CEFAS55c86b4e-8997-40c8-8bd7-07a322bde9c8 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 2026-04-16T12:18:14 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 Thames Inshore Survey data 2022 to 2024 2026-02-06 publication 2026-04-16 revision 2025-08-13 creation CEFAS22297 https://data.cefas.co.uk Thames inshore survey data collected comprises of: Distribution, size composition, and relative abundance of all fish, cephalopod, and shellfish species encountered; Abundance-at-age data for juvenile sole and plaice; Epibenthic bycatch taxa and shrimp catch volumes; Surface water temperature and salinity at each trawl station; Marine litter data and environmental samples (eDNA, water biogeochemistry). Consistent use of a light 2-m beam trawl, with stations and methods aligned to historic Young Fish Survey (YFS) protocols to ensure comparability of data across years. Sampling inshore locations for small and young fish, focusing on key commercial species such as juvenile sole and plaice, but also recording other fish, cephalopods, shellfish, and epibenthic bycatch taxa. Additional opportunistic marine oceanographic and environmental data collection using surface water samples and conductivity temperature and depth profiles from a SAIV sensor (CTD) and concerto RBR. 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 Department for Environment, Food and Rural Affairs (DEFRA) defra.helpline@defra.gov.uk owner notPlanned Fish abundance in water bodies Salinity of the water column SeaDataNet P02 parameter discovery vocabulary 2011-03-25 revision Benthos GEMET, version 1.0 2008-06-01 publication Species distribution Oceanographic geographical features Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Circalittoral 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 Publicly available data licensed under the Open Government Licence v3.0 ( `https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/`_ ) – Please note the applicable attribution statement is as follows: ‘includes Crown copyright, Cefas 2026' .. _`https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/`: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ English biota environment oceans 0.00 1.50 51.25 52.00 2022-09-06 2024-09-22 Binary Unknown https://data.cefas.co.uk/view/22297 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: Binary download. dataset INSPIRE Data Specification on Species Distribution – Technical Guidelines 2013-12-10 publication false See the referenced specification INSPIRE Data Specification on Oceanographic geographical features – Technical Guidelines 2013-12-10 publication false See the referenced specification INSPIRE Data Specification on Habitats and Biotopes – 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 These data comprise a recent (2022–2024) partial reinstatement of the YFS (`Young Fish Survey Data 1981 to 2010`_) with the addition of oceanographic and environmental data collection. The survey used commercial inshore vessels deployed at fixed (prime) stations, towing the 2-m beam trawl for a duration of 10-minutes. A SAIV mini CTD and RBR Concerto (RBR) sensor were deployed before or after fishing. Anthropogenic litter was retained for subsequent analysis from all trawls, apart from large and heavy items which were processed on board the vessel. Surface water collection for biogeochemical analysis and eDNA was conducted when required, determined by project sampling protocols All fish, cephalopods and shellfish caught were identified to species, or the highest taxonomic level and measured to 0.5 cm. Age samples and biological parameters were collected from sole and plaice catches, in accordance with length stratified targets, and used to produce age-compositions. All trawl catch related data were subsequently input into the Cefas Fishing Survey System (FSS) database (2022-2023) and the Scientific Fisheries Systems (SFS) in 2024. The 2024 benthic data are currently undergoing quality assurance and should be interpreted with particular care. .. _`young fish survey data 1981 to 2010`: https://data.cefas.co.uk/view/19682 MEDIN 3.1.1