TY - DATA T1 - Data underlying the publication: Settlement success of European flat oyster (Ostrea edulis) on different types of hard substrate to support reef development in offshore wind farms. PY - 2024/02/05 AU - Remment ter Hofstede AU - Sterre Witte AU - M. (Mark) van Koningsveld AU - P. Kamermans AU - Linda Tonk UR - DO - 10.4121/01ea8119-b6c9-40d6-b8c7-85c47ed3c7db.v1 KW - flat oyster KW - settlement KW - hard substrates KW - reef restoration KW - infrastructure KW - offshore wind N2 - <p>Data collected to determine settlement success of flat oyster larvae on nine different types of hard substrate. </p><p>These substrate types include granite, sandstone, flint, conventional concrete, concrete with natural adhesives (ECOncrete), galvanized steel, biodegradable plastic (BESE), mussel shell, and clay roof tile. </p><p>The experiments took place at two different locations in Ireland, i.e. in an oyster spatting pond (controlled conditions; New Quay) and near a wild population of oysters (natural environment; Tralee Bay).</p><p>The substrates were contained in polyethylene baskets (diameter 15cm, height 40cm) with a 2x2cm mesh size. </p><p>Weight and volume of the content in each basket was determined prior to deployment. </p><p>At both locations, the substrate baskets (n=5 per substrate type) were suspended 20-30cm below the water surface, approximately 30cm apart. </p><p>The sequence of the substrate baskets was randomly assigned.</p><p>After retrieval of the substrate baskets, the substrates in each basket were weighed, biofouling was removed, and if necessary, the substrate was cleaned using filtered seawater. </p><p>Then, the total number of oyster spat on the substrate was counted. </p><p>In order to assess the initial settlement preference, the total number of spat included both living and dead spat, which was recorded separately. </p><p>In order to compare the spat densities on the different substrate types, the three-dimensional surface area of the different substrates was estimated using a combination of double wax dipping and 3D scanning. </p><p>To determine which substrate collected the highest numbers of spat, the total numbers of spat were compared between the two locations and between different substrate types. </p><p>Spat density was taken as an indicator for settlement preference, calculated by dividing total spat by the available settlement surface in cm2. </p><p>Spat survival was calculated as the fraction of living spat out of the total spat counted after retrieval, and also compared between locations and substrate types.</p><p>For further information see manuscript</p> ER -