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Metadata: Area VII Haddock Discard Eliminations using Technical Measures 2014/15 - Fisheries Science Partnership
Abstract:
Following experimental work carried out in 2013, a twin-rig trawler, the Ilfracombe-based Our Olivia Belle (BD 277), was chartered to undertake further trials of a modified demersal trawl in August 2014 to look at selectivity in a mixed demersal fishery off south-west Cornwall. The primary aim was to improve the selectivity of the trawl to reduce discards of unwanted haddock with the least possible impact on the wanted catches of haddock and other commercial species. This is important in view of the future implementation of the landings obligation and associated catch quotas for species such as haddock. Following discussions with several Newlyn-based trawler operators, the decision was taken to investigate the effect of inserting square-mesh panels (SQMP) of 155 mm mesh into the top panel of the lengthener of an otter trawl. A twin-rig trawl, deployed as for normal haddock fishing, was used to compare the catches of modified and standard trawl nets in a series of tows on the fishing grounds off SW Cornwall.
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 9893 |
| 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. | Area VII Haddock Discard Eliminations using Technical Measures 2014/15 - Fisheries Science Partnership |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | FSP Area VII Haddock Discard Eliminations using Technical Measures |
| 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. | CEFAS6bb15a3b-db2e-46f4-a49b-8126bc047a0f |
| Resource Identifier | This is the code assigned by the data owner. | CEFAS18420 |
| 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 | 2014-08-12 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2014-09-04 |
| 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. | Following experimental work carried out in 2013, a twin-rig trawler, the Ilfracombe-based Our Olivia Belle (BD 277), was chartered to undertake further trials of a modified demersal trawl in August 2014 to look at selectivity in a mixed demersal fishery off south-west Cornwall. The primary aim was to improve the selectivity of the trawl to reduce discards of unwanted haddock with the least possible impact on the wanted catches of haddock and other commercial species. This is important in view of the future implementation of the landings obligation and associated catch quotas for species such as haddock. Following discussions with several Newlyn-based trawler operators, the decision was taken to investigate the effect of inserting square-mesh panels (SQMP) of 155 mm mesh into the top panel of the lengthener of an otter trawl. A twin-rig trawl, deployed as for normal haddock fishing, was used to compare the catches of modified and standard trawl nets in a series of tows on the fishing grounds off SW Cornwall. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Tows were conducted across the grounds and during both day and night. Four experiments were conducted, comprising 10 – 12 tows each, to investigate the effect of different positions of the panels and numbers of panels fitted. The statutory SQMPs required by EU Regulation 737/2012 for normal commercial trips in sea areas VII f & g were retained in both nets for three of the four experiments, whilst the final experiment removed them from both nets. Regulation 737/2012 requires a minimum mesh size of 110mm for the SQMP in TR2 trawls, and the version used by Our Olivia Belle was 113 mm. |
| Related keywords | ||
| Keyword | 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 | Management | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Analysis | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Stock (biological) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Advice | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fishing by-catch | |
| 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 | 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 | 51 |
| East | The eastern-most limit of the data resource in decimal degrees | -1 |
| South | The southern-most limit of the data resource in decimal degrees | 47.5 |
| West | The western-most limit of the data resource in decimal degrees | -7 |
| 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/18420 |
| 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. | 2017-02-13 |
| Date of last revision | The most recent date that the resource was revised. | 2021-12-14 |
| Date of creation | The date that the resource was created. | 2017-02-13 |
| 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. | 2021-12-14 |
| 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 |