SAC Monitoring: Lamprey Monitoring for the Rivers Tywi, Teifi and Cleddau (2004-2005)
River, brook, and sea lamprey are designated Annex II features of the River Tywi, River Teifi, and Cleddau Rivers Special Areas of Conservation (SACs). Assessments of the species composition, distribution, abundance, and size structure of these species within these river systems are of particular importance for condition assessment. The data were collected to support the assessment of the conservation status of lampreys within the Tywi, Teifi, and Cleddau SACs. Monitoring the status of lamprey populations is required to comply with the reporting requirements of the Habitats Directive.
A total of 112 sampling sites across the River Tywi, River Teifi, and the Eastern and Western Cleddau were surveyed, of which 77 contained positive records for either river lamprey or brook lamprey.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS107907
- Alternative Title
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- Lamprey Monitoring, Tywi, Teifi & Cleddau Catchments 2004 - CCW - RoC Report no. 7 CCW0002800000008
- Metadata Language
- English
- Lineage
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The sampling strategy for the monitoring programme for sea, river, and brook lamprey followed the protocols developed for the LIFE in UK Rivers project (Harvey and Cowx, 2003). Quantitative quadrat surveys were carried out in both optimal (very silty) and sub-optimal (more rocky) habitats. Electrofishing techniques were used within a 1 m² quadrat to draw lamprey from the silt rather than stunning and trapping them within it.
Sampling of optimal habitat quadrats was undertaken three times, whilst sub-optimal habitat quadrats were sampled once. The original dataset contains both positive and negative records.
- Dataset Reference Date (Publication)
- 2005-04-30
Temporal Extent
- Begin date
- 2004-11-01
- End date
- 2004-11-30
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- SIR CEREDIGION - CEREDIGION
- Geographic Extent
- SIR GAERFYRDDIN - CARMARTHENSHIRE
- Geographic Extent
- SIR BENFRO - PEMBROKESHIRE
))
Distribution
Distribution
- Format Type and Description
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Documents
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Unknown
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- Specification
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Final report held in Microsoft Word format.
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Delimited
(
Unknown
)
- Specification
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Raw survey data workbook held in Microsoft Excel format.
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Geographic Information System
(
Unknown
)
- Specification
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GIS layers used to produce the maps contained within the report, held in MapInfo TAB format.
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Image
(
Unknown
)
- Specification
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Survey photographs and associated images held in JPEG format.
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Database
(
Unknown
)
- Specification
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Species data held in Recorder 6 under reference CCW0002800000008: Lamprey Monitoring, Tywi, Teifi and Cleddau Catchments 2004, CCW RoC Report No. 7.
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Documents
(
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 sampling strategy for the monitoring programme for sea, river, and brook lamprey followed the protocols developed for the LIFE in UK Rivers project (Harvey and Cowx, 2003). Quantitative quadrat surveys were carried out in both optimal (very silty) and sub-optimal (more rocky) habitats. Electrofishing techniques were used within a 1 m² quadrat to draw lamprey from the silt rather than stunning and trapping them within it.
Sampling of optimal habitat quadrats was undertaken three times, whilst sub-optimal habitat quadrats were sampled once. The original dataset contains both positive and negative records.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
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NRW Thesaurus
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- petromyzon marinus
- Tywi estuary
- lampetra fluviatilis
- river lamprey
- lampetra planeri
- brook lamprey
- sea lamprey
- Cleddau estuary
- Special Area of Conservation Monitoring
- Teifi
- Lampetra sp.
- Type
- Theme
Citation
- Date (Publication)
- 2026-08-27
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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Lamprey survey on the rivers Tywi, Teifi and Cleddau
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 2004. 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.
Licence
- Other constraints
- Open Government Licence
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313037393037 XML
- Metadata Language
- English
- Parent Identifier
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Freshwater River lamprey (Lampetra fluviatilis), Brook lamprey (Lampetra planeri) and Sea lamprey (Petromyzon marinus) Survey Data
NRW_DS116345
- Resource type
- Dataset
- Metadata Date
- 2026-09-29T11:32:47.702Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0