Oysters

Oyster FARMS

Farms for Aquaculture Research & Monitoring of Shellfish

Mortalities of oysters reaching harvest size have been experienced by growers at some lease areas during late spring and summer. To begin to address these unexplainable mortalities, oyster production, along with basic but key water quality parameters, were monitored in 2020-21 at four farms in two lease areas. Results of this pilot study can be found here.

In 2023, a network of growers was formed across the state to increase the number of participating farms in a monitoring program providing greater replication and environmental gradients. Growers received equipment, sampling supplies, and guidance so information on water quality, oyster performance, and health could be obtained from farms in eight water bodies. Results can be found here (videopresentation-PDF file).

With NOAA funding, FARMS has now expanded to include oyster growers from Virginia to Texas. Here is what is happening during 2025-26:

  • Temperature, salinity, and dissolved oxygen are monitored inside oyster bags using In-situ Aquatroll 100 or HOBO MX801 dataloggers.
  • Growers are able to download data via a mobile app and Bluetooth.
  • Data from nine Florida water bodies are displayed via a dashboard and monthly graphs are achieved. 

Sentinel Oysters

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  • To observe performance of oysters from the same stock, triploid and half-sibling diploid oysters were distributed to growers in September. 
  • Growers use their own culture gear and management practices.
  • Growth and survival will be monitored over the “at risk” months in 2026. 

Health

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  • To evaluate oyster health, samples are sent to shellfish pathologists at Virginia Institute of Marine Sciences and NC State University.
  • Oysters are sampled in early spring and when a mortality event occurs.
  • Growers are provided with shipping kits.