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Metadata: International Bottom Trawl Survey Jellyfish Data - North Sea - 2012 to 2023
Abstract:
The wet weight in grams of gelatinous zooplankton (jellyfish) caught at each station during International Bottom Trawl Surveys in the North Sea from 2012 to 2023. Also included are associated station data which include datetime, location, depths, swept volume and information on gear deployment. Any blank values indicate the value was not recorded.
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 10304 |
| 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. | International Bottom Trawl Survey Jellyfish Data - North Sea - 2012 to 2023 |
| 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. | CEFAS99d0084b-98a5-411e-a8d4-edafb4d64e67 |
| Resource Identifier | This is the code assigned by the data owner. | CEFAS19932 |
| 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 | 2012-08-07 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2023-08-31 |
| 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. | The wet weight in grams of gelatinous zooplankton (jellyfish) caught at each station during International Bottom Trawl Surveys in the North Sea from 2012 to 2023. Also included are associated station data which include datetime, location, depths, swept volume and information on gear deployment. Any blank values indicate the value was not recorded. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Jellyfish data was collected using standard GOV fishing gear deployed from Cefas RV Endeavour, to carry out the International Bottom Trawl Survey (IBTS) since 2012. Cefas is responsible for the Quarter 3 (Q3) survey which is recurring every August and covers the North Sea. The IBTS is a fishery dependent multi-species bottom trawl survey coordinated within ICES areas. These surveys aim to provide ICES assessment and science groups with consistent and standardized data for examining spatial and temporal changes in (a) the distribution and relative abundance of fish and fish assemblages; and (b) of the biological parameters of commercial fish species for stock assessment purposes. Full details of protocols are described in the official manual: `https://www.ices.dk/Science/publications/Documents/SISP/ICES%20Survey%20Protocol%20Guidelines.pdf`_ Following each fishing trawl described in the protocol, gelatinous zooplankton (commonly known as jellyfish) collected in the net were processed similarly to the fish. The rationale for the sampling of jellyfish is explained in Aubert et al. 2018 ( `https://doi.org/10.1016/j.marpol.2017.12.010`_), which also contains the official standard operating protocol to process the gelatinous zooplankton. Gelatinous zooplankton were separated according to species. The bulk of each species was weighted with individuals also weighted and measured. Unrecognisable specimen were categorised into a "non-identified" category. .. _`https://www.ices.dk/science/publications/documents/sisp/ices%20survey%20protocol%20guidelines.pdf`: https://www.ices.dk/Science/publications/Documents/SISP/ICES%20Survey%20Protocol%20Guidelines.pdf .. _`https://doi.org/10.1016/j.marpol.2017.12.010`: https://doi.org/10.1016/j.marpol.2017.12.010 |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Ecology |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Ecosystem | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Plankton | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fisheries | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Zooplankton | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Zooplankton wet weight biomass | |
| 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 | Water column | |
| 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 | 58 |
| East | The eastern-most limit of the data resource in decimal degrees | 9 |
| South | The southern-most limit of the data resource in decimal degrees | 51 |
| West | The western-most limit of the data resource in decimal degrees | -2 |
| 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 | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://data.cefas.co.uk/view/19932 |
| 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 | http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_RestrictionCode | |
| 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. | 2019-09-20 |
| Date of last revision | The most recent date that the resource was revised. | 2025-09-23 |
| Date of creation | The date that the resource was created. | 2019-07-11 |
| 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. | 2025-09-23 |
| 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 |