to Measure Relative Reproductive Success (PDF 2,948 kB)
- AHRP Technical Meeting Dec 16 2014 Minutes (PDF 238 kB)
- Thermal Mark Recovery Procedures of the ADF&G Mark, Tag and Age Laboratory (PDF 1,150 kB)
- Thermal Mark Recovery Data Quality Assurance and Quality Control Procedures, ADF&G Mark, Tag and Age Laboratory (PDF 678 kB)
- Region 1 Scale Aging Laboratory - Data Flow and Scale Aging Procedures (PDF 319 kB)
- AHRP Data Flow (PDF 402 kB)
- Prioritization of Pink Salmon Samples and Analyses 2015/2016 (PDF 356 kB)
- Otolith Processing and Quality Control Methods, ADF&G Cordova Otolith Laboratory (PDF 325 kB)
- Experimental Design of Pink Salmon SNP Discovery (PDF 480 kB)
- Population Genetic Structure of Odd-Year Pink Salmon from Prince William Sound, 2013 (PDF 1,646 kB)
The long-term research project proposed here has the potential to answer some of the questions most relevant to the Alaska salmon enhancement program. As good stewards of wild salmon stocks and the natural resources of the state, ADF&G believes strongly this work should be undertaken. It recognizes that the results will likely have some ambiguity and may even be interpreted differently by some groups. Nonetheless, this information will likely guide future decisions and will greatly advance the understanding of the ecological and evolutionary dynamics of wild and hatchery interactions.
- Knudsen, E. E., Rand, P. S., Gorman, K. B., Bernard, D. R., and W. D. Templin. 2021. Hatchery-Origin Stray Rates and Total Run Characteristics for Pink Salmon and Chum Salmon Returning to Prince William Sound, Alaska, in 2013–2015. Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 13:41–68.
- Josephson, R., Wertheimer, A., Gaudet, D., Knudsen, E. E., Adams, B., Bernard, D. R., Heinl, S. C., Piston, A. W., and W. D. Templin. 2021. Proportions of hatchery fish in escapements of summer-run Chum Salmon in Southeast Alaska, 2013–2015. Accepted Article (online access). North American Journal of Fisheries Management.