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Project Information

Title: PWS Herring Program - Juvenile Herring Abundance Index

Project Year and Number: 2012: 12120111-F

Other Fiscal Years and Numbers for this Project: 2014: 14120111-F, 2013: 13120111-F

Principal Investigator (PI): Michele Buckhorn

Assisting Personnel: Dick Thorne

Research Location: Prince William Sound

Restoration Category: Research

Injured Resources Addressed: Not Specified

Abstract: Management of the Pacific herring stock in Prince William Sound (PWS), Alaska, is based primarily on an age-structured-assessment (ASA) model. The current model, developed in 2005, incorporates both hydroacoustic estimates of the adult herring biomass and an index of the male spawning, called the “mile-days of spawn”. Unfortunately, the forecast is based on measurements from the previous year and does not have a direct measure of future age 3 recruitment. Current knowledge suggests that most mortality occurs during the first winter of life, so the relative recruitment may be fixed by the end of the first year. Consequently, estimates of relative abundance of age 1 and age 2 fish should provide an index of future recruitment. An index of age 0 fish would also provide a forecast of recruitment if additional information were available on the magnitude of the first year mortality. We will conduct annual fall surveys (FY2013-2016) of 8 bays; four of which will be the Sound Ecosystem Assessment (SEA) bays (Cooney et al. 2001). This will maintain a continual database from these locations. The other 4 bays will be selected based upon the survey results of the current EVOSTC FY10 Herring Survey Project (# 10100132). Surveys will be conducted using 120 kHz split-beam hydroacoustic unit in a stratified systematic survey design (Adams et al. 2006). For this study, direct capture will be directed to size and species composition. A midwater trawl will be used to sample randomized transects within each strata.


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Proposal: View PDF (331 KB)

Funding Recommendations: View

Funding Detail For: 2012 , 2013 , 2014 , 2015 , 2016

Quarterly Project Tasks For: 2012 , 2013 , 2014 , 2015 , 2016

Annual Reports: 2012: View (1,139 KB) 2013: View (326 KB) 2014: View (769 KB) 2015: View (1,299 KB) 2016: Due 09/01/2016

Final Report: Final Report Not Available - For Current Status Please Contact Us

Publications from this Project: None Available

More information may be available for this project under other years:

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Project Number Proposal Annual Reports Final Report Data
2014: 14120111-F View (PDF) 2014: View (PDF)
Final Report Not Available - For Current Status Please Contact Us No datasets
2013: 13120111-F View (PDF) 2013: Due 09/01/2013
Final Report Not Available - For Current Status Please Contact Us No datasets