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Metadata: Bristol Channel 100mm codend trials 2010/11 - Fisheries Science Partnership
Abstract:
This work was carried out as part of the Fisheries Science Partnership (FSP), a Defra-funded collaborative programme of scientific research between the UK fishing industry and scientists. Local trawlermen working in the Bristol Channel in a mixed demersal fishery wanted to know whether an increase in codend mesh size would be effective in reducing the levels of discards, and whether its use would result in the loss of marketable fish.
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 8982 |
| 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. | Bristol Channel 100mm codend trials 2010/11 - Fisheries Science Partnership |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | FSP Bristol Channel 100mm codend trials |
| 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. | CEFAS02fafc97-688e-4315-83bb-7503317a550f |
| Resource Identifier | This is the code assigned by the data owner. | CEFAS643 |
| 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 | 2010-07-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2010-10-31 |
| 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'. | unknown |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | This work was carried out as part of the Fisheries Science Partnership (FSP), a Defra-funded collaborative programme of scientific research between the UK fishing industry and scientists. Local trawlermen working in the Bristol Channel in a mixed demersal fishery wanted to know whether an increase in codend mesh size would be effective in reducing the levels of discards, and whether its use would result in the loss of marketable fish. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | The gear used for the trials was a pair of twin-rig box trawls with 18 m footropes, rigged on 10 and 12 inch rockhoppers. The trawls were coupled to 15 fathom split bridles which in turn were attached to a short length of sweep (~5 fathoms). A set of A1, 6 foot otterboards were used to spread the trawls. New codends were used in the trial for both the 80 mm control codends and the 100 mm test codends. Both the test and control codends were constructed of 4 mm diameter polyethylene twine and were of a standard length of 100 meshes. To keep the cut-offs at the same length, the cut off rope was placed 30 meshes from the last round on the test codend and 36 meshes from the last round on the control codend. The mesh sizes of the codends were checked with the Omega net-measuring gauge. To account for seasonal variability in the catch, the fishing trials took place over a period of four months, between July and October 2010. Four trips of 1.5–3 days each were conducted. The trials followed the vessel’s normal fishing pattern and were carried out in both daylight and darkness. Haul duration was kept at 4 h where possible, to simulate normal fishing patterns. Hauls were conducted off the North Devon coast, including Bideford Bay, West of Lundy, and in the North and South Bristol Channel. The 80 mm and 100 mm codends were fished simultaneously side-by-side on the twin-rig trawls. Cefas scientific staff measured the lengths of all the fish caught in each haul, with the catch from each codend measured separately. The crew sorted the catch as they would normally do, and the retained fraction and discard fraction were sampled separately. When catch volumes were high, a known fraction was measured (i.e. the catch was sub sampled) and raised to provide an estimate for the haul. |
| Related keywords | ||
| Keyword | 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 | Fish | |
| 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 | 52 |
| East | The eastern-most limit of the data resource in decimal degrees | -2 |
| 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 | -5 |
| 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/643 |
| 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://www.nationalarchives.gov.uk/doc/open-government-licence/ | |
| 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. | 2015-10-22 |
| Date of last revision | The most recent date that the resource was revised. | 2019-10-29 |
| Date of creation | The date that the resource was created. | 2012-10-24 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-12 |
| Metadata date | The date when the content of this metadata record was last updated. | 2019-10-29 |
| 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 |