Title: Herring Research & Monitoring: Annual Herring Migration Cycle
Project Year and Number: 2019: 19170111-B
Other Fiscal Years and Numbers for this Project: None
Principal Investigator (PI): Mary Anne Bishop, Prince William Sound Science Center
Assisting Personnel: None
Restoration Category: Monitoring
Abstract: This project is a component of the Herring Research and Monitoring (HRM) program. The goal of the HRM program is to: Improve predictive models of herring stocks through observations and research. Within Prince William Sound (PWS), adult Pacific herring (Clupea pallasii) movements between spawning, summer feeding, and overwintering areas are not well understood. Addressing this knowledge gap will improve our ability to assess biomass trends and recovery of this ecologically important species. In 2013, we documented post-spawn migration of herring from Port Gravina to the PWS entrances by acoustic tagging adult herring and collecting data from the Ocean Tracking Network acoustic arrays, which are located in the major entrances and passages connecting PWS with the Gulf of Alaska (GoA). However, the 2013 study could not establish if herring were seasonally leaving PWS and migrating into the GoA. With funding from EVOS in FY16, we improved our ability to detect movements between PWS and the GoA by deploying additional acoustic receivers at the Ocean Tracking Network arrays. The primary goal of this 2017-2021 project is to clarify the annual migration cycle of PWS adult herring by leveraging this expanded acoustic infrastructure. The specific objectives of this project are to 1) document location, timing, and direction of Pacific herring seasonal migrations between PWS and the GoA; 2) relate large-scale movements to year class and body condition of tagged individuals; and 3) determine seasonal residency time within PWS, at the entrances to PWS, and in the GoA. During spring 2017 we tagged 124 herring in northeast PWS at Port Gravina and detected 59 herring at entrances to the GoA. Nine fish were detected returning to the spawning grounds the following winter/spring. In April 2018, we tagged 202 herring at Port Gravina and at Hawkins Island (Canoe Pass). For FY19 we will tag a total of 210 herring on the spawning grounds.
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Proposal: View PDF (411 KB)
Funding Recommendations: View
Funding Detail For: 2019
Quarterly Project Tasks For: 2019
Annual Report: 2019: Due 03/01/2020
Final Report: Draft Final Report Due 4/15/20
Publications from this Project: None Available