SAC Monitoring: Shad Monitoring Data for Rivers Wye, Usk and Tywi (2006)
The purpose of this data capture was to monitor the Rivers Wye, Usk, and Tywi for the presence of shad. These rivers are designated as Special Areas of Conservation (SACs), partly because they support internationally important populations of twaite shad. Allis shad is also a feature of these sites and is a secondary reason for their selection as SACs. Records of other freshwater and estuarine fish species are also included within this dataset.
This dataset provides a collation of existing knowledge, habitat data, and shad records, and supplies evidence to support the design and implementation of a suitable juvenile monitoring programme for condition assessment. There were five survey sites along the River Usk, five along the River Wye, and five along the River Tywi.
Additional data are available in paper format within the associated report, including historical egg survey records dating back to 1980. These historical data were collated from the Environment Agency.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS107792
- Alternative Title
-
- Shad Monitoring, Usk, Wye & Tywi Catchments 2006 - CCW - Report no.40 CCW0002800000005
- Metadata Language
- English
- Lineage
-
The data were collated from a variety of sources, including Excel spreadsheets containing data collected in 2006, Recorder surveys uploaded in 2007, and spatially mapped sample locations. Juvenile shad seine netting was undertaken in September and October 2005 and again in July 2006, in accordance with the protocols described by Hillman et al. (2003). Each sample station was netted multiple times, and counts were recorded for each sampling event. All fish were measured, and a subsample was identified to species using gill raker counts. Confidence in this dataset is high, as the surveys were undertaken by experienced staff.
- Additional Information
-
Further information is available in Countryside Council for Wales Environmental Monitoring Report no.40.
- Dataset Reference Date (Publication)
- 2007-01-31
Temporal Extent
- Begin date
- 1980-01-01
- End date
- 2006-07-21
- Topic category
-
- Biota
Extent
Extent
- Geographic Extent
- England (ENG)
- Geographic Extent
- SIR FYNWY - MONMOUTHSHIRE
- Geographic Extent
- SIR GAERFYRDDIN - CARMARTHENSHIRE
))
Distribution
Distribution
- Format Type and Description
-
-
Delimited
(
Unknown
)
- Specification
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Species survey data and associated monitoring records held in Microsoft Excel spreadsheets.
-
Documents
(
Unknown
)
- Specification
-
Shad Monitoring, Usk, Wye and Tywi Catchments 2006 (CCW Report No. 40; Reference: CCW0002800000005).
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Database
(
Unknown
)
- Specification
-
Species records and sample locations held in Recorder 6.
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Delimited
(
Unknown
)
Quality
Data quality
- Quality Scope
- Dataset
- Conformity
- Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Explanation
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This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Degree
- false
- Lineage
-
The data were collated from a variety of sources, including Excel spreadsheets containing data collected in 2006, Recorder surveys uploaded in 2007, and spatially mapped sample locations. Juvenile shad seine netting was undertaken in September and October 2005 and again in July 2006, in accordance with the protocols described by Hillman et al. (2003). Each sample station was netted multiple times, and counts were recorded for each sampling event. All fish were measured, and a subsample was identified to species using gill raker counts. Confidence in this dataset is high, as the surveys were undertaken by experienced staff.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
-
NRW Thesaurus
-
- allis shad
- alosa fallax
- twaite shad
- bullhead
- herring
- esox lucius
- brown trout
- Special Areas of Conservation (SAC) - SAC monitoring
- cottus gobio
- bass
- alosa alosa
- european eel
- salmo trutta
- river Tywi (afon Tywi)
- dicentrarchus labrax
- pike
- salmo salar
- anguilla anguilla
- River Wye (Afon Gwy)
- Lampetra sp.
- clupea harengus
- River Usk
- Atlantic salmon
- Type
- Theme
Citation
- Date (Publication)
- 2026-08-27
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
-
Shad monitoring and assessment of conservation condition in the Wye, Usk and Tywi SACs
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
-
There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
-
© CNC/NRW 2006 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.
Attribution Statement
- Other constraints
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Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313037373932 XML
- Metadata Language
- English
- Parent Identifier
-
Freshwater Shad Monitoring Data
NRW_DS116346
- Resource type
- Dataset
- Metadata Date
- 2026-09-29T10:51:24.788Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0