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Metadata: Thames Inshore Survey data 2022 to 2024
Abstract:
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.
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 9701 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | Thames Inshore Survey data 2022 to 2024 |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | CEFAS55c86b4e-8997-40c8-8bd7-07a322bde9c8 |
| Resource Identifier | This is the code assigned by the data owner. | CEFAS22297 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2022-09-06 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2024-09-22 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | 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. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | 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 |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fish abundance in water bodies |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Salinity of the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Benthos | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Species distribution | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Oceanographic geographical features | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitats and biotopes | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Circalittoral | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | data.gov.uk | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 52 |
| East | The eastern-most limit of the data resource in decimal degrees | 1.5 |
| South | The southern-most limit of the data resource in decimal degrees | 51.25 |
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| data.manager@cefas.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Department for Environment, Food and Rural Affairs (DEFRA) | |
| defra.helpline@defra.gov.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://data.cefas.co.uk/view/22297 |
| Locator name | Name of the web resource | Cefas Data Portal |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | noLimitations | |
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ | |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2026-02-06 |
| Date of last revision | The most recent date that the resource was revised. | 2026-04-16 |
| Date of creation | The date that the resource was created. | 2025-08-13 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-04-16 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.1 |