Aquaculture 2022

February 28 - March 4, 2022

San Diego, California

UGLIES FOR RESTORATION: KEY RESULTS AND LESSONS LEARNED USING ADULT OYSTERS ON REEF RESTORATION IN THE GREAT BAY ESTUARY, NEW HAMPSHIRE EXPANDED UNDER THE SOAR PROGRAM (SUPPORTING OYSTER AQUACULTURE AND RESTORATION)

Brianna Group*, Boze Hancock, Alix Laferriere

112 Bay Road

Newmarket, NH 03857

Brianna.group@tnc.org

 



Through a spatially explicit planning process and stakeholder engagement, The Nature Conservancy in New Hampshire identified stock enhancement of adult oysters from aquaculturists onto restored oyster reefs as a potential method of oyster restoration. In 2019, TNC performed a pilot study in NH where adult oysters “uglies” that could not go to market were purchased from oyster growers and deployed on a reef site in the Great Bay estuary to provide ecological benefit such as water filtration, reproduction, and the production of habitat. This study yielded a 71% survival rate with growth on a subset of oysters and recruitment of conspecifics. When the global pandemic hit in 2020, restaurants shut down and oyster growers lost their half-shell-market. This pilot study served as the backbone for the Supporting Oyster Aquaculture and Restoration (SOAR) program, a partnership between TNC and PEW and funded through a private foundation, where TNC across 7 states purchased 3.5 million oysters from local farms to deploy on restoration sites. SOAR provided an economic relief to the oyster aquaculture industry, supported jobs, and provided an ecological benefit to these coastal systems. In NH, 657,562 adult oysters were purchased from farms in NH and ME and deployed in 2020-2021 on 2 acres in the Great Bay Estuary. In fall of 2021, monitoring was performed through dive surveys and tonging to evaluate the survival of those oysters deployed and the natural recruitment on the 2020 site. This presentation will dive into the restoration process adopted by the SOAR program, monitoring results, and key lessons learned.