Les populations de ce bivalve ont significativement diminué au cours des dernières décennies à cause d’une récolte incontrôlée, de la pêche au chalut, et de la destruction par les ancres des bateaux. La densité des populations peut varier entre 1 et 10 individus♱00m-2 et quelquefois plus. Cette espèce endémique de la Méditerranée vit partiellement enterrée dans les substrats meubles où elle se fixe par son byssus.
#Oyster spat collection methods plus#
La grande nacre (Pinna nobilis Linnaeus, 1758) est un bivalve filtreur qui peut atteindre plus d'un mètre de longueur. edulis restoration efforts in Europe is provided and underlines the general significance in the field. NORA also aims toĬombine the outreach activities of local projects for improved community support and awareness and to provide educational material to increase knowledge of the key ecological role of this species and increase awareness among regulators, permit providers and stakeholders. It will help guide the development of the field by developing and applying best practice accordingly. NORA members agreed on a set of joint recommendations and strongly advise that any restoration measure should respect and apply these recommendations: The Berlin Oyster Recommendation is presented here. North Sea and other European seas along with the associated ecosystem services services such as enhancing biodiversity, including enhanced fish stocks, nutrient cycling and sediment stabilization. The main motivation behind NORA is to facilitate the restoration of native oyster habitat within its historic biogeographic range in the It also focuses on joint funding opportunities and the potential development of national and international regulatory frameworks. The NORA network will enhance scientific and practical progress in flat oyster restoration, such as in project planning and permitting, seed oyster production, disease management and monitoring.
Restoration Alliance (NORA) was formed by partners from science, technology, nature conservation, consultancies, commercial producers and policy-makers. For the development of best practice recommendations and to promote multidimensional knowledge and technology exchange, the Native Oyster Restoration activities in a sustainable and constructive approach. To maximize the success of these, it is crucial to draw on existing knowledge and experience in order to design, plan and implement Several projects are currently running or being planned. edulis spat collectors intended for reef restoration purposes but may need further development for cultivation application.Įfforts to restore the native oyster Ostrea edulis and its associated habitats are gaining momentum across Europe. Suspended sacks of bivalve shells show great promise as O. In general, most spat were observed on collectors deployed 1–2 weeks after the peak in larval abundance was detected.įouling was heavy and may have prevented larval settlement on collectors deployed too early. The most successful spat collectors were sacks of bivalve shells. edulis and the non‐indigenous Pacific oyster (Crassostrea gigas) varied between locations and years. Larval abundance, and timing of peaks in abundance for both O. These different types included Chinese hats, Vexar mesh, PVC tubes, and four types of bivalve shells. The results of four different experiments investigating larval abundance, and the use of seven different types of suspended spat collectors in seven locations in the SW Netherlands were compared. Efficient spat collection is essential to both the successful restoration and cultivation of the European flat oyster (Ostrea edulis).