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The Greater North Sea English Quarter 3 Beam Trawl Groundfish Survey Monitoring and Assessment Data resource contains both biological and sampling information. There are two sampling areas a “Full” data set, this includes rectangles that have a poor temporal sampling record. The “SSA” or “Standard Survey Area” sampling area only contains rectangles that have consistent temporal sampling and meet the criteria set out in Moriarty et al, (2017). The “sampling information” contains all the technical information required to describe each individual haul. The “biological information” contains all of the biological information required to describe the species length and weight distributions in each haul. Biological information is further classified by “baseline” data. This data contains a mix of species, genus, and family classifications, with a tag to say if it required further assessment and “null” length values, with a tag to say a length frequency distribution needs to be assigned. The “k-NN” or “k” number of nearest neighbours data has reconciled all of the taxonomic data to the highest resolution possible, and assigned an appropriate length distribution to the sample in question. Product type: • This product is the Full Standard Monitoring Programme it is recommended that you use the Standard Survey Area - Standard Monitoring Programme for any OSPAR related analyses. • This product is the Standard Survey Area - Standard Monitoring Programme this is the recommended product for all analyses. • This product is the baseline/non-resolved biological information, this contains species and length classes that have not been resolved. We recommended use of the knn/resolved product for all analyses. • This product is the knn/resolved product which is recommended for all analyses. Additional information: This data can be freely downloaded according to the Scottish Government data policy.
Scottish Government (Marine Scotland)
no limitations to public access
Other details | ||
Internal code | Internally assigned metadata identifier | 6270 |
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. | Greater North Sea English Beam Trawl Quarter 3 Groundfish Survey Monitoring and Assessment Data Products |
Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | GNSEngBT3 |
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. | Marine_Scotland_FishDAC_1966 |
Resource Identifier | This is the code assigned by the data owner. | Marine_Scotland_FishDAC_1966 |
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 | 1990-01-01 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2016-12-31 |
Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 55000.00 |
Spatial resolution unit | This describes the unit of spatial resolution which for distance must be metres. | http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/uom/gmxUom.xml#m |
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'. | Not Planned |
Abstract | The abstract provides a clear and brief statement of the content of the resource. | The Greater North Sea English Quarter 3 Beam Trawl Groundfish Survey Monitoring and Assessment Data resource contains both biological and sampling information. There are two sampling areas a “Full” data set, this includes rectangles that have a poor temporal sampling record. The “SSA” or “Standard Survey Area” sampling area only contains rectangles that have consistent temporal sampling and meet the criteria set out in Moriarty et al, (2017). The “sampling information” contains all the technical information required to describe each individual haul. The “biological information” contains all of the biological information required to describe the species length and weight distributions in each haul. Biological information is further classified by “baseline” data. This data contains a mix of species, genus, and family classifications, with a tag to say if it required further assessment and “null” length values, with a tag to say a length frequency distribution needs to be assigned. The “k-NN” or “k” number of nearest neighbours data has reconciled all of the taxonomic data to the highest resolution possible, and assigned an appropriate length distribution to the sample in question. Product type: • This product is the Full Standard Monitoring Programme it is recommended that you use the Standard Survey Area - Standard Monitoring Programme for any OSPAR related analyses. • This product is the Standard Survey Area - Standard Monitoring Programme this is the recommended product for all analyses. • This product is the baseline/non-resolved biological information, this contains species and length classes that have not been resolved. We