https://doi.pangaea.de/10.1594/PANGAEA.997979Mackay-Roberts, Nicholas JamieNicholas JamieMackay-Roberts0000-0002-6387-8617Alfred Wegener Institute - Biological Institute HelgolandAraujo Piñeiro, NicolásNicolásAraujo Piñeiro0000-0001-5805-7606Thünen Institute of Fisheries EcologyPogoda, BernadetteBernadettePogoda0000-0003-3997-426XAlfred Wegener Institute for Polar and Marine Research, Bremerhaven (1986-2013)Colsoul, BérengerBérengerColsoul0000-0002-7891-8036Thünen Institute of Fisheries EcologyFreitas, PauloPauloFreitasAlfred Wegener Institute - Biological Institute HelgolandCarta, TizianoTizianoCartaAlfred Wegener Institute - Biological Institute HelgolandPANGAEA2026Multiple investigations2024-06-04T00:00:00/2025-08-13T00:00:00Bundled Publication of Datasets3 datasetsapplication/zipCreative Commons Attribution 4.0 InternationalThe dataset compiles recordings of the Helgoland Oyster Hatchery production seasons 2024 and 2025. European flat oyster spat-on-shell were produced in the Alfred Wegener Institute's hatchery (project PROCEED) to supply MPA management measures in Borkum Reefground and Sylt Outer Reef for oyster reef habitat restoration in the North Sea (project RESTORE). Data comprise daily logs tracking oyster broodstock, larval releases and rearing through the larval and settlement systems, environmental conditions, and phytoplankton feed concentrations. Spat-on-shell settlement and its average length before export are additionally present for production season 2025.7.8918059999999954.17758299999991HelgolandBundesamt für Naturschutzhttps://doi.org/10.13039/5011000104153516892001RESTORE I und II - Wiederherstellung der Bestände der Europäischen Auster (Ostrea edulis) in der deutschen NordseeFederal Ministry for the Environment, Nature Conservation, Nuclear Safety and Consumer Protectionhttps://doi.org/10.13039/5011000059103517685013Restoration of the European Oyster in the German North Sea: Establishment of a sustainable oyster seed production for a long-term restoration program (PROCEED)