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.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS115168
- Teitl Amgen
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- 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
- English
- Datganiad
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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.
- Gwybodaeth ychwanegol
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(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)
- 2012-11-30
Ystod amser
- Dyddiad cychwyn
- 2011-10-10
- Dyddiad gorffen
- 2011-11-16
- Categori pwnc
-
- Biota
Rhychwant
Rhychwant
- Hyd
- CASNEWYDD - NEWPORT
- Hyd
- TOR-FAEN - TORFAEN
- Hyd
- SIR FYNWY - MONMOUTHSHIRE
- Hyd
- POWYS - POWYS
))
Dosbarthiad
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Binary
(
Unknown
)
- Math
-
Raw data spreadsheet provided by the Environment Agency; Analysed/worked-up dataset created by Heather
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Database
(
Unknown
)
- Math
-
Recorder 6 species dataset (Lamprey Monitoring, River Usk 2011 - CCW – Science Report No. 11/8/6 CCW000800000000M)
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Documents
(
Unknown
)
- Math
-
Report in Word and PDF format; Paper field notes
-
Geographic Information System
(
Unknown
)
- Math
-
GIS layers in MapInfo format
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Image
(
Unknown
)
- Math
-
Report images, maps, and histograms; Field survey photos
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Binary
(
Unknown
)
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Cydymffurfiad
- 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
- Eglurhad
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This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
- Gradd
- false
- Datganiad
-
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.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
-
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
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2026-08-27
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
- Teitlau cysylltiedig CNC
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River usk population attribute condition assessment for brook, river and sea lamprey 2011
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Cyfarwyddeb Cyfyngiadau Mynediad
- Cyfyngiadau
- no limitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
-
There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
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© 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.
Datganiad Priodoli
- Cyfyngiadau eraill
-
Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
Math o Drwydded
- Cyfyngiadau eraill
- Open Government Licence
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313135313638 XML
- Laith Metadata
- English
- Dynodydd Rhiant
-
Condition monitoring of Special Areas of Conservation (SACs) in Wales
NRW_DS110194
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2026-10-01T14:05:33.709Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0