recommended use of the knn/resolved product for all analyses. • This product is the knn/resolved product which is recommended for all analyses. Additional information: This data can be freely downloaded according to the Scottish Government data policy. |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Data quality statement: This data product has undergone rigorous quality checking, as outlined in the supporting documentation (Moriarty et al, 2017; Greenstreet et al 2017). It is suitable for supporting OSPAR fish community assessments and additional indicator research and development. Data source: Data was sourced on the Database of Trawl Surveys (DATRAS) housed by ICES, this data is traditionally used for stock assessments and fish community studies by the ICES community and public users. The ICES data have to pass an extensive quality check. Collection methods: The data was collected by CEFAS during their North Sea Beam Trawl Survey (BTS) coordinated by the Beam Trawl Survey Working Group. Data processing methods: While DATRAS has an integrated quality check, it was necessary to do a more extensive quality check and estimate certain values when data was not originally collected. The processing methods are fully outlined in Moriarty et al (2017). Data Interoperability: Sampling Information Field -Unit- Description HaulID - - Unique haul identifier (SurveyAcronym/Ship/Year/HaulNo) (H) Survey-Acronym - - Unique survey identifier (SubregionCountryGearTypeQuarter: e.g. GNSNedBT3) Ship - - Unique vessel identifier (e.g. SCO3: Scotia III) GearType - - Unique gear type code (BT = Beam Trawl, OT = Otter Trawl) Gear - - Unique gear code (e.g. GOV = Grande Oerverture Verticale) YearShot - - Year that gear was shot MonthShot - - Month that gear was shot DayShot - - Day that gear was shot TimeShot -GMT- Time that gear was shot (in format HHMM) HaulDur(min) -Min- Duration of fishing operation ShootLat(decdeg) -Deg.- Latitude in decimal degrees of the haul shoot position ShootLong(decdeg) -Deg.- Longitude in decimal degrees of the haul shoot position ICESStSq - - ICES statistical rectangle where gear was shot SurvStratum - - Stratum tag for stratified surveys Depth(m) -m- Depth tag assigned to the haul Distance(km) -km- Tow distance (dH,TOW) WingSpread(m) -m- Mean distance between the wings during fishing operation(dH,WING) DoorSpread(m) -m- Mean distance between the doors during fishing operation (dH,DOOR) NetOpen(m) -m- Mean head-line height above seabed during fishing operation (dH,HEIGHT) WingSwptArea(sqkm) -km2 - Area of seabed swept by the net (AH,WING = dH,TOW x dH,WING) WingSwptVol_CorF - - Multiplier (1 / dH,HEIGHT): converts to ‘density by wing-swept volume DoorSwptArea_CorF - - Multiplier (dH,WING / dH,DOOR): converts to ‘density by door-swept area DoorSwptVol_CorF - - Multiplier (dH,WING / (dH,DOOR x dH,HEIGHT)): converts to ‘density by door-swept volume Biological Information There are two Biological Information data products, ‘BaseLine’ and ‘KNN’. In ‘Baseline’ the k-NN procedure has not been applied, so densities-at-length of species complexes (e.g. genus, family or order taxonomic resolution level identifications codes) have not been resolved to the complexes constituent species, densities of a species where length data are not provided have not been resolved to their constituent length categories, and destinies of species complexes have not been resolved to their constituent species and length categories. In ‘KNN’ the k-NN procedure has been applied to address these three type of problem. Consequently the ‘KNN’ data product will have more records that the ‘Baseline’ data product and some fields are not relevant to the ‘Baseline’ data product. The ‘KNN’ data product will have the following structure. Field -Unit- Description HaulID - - Unique haul identifier (SurveyAcronym/Ship/Year/HaulNo) (H) SpeciesSciName - - Unique species name for each species sampled across the NE Atlantic (S) FishLength(cm) -cm- Integer numbers indicating fish length to the ‘cm below’ (L) IndivFishWght(g) -g- Estimated weight of individual fish of specified species and length (WS,L) Number - - Total number of fish of specified species and length in the catch (NS,L,H) DensAbund(N_sqkm) -km-2- Abundance density estimate (Dnos,S,L,H = NS,L,H / AH,WING) DensBiom(kg_Sqkm) -kg km-2- Biomass density estimate (Dbiom,S,L,H = (NS,L,H x WS,L)/ AH,WING) The ‘BaseLine’ product will not include the fields IndivFishWght(g) and DensBiom(kg_Sqkm), and the field SpeciesSciName will simply be called SciName. The two fields are excluded because with uncertain species identities it would not be possible to consistently include data for the field IndivFishWght(g), and in addition with uncertainty regarding length category, estimation of appropriate reliable values for the field DensBiom(kg_Sqkm) would also not always be possible. The ‘BaseLine’ data product was included because of feedback from data providers and potential data users, who stated that they would prefer having access the “real” data, rather than rely on estimated values to fill in where information was missing. |
