Pond-based production of oyster spat (Ostrea edulis)

Aim : Understanding how temperature affects the reproduction cycle of Flat oysters (Ostrea edulis) and development of protocol for pond production of oyster spat to ensure a reliable supply of high-quality oyster seed.
1) Mature oysters from Galway Bay, Ireland, were placed in land-based ponds for spawning. The amount of larvae in the ponds as well as the water temperature in the ponds were measured daily during the study. Daily temperature means in Galway Bay, Carton point New Quay, Ireland were extracted from online databasis for use in a temperature-maturation model. The data was collected during the summers 2019 to 2021 at Galway Bay, Ireland.
 2) Oyster broodstock were placed in land based tanks and allowed to spawn. Abiotic parameters (temperature, salinity/alkalinity, oxygene and pH) as well as biotic parameters (microalgal concentration and species composition, and oyster larval density), were monitored during the study. Data was collected during June 2021.The study was performed in Fiskebäckskil, on the Swedish west coast.