Special Area of Conservation (SAC) Monitoring: Shad Egg Survey on the River Wye (2017)
The River Wye rises on Plynlimon in the Cambrian Mountains and flows in a generally south-easterly direction to enter the Severn Estuary at Chepstow. The river is designated as a Special Area of Conservation (SAC) under the Habitats Directive for several features, including salmon, lampreys and shads: Twaite (Alosa fallax) and Allis (Alosa alosa) shad. In Britain, significant populations of Twaite shad are known to spawn in the Rivers Severn, Wye, Usk and Tywi. The population of both species are threatened in Europe mainly due to obstructions to migration and water quality issues. The purpose of this data capture was to make an assessment of Conservation Status by conducting egg deposition surveys to assess spawning extent and compare these with results from previous datasets. Surveys carried out along the length of the Welsh portion of the River Wye from Builth Wells to Monmouth. The survey was conducted in May and June of 2013, 2015 & 2016.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS119125
- Alternative Title
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- Monitro Ardaloedd Cadwraeth Arbennig (ACA): Arolwg o Wyau Gwangod ar yr Afon Gwy (2017)
- Metadata Language
- English
- Lineage
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Data is collected according to Joint Nature Conservation Committee (JNCC) published guidance on Common Standards Monitoring for Freshwater Fauna (JNCC, 2015). The distribution of spawning shad within each river catchments are assessed using a kick sampling technique for eggs conducted in the spring.
- Additional Information
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Garrett, HM., (2017), River Wye SAC Allis & Twaite shad population condition assessment, Reporting cycle 2013 to 2018, 23 pp., Natural Resources Wales, Dolgellau. Unpub.
- Dataset Reference Date (Publication)
- 2017-06-30
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Distribution
- Format Type and Description
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Delimited
()
- Specification
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Microsoft Excel Table .XLSX format [Workbook Wye shad egg surveys 2013 onwards.xlsx]
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Delimited
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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Data is collected according to Joint Nature Conservation Committee (JNCC) published guidance on Common Standards Monitoring for Freshwater Fauna (JNCC, 2015). The distribution of spawning shad within each river catchments are assessed using a kick sampling technique for eggs conducted in the spring.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- protected areas
- allis shad
- alosa alosa
- twaite shad
- alosa fallax
- monitoring (see specific types of monitoring eg. woodland monitoring)
- freshwater (fresh water, open water) (see also freshwater ecology) (see also inland waters,rivers,lakes)
- Special Areas of Conservation (SAC) - SAC monitoring
- Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC)
- protected sites
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
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 to 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 Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313139313235 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-05-31T09:41:33.434Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0