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Metadata: North East Coast Net Grid Trials 2013/14 - Fisheries Science Partnership
Abstract:
The twin rig trawler Aquarius II was chartered for ten days in September and October 2013 to undertake fishing trials in the Nephrops (*Nephrops norvegicus*) fishery off the North east coast of England. The aim of the work was to significantly reduce cod catches in this fishery through collective action with local fishing skippers. The practical approach taken was to insert a design concept under development known as the Net Grid into a trawl and to evidence changes in selectivity towards cod and other commercial species under normal fishing conditions. The objective of the work was to further develop this design with the aim of developing a trawl that reduces catches of cod in the English NE Nephrops trawl fishery without losing the target species of Nephrops.
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
Other details | ||
Internal code | Internally assigned metadata identifier | 9310 |
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. | North East Coast Net Grid Trials 2013/14 - Fisheries Science Partnership |
Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | FSP North East Coast Net Grid 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. | CEFAS102594ff-0257-47dd-b4d7-1ad5f5d319b0 |
Resource Identifier | This is the code assigned by the data owner. | CEFAS3592 |
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 | 2013-09-23 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2013-10-18 |
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 twin rig trawler Aquarius II was chartered for ten days in September and October 2013 to undertake fishing trials in the Nephrops (*Nephrops norvegicus*) fishery off the North east coast of England. The aim of the work was to significantly reduce cod catches in this fishery through collective action with local fishing skippers. The practical approach taken was to insert a design concept under development known as the Net Grid into a trawl and to evidence changes in selectivity towards cod and other commercial species under normal fishing conditions. The objective of the work was to further develop this design with the aim of developing a trawl that reduces catches of cod in the English NE Nephrops trawl fishery without losing the target species of Nephrops. |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | The vessel’s own commercial trawls were used for the trial. With the exception of the experimental modification, both trawls were of identical construction; the trawls had a 400 mesh x 80 mm fishing circle, with ground gear of 37m constructed from 15cm and 22cm rubber discs. The starboard trawl was altered by including the Net Grid modification which had a 200mm square mesh panel; the other was left in its standard commercial configuration with a 90mm square mesh panel to provide a direct comparison. The trawls complied with existing technical regulations and for the purpose of these trials were fitted with new, identical 85 mm cod ends. The trawls were towed simultaneously as a twin rig, using a 3-warp towing system with a 450 kg clump centre weight and spread using ThyborØn® 55 doors. Two versions of the Net Grid were tested. The "long" version (Version 1) was operated for 14 tows and the "short" version (Version 2) for 10.Tows of 3-5 hours duration, i.e. typical of normal commercial practice, were conducted in the Farne Deeps fishing grounds off the North East coast of England. Towing speed was on average between 2.0 and 2.7 knots. The area of the main Nephrops fishing grounds within the Farne Deeps is classed as Functional Unit 6 (FU6) in the North Sea Nephrops stock assessment and is very small and highly localised. All fishing took place in the statistical rectangles 38E9 and 39E9 in ICES area IVb, bottom depths ranged between 55 and 101 m. Fishing took place during daylight and darkness, however because Nephrops catches were negligible during darkness, priority was placed on achieving daylight tows. Version 1 of the Net Grid was operated from 23rd till the 26th of September and resumed on the 8th of October after a spell of South-easterly gales, till a period of Northerly gales interrupted trials after the 9th. Version 2 was operated in one continuous period between the 15th and 18th of October. |
Related keywords | ||
Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Crustacean |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Shellfish | |
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 | Analysis | |
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 | Monitoring | |
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 | Shellfish abundance and biomass in water bodies | |
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 | Benthic boundary | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network | |
Geographical coverage | ||
North | The northern-most limit of the data resource in decimal degrees | 55.25 |
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 | 54.5 |
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 | |
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 | |
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 | |
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 | |
Role | The owner is the person or organisation that owns the resource. | owner |
Organisation name | Department for Environment, Food and Rural Affairs (DEFRA) | |
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) | |
Resource locators | ||
Locator URL | Web address (URL) that links to the resource | https://data.cefas.co.uk/view/3592 |
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/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/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. | 2016-11-14 |
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. | 2015-12-15 |
Harvest date | The date which this record has been (re)harvested from the provider. | 2024-05-05 |
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 |