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In North Carolina shellfish such as clams and oysters have been a staple in our diets for hundreds of years. Today traditional oyster roasts are still popular and there is a growing demand for shellfish in resteraunts across the east coast.
While wild shellfish have been harvested from the coastal waters of North Carolina for hundreds of years, they have also been culltivated. NC has allowed the use of public waters to commercially grow shellfish since 1858, given that the producer has obtained a lease to do so from the N.C. Division of Marine Fisheries Shellfish Lease Program.
In North Carolina commercial shellfish aquaculture is focased on the cultivation of oysters and clams. Typically, clam seeds are planted on the bottom of the lease in prepared plots and then covered and protected by a mesh covering. Oysters can be cultivated in the same way, by planting oyster shells on the bottom of the lease and then inroducing oyster larve. However many NC Oyster producers have started to grow their oysters in the water column.
This free flow system involves placing oyster seeds into either floating cages or cages suspended of the water bottom. While more labor intensive this second technique yiels consistently sized singular oysters free of grit.
Cultivated Shellfish have many benifites for both the producer and the enviroment around them. Becuase shellfish are filter feeders, when they are cultivated in coastal waters they recieve thier nutrients from the water flowing through the system and so require no additional food. Culltivated shellfish cannot be over harvested and relieve pressure on wild shellfish populations.
In 2016 the United States produced 36.6 million pounds of oysters (including Eastern oysters), valued at $192 million. In 2017, the commercial value of cultivated North Carolina oysters was nearly $2 million, while cultivated clams were valued at about $200,000. Matriculture in NC is expected to grow to $100 million, with a gate value of $33 million by 2030.
Additional resouces on Shellfish Production:
SRAC 7305: Eastern Oysters