On-Bottom Molluscan Shellfish Aquaculture

On-Bottom Molluscan Shellfish Aquaculture A. Any cultch materials used for molluscan shellfish aquaculture must be approved by the MDMR before use. All material must be Approved Cultch Material as defined in Chapter 02 of this Part. 1. Approval is based, in part, on the environmental suitability of the material. 2. Cultch materials placed in the grow-out area must be a suitable substrate for attachment of molluscan shellfish larvae. These include materials such as natural molluscan shells; fossilized shell; coral, and other aquatic organisms; lithic materials such as crushed and graded limestone, granite, and gravel which contain calcium carbonate or fossilized organisms; or recycled materials which contain lithic fractions and calcium carbonate, including crushed concrete. 3. Exceptions to this list of Approved Cultch Material must be specifically approved by the MDMR Authority.