CEFAS6c93b8e9-1525-4500-85bb-eb9cc7586407 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 2023-10-31T10:24:12 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 West Central North Sea Plankton Survey - RV Corella 04/76 2013-11-28 publication 2023-10-31 revision 2013-06-25 creation CEFAS2518 https://data.cefas.co.uk Third in a series of 12 cruises in 1976 to investigate the distribution and abundance of planktonic fish eggs and larvae, zooplankton predators and competitors and phytoplankton. Plankton samples were collected at each site on a planned survey grid. This data consists of numbers of macroplankton from 9 of the samples collected from an area off the North East coast of England, along with associated positional data and volumes filtered. 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 Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) data.manager@cefas.co.uk owner notPlanned Microzooplankton Phytoplankton Zooplankton SeaDataNet P03 parameter discovery vocabulary 2011-03-25 revision Plankton Advice Analysis Management Monitoring GEMET, version 1.0 2008-06-01 publication 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 1000 English biota -2.00 4.00 52.50 56.50 1976-03-08 1976-03-19 Delimited Geographic Information System Unknown https://data.cefas.co.uk/view/2518 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 Sample collection: Agrid of stations were worked based on the ICES statistical rectangles over the area from north Norfolk to 56 ̊ N and to longitude 2 ̊ E. Sampling points were 18 nautical miles apart longitudinally and along latitude lines 15 nautical miles apart. In the centre of this grid, to the north of the River Humber and to the south of the River Tyne, intermediate sampling points 9 nautical miles apart were designated; this central part constituted the main priority plankton sampling grid. This survey grid was worked on twelve cruises between the end of January and the beginning of November. Seven cruises were planned for the first four months to sample cod and plaice spawnings, while the remainder, at approximately monthly intervals, were to sample summer- and autumn-spawning fish. The sampling gear used for the main surveys was the Lowestoft multipurpose plankton sampler. This sampler consists of a 30 inch (76 cm) diameter fibreglass tube enclosing a conical nylon filtering net, 185 cm long. The mesh of the net has an aperture of 270 µm and a porosity of 46%. Water enters the net via a hemispherical nose cone with an opening of 16 inches (40.6 cm) diameter giving a 7: 1 ratio of open area of net to sampler mouth opening. The main sampler net was used to collect fish eggs and larvae and other macroplankton (particle size > 300 µm) including edible crab larvae. Two accessory samplers were mounted on the body of the main sampler, each one made up of a 6 inch (15 cm) diameter PVC tube with a metal nose cone with a 2 inch (5.1 cm) aperture. Each accessory sampler contained a conical nylon filtering net, 147 cm long, of mesh aperture 35 µm and porosity 16% in one sampler, and 61 µm and 26% respectively in the other. These accessory samplers were used to collect the smaller zooplankton and large diatoms and dinoflagellates. An electromechanical flowmeter was fitted in the nose cone of the main sampler and standard mechanical flowmeters at the rear of each accessory sampler. An additional mechanical flowmeter was mounted on the outside of the main sampler, operating continuously in free stream. The sampler was operated over the stern of the vessel at a towing speed of *5 *knots. A Scripps depressor on a 30 cm strop was attached to the underside of the sampler immediately behind the nose cone. By paying out and hauling the cable at a constant speed, the sampler performed a shallow, oblique dive to within 2 m of the sea bed and back to the surface, thus providing an equivalent sample of each part of the water column. The samples collected at sea by the main net and by the two auxillary samplers were each washed carefully from the net into the collecting bag on the end of the net. The sample was then transferred to a glass storage jar, labelled and fixed by the addition of 40% sodium acetate buffered formalin, in the ratio one part fixative to nine parts sample plus seawater. Sample analysis: Whenever practicable, the whole main net sample was sorted for fish eggs and larvae. Sub-sampling was limited to those samples containing exceptionally large numbers of eggs or larvae. MEDIN 3.1.1