50585db2-2808-4b4c-8cc0-d747aec910b4 English series series 2026-07-17T15:31:10 MEDIN 3.1.2 biota Bird counts SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Bird behaviour SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Research The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Research and Development Activity The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Protected sites GEMET - INSPIRE themes, version 1.0 2009-07-31 revision Species distribution GEMET - INSPIRE themes, version 1.0 2009-07-31 revision SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision troposphere 2009-03-15T00:00:00 2009-03-29T00:00:00 -4.75 -4.24 51.549 51.773 TCE-275 Marine Data Exchange 2009, CREEM, COWRIE Research, Seabird abundance data and modelling Seabird abundance data and modelling 2007-01-01T00:00:00 creation 2021-05-17T13:34:00 publication English The report in this series describes design-based and model-based estimates of abundance for a group of seabirds who reside in large aggregations (scoters) and another group of seabirds that are less consistently clumped (‘gulls’) from three types of aerial surveys in Carmarthen Bay. Each type of survey was conducted on four dates during the month of March 2009 using different amounts of effort. This work explores patterns in estimates derived from different data collection and data analysis methods for both types of seabird groups. The work follows on from an examination of a portion of this data set conducted by Rexstad and Buckland (2009). Origin: BTO and DHI There will be no limitations when published on the Marine Data Exchange otherRestrictions Data Must be used in accordance to the Marine Data Exchange's Terms of Use: https://www.marinedataexchange.co.uk/content/info/terms-of-use otherRestrictions The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk custodian Centre for Research into Ecological and Environmental Modelling, University of St. Andrews 01334 461805 louise@mcs.st-and.ac.uk originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor COWRIE Ltd cowrie@offshorewind.co.uk owner notPlanned Documents https://www.marinedataexchange.co.uk/details/TCE-275/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08T00:00:00 publication Conformity with the Commission Regulation (EU) No 1089/2010 was either not relevant to this dataset or not a requirement of the Marine Data Exchange for the creation and submission of this dataset; therefore, conformity has not been assessed and cannot be declared False series This study examines data collected during March 2009 in the Carmarthen Bay Special Protection Area (SPA) by three aerial survey methods (visual, digital stills and digital video) using both design- and model-based methods of analysis on two different groups of birds, scoters and gulls. Scoters (primarily common, but perhaps with some velvet scoters included) are a highly aggregated species, and form large floating rafts of birds, particularly during winter. Although scoters were the group of primary interest, counts of other species were also made, and we also analysed data on gulls, the only other species group for which sample size was adequate. ABP Marine Environmental Research Ltd 02380711840 enquiries@abpmer.co.uk pointOfContact EPSG Geodetic Parameter Registry 2022-11-29 revision WGS 84