SAC Monitoring: Lamprey in the River Usk (2011)

Data gwaith monitro llysywod pendoll ar gyfer Afon Wysg 2011

River lamprey, brook lamprey, and sea lamprey are listed in Annex II of the EU Habitats Directive (Council Directive 92/43/EEC on the Conservation of Natural Habitats and of Wild Fauna and Flora). Six rivers in Wales, including the River Usk in South Wales, are designated as Special Areas of Conservation (SACs) for lamprey species.

The Countryside Council for Wales, and now Natural Resources Wales, is responsible for monitoring the condition of lamprey populations within SACs and ensuring the maintenance of favourable conservation status at designated sites.

The main aim of this project was to undertake a condition assessment of the population attribute for the brook lamprey, river lamprey, and sea lamprey SAC features of the River Usk SAC during the second Habitats Directive reporting cycle (2007-2012).

A total of 35 survey sites were selected throughout the Usk catchment. Only a small number of sites contained optimal habitat, with sub-optimal habitats predominating across the catchment. Sampling was carried out between 10 October and 16 November 2011.

The data are used to assess the population attribute of all three lamprey species. The results of the four attributes outlined in the Common Standards Monitoring (CSM) Guidance for Freshwater Fauna provide an indication of the overall condition of the lamprey populations and contribute to the overall condition assessment.

Dynodydd Identifier: NRW_DS115168

Teitl Amgen Alternative Title

Lamprey Monitoring, River Usk 2011 - CCW – Science Report No. 11/8/6 CCW000800000000M
River Usk Population Attribute Condition Assessment for Brook, River and Sea Lamprey 2011

Laith Metadata Metadata Language: English

Lineage: Similar work was previously undertaken in 2004/2005. Fieldwork was conducted by Environment Agency staff using standard electrofishing methodologies.

Condition assessments were carried out using the JNCC Common Standards Monitoring (CSM) Guidance for Freshwater Fauna. 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 & Cowx, 2003).

Quantitative quadrat surveys were undertaken in both optimal (very silty) and sub-optimal (more rocky) habitats. Electrofishing techniques were used within 1 m² quadrats to encourage lamprey to emerge from the silt, rather than stunning and trapping them within the sediment.

Sampling of quadrats in optimal habitats was undertaken three times, whereas quadrats in sub-optimal habitats were sampled once only. The original dataset contains both positive and negative samples.

Additional Information: (Ffynnon DCT-12-523868) River Usk Population Attribute Condition Assessment for Brook, River and Sea Lamprey 2011. CCW Staff Science Report No. 11/8/6 CCW. Bangor.

Dyddiad cyfeirnod y set ddata (Cyhoeddiad) Dataset Reference Date (Publication): 2012-11-30

Temporal Extent

Begin date: 2011-10-10

End date: 2011-11-16

Categori pwnc Topic category

Biota

Biota

Perchennog

Owner

Natural Resources Wales (NRW) -

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Cychwynnwr

Originator

Environment Agency Wales (EA Wales) -

Cambria House, 29 Newport Road, Cardiff, CF24 0TP, Wales

www.environment-agency.gov.uk

Extent

Hyd Geographic Extent: CASNEWYDD - NEWPORT

Hyd Geographic Extent: TOR-FAEN - TORFAEN

Hyd Geographic Extent: SIR FYNWY - MONMOUTHSHIRE

Hyd Geographic Extent: POWYS - POWYS

Map representing the geographic extent of the dataset

Dosbarthiad

Distribution

Fformat - Math a Disgrifiad Format Type and Description

Binary ( Unknown )

Specification

Raw data spreadsheet provided by the Environment Agency; Analysed/worked-up dataset created by Heather
Database ( Unknown )

Specification

Recorder 6 species dataset (Lamprey Monitoring, River Usk 2011 - CCW – Science Report No. 11/8/6 CCW000800000000M)
Documents ( Unknown )

Specification

Report in Word and PDF format; Paper field notes
Geographic Information System ( Unknown )

Specification

GIS layers in MapInfo format
Image ( Unknown )

Specification

Report images, maps, and histograms; Field survey photos

Ansawdd Data

Data quality

Cwmpas Ansawdd Quality Scope: Dataset

Dataset

Cydymffurfiad 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: This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree: false

Lineage: Similar work was previously undertaken in 2004/2005. Fieldwork was conducted by Environment Agency staff using standard electrofishing methodologies.

Condition assessments were carried out using the JNCC Common Standards Monitoring (CSM) Guidance for Freshwater Fauna. 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 & Cowx, 2003).

Quantitative quadrat surveys were undertaken in both optimal (very silty) and sub-optimal (more rocky) habitats. Electrofishing techniques were used within 1 m² quadrats to encourage lamprey to emerge from the silt, rather than stunning and trapping them within the sediment.

Sampling of quadrats in optimal habitats was undertaken three times, whereas quadrats in sub-optimal habitats were sampled once only. The original dataset contains both positive and negative samples.

Allweddair

Keywords

GEMET - INSPIRE themes, version 1.0

Species distribution

Math Type: Theme

Theme

Dyfyniad

Citation

Dyddiad (Cyhoeddiad) Date (Publication): 2008-06-01

Code: geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair

Keywords

NRW Thesaurus

lampreys (river lamprey, brook lamprey and sea lamprey)
petromyzon marinus
lampetra planeri
Lampetra sp.
lampetra fluviatilis
brook lamprey
sea lamprey
river lamprey

Math Type: Theme

Theme

Dyfyniad

Citation

Dyddiad (Cyhoeddiad) Date (Publication): 2026-08-27

Code: geonetwork.thesaurus.local.theme.converted_nrw-keywords

Code: British National Grid (EPSG::27700)

Gwybodaeth Cynnwys

Content Information

Proffil CNC

NRW Profile

Elfennau CNC

Custom Elements

NRW Related Title: River usk population attribute condition assessment for brook, river and sea lamprey 2011

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad Restriction type: Other restrictions

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

Cyfyngiadau Defnyddio Use constraints type: Other restrictions

Other restrictions

Other constraints: © CNC/NRW 2011 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. 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 CCW'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

Licence

Other constraints: Open Government Licence

Metadata

Dynodydd Ffeil File Identifier: 4f4c4942-4343-5764-6473-313135313638 XML

Laith Metadata Metadata Language: English

Parent Identifier: Condition monitoring of Special Areas of Conservation (SACs) in Wales
NRW_DS110194

Math o adnodd Resource type: Dataset

Dataset

Dyddiad Metadata Metadata Date: 2026-10-01T14:05:33.709Z

Enw Safonol Metadata Metadata Standard Name: NRW

Fersiwn Metadata Metadata Standard Version: 1.0

Pwynt Cyswllt

pointOfContact

Master Reference Data Team -

Natural Resources Wales, Maes y Fynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW

http://naturalresourceswales.gov.uk/splash?orig=/

Publishing Body

Access the portal

Full access to the portal and metadata.

SAC Monitoring: Lamprey in the River Usk (2011)

Data gwaith monitro llysywod pendoll ar gyfer Afon Wysg 2011

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Gwybodaeth Cynnwys

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Constraints

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Constraints

Limitations on Public Access and Use

Access Constraints Directive

Access Constraints Text

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Attribution Statement

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Allweddair

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Allweddair

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Dyfyniad

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Proffil CNC

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Elfennau CNC

Custom Elements