Related keywords | ||
Keyword | 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 | Environment | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fisheries and aquaculture | |
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 | Fisheries | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fish abundance in water bodies | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fish biomass in water bodies | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Biological diversity maintained | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine food webs are at normal abundace and diversity | |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Non-indigenous species do not adversly effect ecosystem | |
Geographical coverage | ||
North | The northern-most limit of the data resource in decimal degrees | 54 |
East | The eastern-most limit of the data resource in decimal degrees | 3 |
South | The southern-most limit of the data resource in decimal degrees | 48.5 |
West | The western-most limit of the data resource in decimal degrees | -3 |
Regional sea | 26E7 | |
27E7 | ||
28E7 | ||
29E7 | ||
30E7 | ||
26E8 | ||
27E8 | ||
28E8 | ||
29E8 | ||
30E8 | ||
27E9 | ||
28E9 | ||
29E9 | ||
30E9 | ||
28F0 | ||
29F0 | ||
30F0 | ||
35F0 | ||
36F0 | ||
28F1 | ||
29F1 | ||
30F1 | ||
31F1 | ||
32F1 | ||
33F1 | ||
34F1 | ||
35F1 | ||
31F2 | ||
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33F2 | ||
34F2 | ||
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 | Scottish Government (Marine Scotland) | |
Phone | +44 (0)300 244 4000 | |
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 | Scottish Government (Marine Scotland) | |
Phone | +44 (0)300 244 4000 | |
Delivery point | Mailpoint 11, Area 1B South, Victoria Quay | |
Postal code | EH6 6QQ | |
City | Edinburgh | |
Country | United Kingdom | |
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 | Scottish Government (Marine Scotland) | |
Phone | +44 (0)300 244 4000 | |
Delivery point | Mailpoint 11, Area 1B South, Victoria Quay | |
Postal code | EH6 6QQ | |
City | Edinburgh | |
Country | United Kingdom | |
Role | The distributor is the person or organisation that distributes the resource. | distributor |
Organisation name | Scottish Government (Marine Scotland) | |
Phone | +44 (0)300 244 4000 | |
Delivery point | Mailpoint 11, Area 1B South, Victoria Quay | |
Postal code | EH6 6QQ | |
City | Edinburgh | |
Country | United Kingdom | |
Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
Organisation name | Centre for Environment Fisheries and Aquaculture (CEFAS) | |
Phone | +44 (0) 1502 562244 | |
Delivery point | Pakefield Road | |
City | Lowestoft | |
Country | United Kingdom | |
Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
Organisation name | Marine Scotland | |
Phone | +44 (0)300 244 4000 | |
Delivery point | 1B South, Victoria Quay | |
City | Edinburgh | |
Country | United Kingdom | |
Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
Organisation name | International Council for Exploration of the Sea (ICES) | |
Phone | +45 3338 6700 | |
Delivery point | H. C. Andersens Boulevard 44-46 | |
City | Copenhagen | |
Country | Denmark | |
Resource locators | ||
Locator URL | Web address (URL) that links to the resource | https://dx.doi.org/10.7489/1966-1 |
Locator function | Code that describes the function of the resource. ISO function code chosen from ISO 19115-1 Codelist | DOI:https://dx.doi.org/10.7489/1966-1 |
Dataset constraints | ||
20 Limitations on Public Access - Access constraints | ISO restriction code chosen from ISO 19115-1 Codelist | otherRestrictions |
20 Limitations on Public Access – Other constraints | Any restriction on the use of the resource such as the need to agree to certain licence conditions. | no limitations to public access |
21 Conditions for Access and Use - Use limitation | Any restrictions imposed on accessing the resource such as the need to agree to certain licence conditions. | Open Government License (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. | 2017-07-31 |
Metadata date | The date when the content of this metadata record was last updated. | 2017-07-13 |
Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery Metadata |
Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | Version 2.3.7 |
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