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Metadata: North Sea whiting 2006/07 - Fisheries Science Partnership
Abstract:
To investigate stomach contents of North Sea whiting to determine their diet, and any possible changes to that diet since the last large-scale stomach survey in 1991. The project will specifically address the potential problem of predation of whiting on cod, which, if frequent, may affect cod recovery.
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
Other details | ||
Internal code | Internally assigned metadata identifier | 11187 |
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 Sea whiting 2006/07 - 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 Sea whiting |
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. | CEFASf397b9fc-933a-418a-999a-72a93c2d3990 |
Resource Identifier | This is the code assigned by the data owner. | CEFAS626 |
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 | 2006-08-01 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2006-10-31 |
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'. | notPlanned |
Abstract | The abstract provides a clear and brief statement of the content of the resource. | To investigate stomach contents of North Sea whiting to determine their diet, and any possible changes to that diet since the last large-scale stomach survey in 1991. The project will specifically address the potential problem of predation of whiting on cod, which, if frequent, may affect cod recovery. |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | FV Nimrod BH-227 is a wooden trawler of overall length 16.5m. The vessel deployed an otter trawl similar to a Whitby jet trawl. This was used to fish over both soft and hard substrata as required in the survey. Two nets were used during the survey, one with an 80mm codend and the other fitted with a 40mm shrimp mesh liner. Both nets were fitted with 40’ (12.2m) of 14” (355mm) hoppers and were spread by a set of No.8 Bison trawl doors. The nets had a headline height of 14’ - 18’ (4.3 – 5.5m). The bridle length was 25 fathom (45.7m) splits and 10 fathom (18.3m) single. Fishing for the August survey was undertaken within British Fishery Limits in the North Sea between longitudes 2o W and 2° E, and bounded in the north by approx. 56.5° N and in the south by 53.5° N in ICES rectangles 36F0, 37E9, 37F0, 37F1,38E9, 38F0, 38F1, 39E8, 39E9, 39F0, 40E8, 40E9, 41E8 and 41E9. During the August survey, and in consultation with Cefas staff, an additional rectangle 38E8 was sampled once. This area was known to be a good fishing ground for whiting. For the October survey a change to the locations surveyed was made to include two hour-long hauls in ICES rectangle 38E8 and to exclude all hauls from 39F0. This change was based on whiting catches during the first survey, which were high in 38E8 and low in 39F0. Fishing was conducted in order to sample whiting representatively from the area of interest. 1. The sampling took the form of tows of 1h duration. Multiple short tows as opposed to fewer long tows are desirable for stomach content evaluation as the statistical power of the data analysis is improved. 2. Two 1h tows were undertaken within the ICES rectangle. 3. The start and end positions of the tow were decided by the skipper, as long as all other requirements detailed in section “Survey area” were met. Processing of catch and stomach sampling A length distribution was obtained by measuring a representative number of whiting from each haul. Normally this was the lengths of one basket of fish with a raising factor according to the number of baskets, but due to small catches in some hauls, all fish were measured. The catch of whiting was sorted into length categories 15 – 19cm, 20 – 24cm, 25 – 29cm, 30 – 34cm and 35+cm. Stomachs were opened and non-empty stomachs were placed into freezer bags and frozen for subsequent analysis in the laboratory. This continued until 10 fish from each size category were collected or until no fish remained in the appropriate size category. Any remaining whiting in the sub-samples were examined onboard and stomach contents were marked on a simple tick sheet. This allowed an initial idea of what was present in the stomachs of whiting as well as allowing a large number of samples to be processed. |
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 | 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 | |
Geographical coverage | ||
North | The northern-most limit of the data resource in decimal degrees | 56.75 |
East | The eastern-most limit of the data resource in decimal degrees | 2.5 |
South | The southern-most limit of the data resource in decimal degrees | 53 |
West | The western-most limit of the data resource in decimal degrees | -3.5 |
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 | |
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 | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
Role | The owner is the person or organisation that owns the resource. | owner |
Organisation name | Department for Environment, Food and Rural Affairs (DEFRA) | |
Resource locators | ||
Locator URL | Web address (URL) that links to the resource | https://data.cefas.co.uk/view/626 |
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. | 2014-12-05 |
Date of last revision | The most recent date that the resource was revised. | 2021-12-01 |
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. | 2024-04-14 |
Metadata date | The date when the content of this metadata record was last updated. | 2021-12-01 |
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 |