Ghost Traps Get New Life as Oyster Reefs

In South Carolina, a novel approach is transforming hazardous abandoned crab traps into essential habitat for oyster restoration. These derelict traps, which continue to capture marine life in a phenomenon known as ghost fishing, are now being given a new purpose.

The initiative involves modifying the traps by sealing their vents and encasing them in concrete. This process not only prevents further ghost fishing but also creates a stable base for young oysters to settle and grow. This method is particularly effective in the state's tidal creeks, which often have soft, muddy bottoms unsuitable for traditional oyster reef development.

Supported by programs like NOAA and the Southeast Aquatic Resources Partnership (SARP), this project has deployed hundreds of modified traps since 2011. Studies, including a 2014 thesis by A. D. Kreutzer, have shown that these concrete-coated traps attract significantly more oysters than untreated ones, with some evidence suggesting the concrete mimics natural oyster cues.

These repurposed traps offer a viable alternative to costly crushed oyster shells, especially in challenging environments. Field observations and experiments, such as those conducted at Dawho Cut and Bears Bluff, have demonstrated high oyster recruitment and growth on these artificial reefs, validating their effectiveness in habitat restoration efforts along the coast.