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
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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 |