Shellfish Stocks, Oystercatcher and Knot (bird) Modelling Data for the Dee Estuary, Traeth Lafan and the Burry Inlet and Three Rivers, Phase 1 (1993-2001) dataset https://portal.medin.org.uk/portal/start.php?tpc=007_NRW_DS109823 The Dee, Traeth Lafan and Burry Inlet are designated Special Protection Areas (SPAs) for nationally and internationally important populations of wintering wildfowl and waders. In order to set conservation objectives and assess the sites for Favourable Conservation Status, information is required on numbers of birds using the sites and the food supplies they require to survive the winter and attain adequate body condition for Spring Migration. The three SPAs also support economically important cockle fisheries that may affect oystercatchers directly, by removing some of the food available to them and, indirectly, by displacing them from the best cockle beds to less suitable feeding areas. This is phase 1 of the project that will assess and use existing data to run an Individual Behaviour-based Model (IBM) to answer key questions relating to target setting, condition monitoring and management of each of the three sites. There were two main objectives to the project. The first to assess the power of existing surveys to detect change in the cockle populations at each site and recommend possible improvements. The second objective was to determine how each site was used by the populations of oystercatchers that roosted there. The models can be used to establish the target baseline quality habitats in terms of invertebrate populations but also in terms of the ability of the site to support the bird populations for which it was designated and therefore establish parameters for longer term monitoring and to establish whether it is in favourable conservation status. 20030401