fed2fdfa272dc075ddfdcbe1cb57f09a English dataset Devon and Severn IFCA Devon and Severn Inshore Fisheries and Conservation Authority office@devonandsevernifca.gov.uk pointOfContact 2024-09-04 MEDIN Discovery metadata standard 2.3.8 urn:ogc:def:crs:EPSG::4326 Exe Estuary Cockle Stock Assessment 2010 to 2022 2023-03-31 publication 2010-10-31 creation 2022-11-30 revision DSIFCASD082017 Since 2012 Devon and Severn IFCA has carried out stock assessments on the public mussel beds on the Exe Estuary, south Devon. These surveys determine the area of each bed, the density of mussels, the percentage cover, and the estimated stock (in tonnes), and marketable stock (mussels greater than 50mm in length) for each bed, and are used to assess the condition of the bed and whether the bed could support a viable mussel fishery. The surveys were annual between 2010–2020 and every 2 years since. Devon and Severn IFCA Devon and Severn Inshore Fisheries and Conservation Authority office@devonandsevernifca.gov.uk originator Devon and Severn IFCA Devon and Severn Inshore Fisheries and Conservation Authority office@devonandsevernifca.gov.uk custodian annually Documents Marine Environmental Data and Information Network NDGO0005 Habitats and biotopes Species distribution GEMET - INSPIRE themes, version 1.0 2008-01-06 revision Shellfish abundance and biomass in water bodies Habitat extent SeaDataNet P021 parameter discovery vocabulary 2009-11-16 revision Bivalve molluscs Bivalves 2015-04-07 creation Full data available on request otherRestrictions Full data available on request English biota biota Charting Progress 2 Sea Areas 2009-06-18 creation Western Channel and Celtic Sea ICES Rectangles 2009-05-01 creation 30E6 International Hydrographic Bureau, Limits of Oceans and Seas 1954-01-01 creation English Channel SeaDataNet vertical extent keywords 2010-01-01 revision littoral -3.4836 -3.3782 50.6023 50.6796 2012-04-01 2022-11-30 Devon and Severn IFCA Devon and Severn Inshore Fisheries and Conservation Authority office@devonandsevernifca.gov.uk distributor http://www.devonandsevernifca.gov.uk Devon and Severn IFCA A link to the web service or dataset http://https://www.devonandsevernifca.gov.uk/Resource-library/H-Environment-and-Research A link to the general host site dataset Data is collected by Devon and Severn IFCA, during March or April each year. Transects are walked across each mussel bed using the Dutch Wand method of surveying, data on the extent of each bed was also used to create GIS layers of the area of the beds. Results are compared to those from previous years.