This project investigated the potential of restoring oyster reefs in the Noosa estuary. 14 reefs were constructed in 2017 from three pyramid-style stacks of three coir bags, each filled with oyster shell. 10 of the reefs were subsequently removed in February 2019 due to damage from boat strike. At the remaining reefs, the coir bags were degraded by 2020 and the shell material had spilled out, undermining oyster recruitment. However, despite these drawbacks, some oyster recruitment did occur at an average density of around 340 oysters/sqm. The largest oyster measured was 8.85cm. These results indicate that there is potential for successful oyster reef restoration at the site; however, more community engagement and clearer signage is needed to prevent boat strike, and stronger material should be used to prevent premature degradation.

Shellfish

Method: Substrate Provision

Shellfish species: Saccostrea glomerata

Hybrid structure: Consolidated Shell (Coir bag)

Hybrid structure height (m): 0.3

Hybrid structure width (m): 1.3