096903f92e453b27aeb0f1555a46fed8 English dataset MEO Data lead Eastern Inshore Fisheries and Conservation Authority MEO Data Lead mail@eastern-ifca.gov.uk pointOfContact 2016-11-15 MEDIN Discovery metadata standard 2.3.8 urn:ogc:def:crs:EPSG::4326 2001-2014 Eastern Inshore Fisheries and Conservation Authority (Eastern IFCA) River Stour and Orwell cockle surveys 2015-04-07 publication 2015-04-07 creation 2015-04-07 revision EIFCASuffolkCockles Eastern IFCA (and its predeccesor, ESFJC) have conducted stock assessment surveys of cockle (Cerastoderma edule) every two years from 2001-2009 (excluding 2005), and then annually since 2009 along both the River Stour and River Orwell, Suffolk. The aim of the surveys has been to undertake a stock assessment of the cockles to identify any potential commerical stocks. MEO Data lead Eastern Inshore Fisheries and Conservation Authority MEO Data Lead mail@eastern-ifca.gov.uk originator MEO Data lead Eastern Inshore Fisheries and Conservation Authority MEO Data Lead mail@eastern-ifca.gov.uk custodian unknown Database Marine Environmental Data and Information Network NDGO0005 Species distribution GEMET - INSPIRE themes, version 1.0 2008-01-06 revision Habitats and biotopes INSPIRE THEMES 2011-02-16 creation Marine UNESCO 2003-01-01 creation Shellfish abundance and biomass in water bodies SeaDataNet P021 parameter discovery vocabulary 2009-11-16 revision Inshore activities a thesaurus 2011-09-01 publication Data is freely available for research or commercial use providing that the originators are acknowledged in any publications produced. Charts are not to be used for navigation. otherRestrictions There are no access restrictions. English biota Charting Progress 2 Sea Areas 2009-06-18 creation Southern North Sea ICES Rectangles 2009-05-01 creation 38E0 International Hydrographic Bureau, Limits of Oceans and Seas 1954-01-01 creation North Sea SeaDataNet vertical extent keywords 2010-01-01 revision infralittoral ICES Statistical Areas 2014-05-16 creation IVc 1.1852 1.2283 51.9440 51.9557 1.1594 1.2610 51.9943 52.0308 2015-04-07 2015-04-07 MEO Data lead Eastern Inshore Fisheries and Conservation Authority MEO Data Lead mail@eastern-ifca.gov.uk distributor http://www.eastern-ifca.gov.uk/ A link to the general host site dataset Samples were collected at regular intervals on a predetermined grid deployed from Kent and Essex IFCA vessel, RV Tamesis over high water. Forty-four stations are surveyed along the northern bank of the River Orwell between the Orwell Bridge and Levington Creek. Seventy-four stations were surveyed in the Holbrook bay area of the River Stour. Sample stations were spaced approx. 250m apart on the grid. Up to three samples were collected from each station using a 0.1m sq day grab, then the samples were washed over 3 millimetre (mm) washing table and any cockles found are placed in labelled bags. A qualitative description of the sediment type at each station is noted. Samples of cockles are measured to the nearest mm by length and width, are separated into size classes of less than 14mm, 14 mm, 15 mm, and greater than 16 mm width, and then separated into age classes. The cockles in each group were weighted to the nearest 0.01 gram. Cockle distribution and density maps were created in MapInfo GIS. The biomass of the cockles in each river was calculated by multiplying the mean weight of the samples by the area covered. The biomass of fishable stock was determined by the mean weight of the sample having reached a width of greater than 14 mm.