Freshwater Gwyniad (Coregonus lavaretus) Species Survey Data
The gwyniad (Coregonus lavaretus) population of Llyn Tegid has been considered for a number of years to be threatened by deteriorating environmental conditions, especially those associated with eutrophication. This dataset contains species data from the results of projects established to carry out translocation, hydroacoustic surveys and measurement of environmental variables. This dataset comprises of a number of surveys entered into Recorder 6 which have been packaged for dissemination onto the NBN Atlas. The purpose of this survey work and collation was to develop a generic whitefish sampling protocol suitable for Llyn Tegid and to produce a condition assessment of the population. Data is collected in Llyn Tegid and Llyn Arenig Fawr. All hydroacoustic records are available for site centroid only. Gill netting results are recorded at the site of the cast where information was available.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS116344
- Alternative Title
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- Gwyniad Gill netting survey of Llyn Tegid 2003 - CCW Science Report 597 CCW000800000000E
- Gwyniad Hydroacoustic and Gill Netting Survey of Llyn Arenig Fawr 2012- CCW Science Report 1013 CCW000800000000I
- Gwyniad Hydroacoustic Survey 2003 - 2009 - CCW Science Report 903 - Countryside Coucil for Wales CCW000800000000C
- Gwyniad Hydroacoustic and Gill netting survey of Llyn Arenig Fawr 2009 - CCW Science Report 904 CCW000800000000D
- Llyn Arenig Fawr Hydroacoustic Gwyniad Surveys
- Arolygon Hydroacwstig a Thrawsleoli Gwyniaid Llyn Tegid
- Metadata Language
- English
- Lineage
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Hydroacoustic surveys are carried out to detect fish populations. Gill nettings provides information on actual fish species and allows ground-truthing and estimates of the Gwyniad population to be made.
- Additional Information
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For further information see the survey metadata and reports: - 101834 Llyn Tegid Hydroacoustic Surveys and Gwyniad Translocations 2004-2009 - 115217 Llyn Tegid and Llyn Arenig Fawr hydroacoustic and Gwyniad surveys 2012 - 115048 Llyn Tegid Hydroacoustic Surveys and Gwyniad Translocation 2003
- Dataset Reference Date (Publication)
- 2016-08-17
Temporal Extent
- Begin date
- 2003-07-02
- End date
- 2012-08-07
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- Wales (WLS)
- Geographic Extent
- GWYNEDD - GWYNEDD
))
Vertical Extent
- Medin Extent Keyword
Distribution
Distribution
- Format Type and Description
-
-
Database
Database
()
- Specification
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[A] Species data is held in Recorder 6. - Gwyniad Hydroacoustic and Gill netting survey of Llyn Arenig Fawr 2009 - CCW Science Report 904 CCW000800000000D - Gwyniad Hydroacoustic Survey 2003 - 2009 - CCW Science Report 903 - Countryside Council for Wales CCW000800000000C - Gwyniad Hydroacoustic and Gill Netting Survey of Llyn Arenig Fawr 2012- CCW Science Report 1013 CCW000800000000I - Gwyniad Gill netting survey of Llyn Tegid 2003 - CCW Science Report 597 CCW000800000000E [B] This dataset is also available to download on the NBN Gateway - See Resource Locator
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Database
Database
()
- Resource Locator
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View and Download Data
World Wide Web page
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
Hydroacoustic surveys are carried out to detect fish populations. Gill nettings provides information on actual fish species and allows ground-truthing and estimates of the Gwyniad population to be made.
Keywords
Keywords
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NRW Thesaurus
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- coregonus lavaretus
- gwyniad (freshwater whitefish)
- hydroacoustic
- National Biodiversity Network [NBN]
- NBN Atlas
- Llyn Tegid
- Type
- Theme
Citation
- Date (Publication)
- 2024-04-09
Keywords
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NRW SMNR Keywords
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- Freshwater and Wetlands (SMNR)
- Sustainable Management of Natural Resources (SMNR)
- Ecosystem (SMNR)
- Management Areas (SMNR)
- Animals, Plants and Other Organisms (SMNR)
- Water Quality (SMNR)
- Natural Resources (Incl. Features and Processes) (SMNR)
- Type
- Theme
Citation
- Date (Publication)
- 2024-03-05
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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Gwyniad translocation project : Phase one : a condition assessment of the potential donor population in Llyn Tegid
- NRW Related Title
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Gwyniad translocation project 2004 - 05 : hydroacoustic survey of Llyn Tegid
- NRW Related Title
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Llyn Tegid hydroacoustic survey 2009
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
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There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© CNC/NRW 2008 There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313136333434 XML
- Metadata Language
- English
- Parent Identifier
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Natural Resources Wales (NRW) Species Data on the NBN Atlas
NRW_DS116805
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:38:51.137Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0