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Metadata: Fladen experimental fishing impact recovery data 2015 - 2m Beam Trawl
Abstract:
Total count and biomass in grams of taxa identified from 2m beam trawl samples of the seabed, with associated station information. Samples were collected using a 2m scientific beam trawl at sampling stations located within three experimental boxes (treatment boxes only) during a fishing impact recovery survey within the Fladen Grounds. Data were collected at three time points (before impact (time 0), immediately after impact (time 1) and 8 months after impact (time 2) during two research surveys on the RV Cefas Endeavour in April 2015 and November 2015.
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 9976 |
| 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. | Fladen experimental fishing impact recovery data 2015 - 2m Beam Trawl |
| 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. | CEFAS76d581e1-7522-4da7-8a46-347012ed721f |
| Resource Identifier | This is the code assigned by the data owner. | CEFAS19704 |
| 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 | 2015-04-21 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2015-12-03 |
| 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. | Total count and biomass in grams of taxa identified from 2m beam trawl samples of the seabed, with associated station information. Samples were collected using a 2m scientific beam trawl at sampling stations located within three experimental boxes (treatment boxes only) during a fishing impact recovery survey within the Fladen Grounds. Data were collected at three time points (before impact (time 0), immediately after impact (time 1) and 8 months after impact (time 2) during two research surveys on the RV Cefas Endeavour in April 2015 and November 2015. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Three 2m scientific beam trawls, spaced a minimum of 16m apart, were collected a North South orientation against the tide in Treatment boxes only. The 2m beam trawl is designed to sample epibenthic megafauna and is comprised of a heavy-duty steel beam, and a 4mm knotless mesh liner is used in the cod-end to retain smaller organisms. The chain mat, which is used to prevent the collection of large boulders, was removed to prevent the net from filling with the soft sediment. Tow distance was measured from the time that the beam trawl settled on the seabed to the time that hauling of the trawl began. The amount of wire paid out was 3x the water depth. Tow speed was maintained between 0.5 and 1.0 knots (speed over ground). A GIS navigation system was used throughout fishing operations to log the position of the tow every 10 seconds. On surfacing, the net was cleaned by gently towing it behind the vessel before landing the catch on-board. The net was inspected to ensure there were no signs of gear damage before the cod-end was emptied directly into large fish boxes. The contents of the fish boxes were washed on a benthos sorting table (5mm mesh) before being sorted on a sheet-steel table. The catch was sorted into taxon/species and the individual weight for all taxa were recorded for all specimens. Hermit crabs were weighed without shells and highly numerous species were sub-sampled. This involved measuring the individual weights of one quarter of the species total weight and then the whole catch was then calculated by ‘raising’ the number and weight in the known sub-sample volume. Taxa were identified using standard reference texts and a photographic reference collection was produced to aid rapid identification. |
| Related keywords | ||
| Keyword | 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 | Biota abundance, biomass and diversity | |
| 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 | Sediment | |
| 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 | 58.25 |
| East | The eastern-most limit of the data resource in decimal degrees | 0.5 |
| South | The southern-most limit of the data resource in decimal degrees | 58 |
| 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/19704 |
| 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. | 2019-03-28 |
| Date of last revision | The most recent date that the resource was revised. | 2024-07-12 |
| Date of creation | The date that the resource was created. | 2019-03-18 |
| 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. | 2024-07-12 |
| 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 |