Aquaculture 2025

March 6 - 10, 2025

New Orleans, Louisiana USA

Add To Calendar 10/03/2025 13:00:0010/03/2025 13:20:00America/ChicagoAquaculture 2025EVALUATING THE EFFICACY OF THE GREEN SEA URCHIN Strongylocentrotus drobachiensis TO MITIGATE BIOFOULING WHEN CO-CULTURED WITH ATLANTIC SEA SCALLOPS Placopecten magellanicusSalon BThe World Aquaculture Societyjohnc@was.orgfalseDD/MM/YYYYanrl65yqlzh3g1q0dme13067

EVALUATING THE EFFICACY OF THE GREEN SEA URCHIN Strongylocentrotus drobachiensis TO MITIGATE BIOFOULING WHEN CO-CULTURED WITH ATLANTIC SEA SCALLOPS Placopecten magellanicus

Brendan Elba*, Coleen Suckling

University of Rhode Island

9 East Alumni Avenue, Woodward Hall Room 17      
Kingston, RI 02881

Brendan_elba@uri.edu

 



The emerging sector of scallop aquaculture production, much like other shellfish sectors, experiences problematic biofouling on gear (e.g. lantern nets, on bottom cages), which can oculate gear mesh, restrict water flow and potentially reduce shellfish growth by 30% or more. Farmers need to commit a large amount of labor to removing this fouling to maximize shellfish growth, with many seeking solutions to alleviate this issue. One solution is to integrate sea urchins, whose grazing activity has been shown to reduce fouling on aquaculture gear by as much as 40-50%. Previous studies have used differing shellfish and sea urchin species combinations, but the integration of the Northeastern Green Sea urchin (GSU; Strongylocentrotus droebachiensis) with Atlantic Sea Scallops requires investigation. GSUs are also an emerging sector of aquaculture, in response to sustaining a declining fishing industry. Their grow out techniques and environmental tolerances are extremely compatible with scallops, meaning that integration of these species has strong potential. This study investigated this integration in collaboration with the scallop producing farm, Casco Bay Mooring (ME), by focusing on optimizing animal size and stocking densities when cultured in lantern nets towards reducing biofouling and effort and maximizing production. We will overview the promising results of this study and incorporate the farmer’s perspective on effort and labor reduction, and likelihood of uptake.