Use constraints: Data can be used freely given that the source is cited (following creative commons license CC-BY). The source should be cited as: “HELCOM HOLAS 3 Dataset (2023).

The dataset contains the location of shellfish mariculture sites downloaded from EMODnet in March 2022.

The database on EMODnet contains points representing shellfish farms or shellfish production areas (depending on available data) in the following countries: Denmark, France, Greece, Ireland, Italy, Netherlands, Norway, Slovenia, Spain and United Kingdom. The data was selected for Baltic countries only. Data from Denmark come from the official lists of registered aquaculture sites. Data is missing for Germany and Sweden. Except for Germany, the shellfish production remains limited in those MS. There is no production in other MS.

The farm type relies on a typology established by AND-International, based on available information on species grown or authorised. A relational table provides harmonised information about species grown or authorised using Eurostat nomenclature for the Species Group (Mussels; Oysters; Clams, cockles, arkshells; Scallops, pectens; Abalones, winkles, conchs; Sea-urchins and other echinoderms) and when available the species name (e.g. Blue mussels - Mytilus edulis).

Data from HOLAS 2 was used to complement the dataset ( https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/21efdecc-2fd7-4bfb-9832-68c995291bf7). HOLAS 2 data is indicated on the 'notes' attribute.