CEFAS8007f01d-145c-47ae-b2e8-9fc182423e22 English dataset Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk pointOfContact 2023-10-31T12:53:56 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 Triennial Mackerel Egg Surveys at the Shelf Edge - RV Cirolana 04/2001 2016-03-09 publication 2023-10-31 revision 2016-03-07 creation CEFAS3796 https://data.cefas.co.uk Abundance of ichthyoplankton in samples from dedicated plankton surveys by Cefas with positional and sample data. Surveys took place off the Western Coast of the UK and Ireland between 1986 and 2004. Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk originator Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk custodian Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk distributor Department for Environment, Food and Rural Affairs (DEFRA) defra.helpline@defra.gov.uk owner notPlanned Plankton Advice Analysis Management Monitoring GEMET, version 1.0 2008-06-01 publication Fish abundance in water bodies SeaDataNet P02 parameter discovery vocabulary 2011-03-25 revision Fisheries SeaDataNet P03 parameter discovery vocabulary 2011-03-25 revision Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Water column SeaVoX Vertical Co-ordinate Coverages 2010-05-18 revision Marine Environmental Data and Information Network MEDIN metadata record availability 2012-01-11 publication data.gov.uk MEDIN metadata record availability 2012-01-11 publication otherRestrictions noLimitations otherRestrictions Public data - no limitations to reuse English biota -13.00 -1.00 43.00 59.50 2001-04-26 2001-05-18 Delimited Geographic Information System Unknown https://data.cefas.co.uk/view/3796 Cefas Data Portal download The Cefas Data Portal contains metadata records and data sets available to download and connect to in support of our commitment to open science. Data is available in the following formats: CSV, ESRI Shapefile. The data can also be accessed via the WFS and WMS protocols. dataset INSPIRE Data Specification on Species Distribution – Technical Guidelines 2013-12-10 publication false See the referenced specification 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 2010-12-08 publication true See the referenced specification Series of cruises undertaken to contribute to the estimation of the spawning stock biomass of the western mackerel and horse mackerel stocks by plankton survey. The tri-ennial mackerel egg surveys were begun in 1977 to estimate the SSB of the western mackerel stock. Since 1986 the surveys have also been used to estimate the SSB of horse mackerel. Plankton sampling is undertaken to estimate the egg production and trawling is carried out to estimate the mean fecundity of the mature female fish. Various designs of Gulf VII type samplers have been used with various apertures of nosecones and 270 micron nets. Samplers are now standardised to the 53cm version, fitted with 20cm aperture nosecones. Analysis at Cefas involved separating all fish eggs and larvae from samples. Where possibe all eggs were identified. Eggs lacking identifiable features were measured. Where >100 eggs were found, sub-sampling was undertaken. Eggs which were unmeasured were apportioned across the size distribution of measured eggs. All mackerel and horse mackerel eggs were staged. **Associated Datasets: **WG MEGS (ICES Working Group on Mackerel eggs) egg measurement data. Cirolana 4 2001 - A Gulf III type plankton sampler, fitted with a 20cm aperture nosecone and 270μm micron mesh net was used during this survey. 150 plankton stations were completed, covering a large part of the ‘Western’ mackerel spawning area from 46º 45'N to 54º 15'N. Catches of plankton were heavy at times, particularly on the northern part of the grid, on the continental shelf where phytoplankton was abundant. Crude estimates of mackerel egg abundance were made at sea, which showed that highest egg densities appeared to be over deep water to the west of the shelf, particularly north of 51º N and south of 48º 30'N. MEDIN 3.1.1