SAC Monitoring: Shad Egg Survey River Usk and River Wye (2012)
Arolwg o Wyau Herlynod a Gwangod Afon Wysg ac Afon Gwy (2012)

  • English
  • wel
  • All

The Rivers Usk and Wye are designated as Special Areas of Conservation (SACs) under the EC Habitats Directive (92/43/EEC) for several qualifying features, including twaite shad (Alosa fallax) and allis shad (Alosa alosa). Shad are migratory members of the Clupeidae (herring) family that ascend rivers to spawn in late spring. Populations of both species are threatened across Europe, primarily due to barriers to migration and issues relating to water quality. In the UK, significant populations of shad spawn in the Rivers Severn, Usk, Wye, and Tywi.


The Rivers Usk and Wye have been designated as SACs for shad and other qualifying features, including salmon, lamprey species, and bullhead. The purpose of this data capture was to support the assessment of favourable conservation status within the Usk and Wye catchments and to supplement the primary shad spawning distribution condition assessments for these rivers. Previous surveys were carried out on the River Usk in 2010 and 2011, and on the River Wye in 2011.


Seven sites were selected along the River Usk and 10 sites along the River Wye. Both surveys were conducted between periods of high river flow, and all fieldwork was undertaken by qualified Countryside Council for Wales (CCW) monitoring staff. Confidence in this dataset is therefore considered to be high.

Identification

Dynodydd
Identifier
NRW_DS115294
Teitl Amgen
Alternative Title
Laith Metadata
Metadata Language
English
Lineage

The Rivers Usk and Wye are designated as Special Areas of Conservation (SACs) under the EC Habitats Directive (92/43/EEC) for several qualifying features, including twaite shad (Alosa fallax) and allis shad (Alosa alosa). Shad are migratory members of the Clupeidae (herring) family that ascend rivers to spawn in late spring. Populations of both species are threatened across Europe, primarily due to barriers to migration and issues relating to water quality. In the UK, significant populations of shad spawn in the Rivers Severn, Usk, Wye, and Tywi.


The Rivers Usk and Wye have been designated as SACs for shad and other qualifying features, including salmon, lamprey species, and bullhead. The purpose of this data capture was to support the assessment of favourable conservation status within the Usk and Wye catchments and to supplement the primary shad spawning distribution condition assessments for these rivers. Previous surveys were carried out on the River Usk in 2010 and 2011, and on the River Wye in 2011.


Seven sites were selected along the River Usk and 10 sites along the River Wye. Both surveys were conducted between periods of high river flow, and all fieldwork was undertaken by qualified Countryside Council for Wales (CCW) monitoring staff. Confidence in this dataset is therefore considered to be high.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2013-06-30

Temporal Extent

Begin date
2012-03-15
End date
2012-05-30
 
Categori pwnc
Topic category
  • Biota
    Biota
  • Environment
    Environment
  • Inland waters
    Inland waters
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Countryside Council for Wales (CCW) -
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
 

Extent

Extent

Hyd
Geographic Extent
SIR FYNWY - MONMOUTHSHIRE
Hyd
Geographic Extent
POWYS - POWYS
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Dosbarthiad
Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Documents ( Unknown )

    Specification

    Final report held in Microsoft Word and Adobe PDF formats.

  • Image ( Unknown )

    Specification

    Survey photographs and associated images held in JPEG format.

  • Delimited ( Unknown )

    Specification

    Raw survey data workbook held in Microsoft Excel format.

  • Database ( Unknown )

    Specification

    Species data held in Recorder 6 under reference CCW000800000000Q.

  • Geographic Information System ( Unknown )

    Specification

    GIS layers held in MapInfo TAB format.

  • Text or Plaintext ( Unknown )

    Specification

    Field notes held in paper and PDF formats.

 

Quality

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

The Rivers Usk and Wye are designated as Special Areas of Conservation (SACs) under the EC Habitats Directive (92/43/EEC) for several qualifying features, including twaite shad (Alosa fallax) and allis shad (Alosa alosa). Shad are migratory members of the Clupeidae (herring) family that ascend rivers to spawn in late spring. Populations of both species are threatened across Europe, primarily due to barriers to migration and issues relating to water quality. In the UK, significant populations of shad spawn in the Rivers Severn, Usk, Wye, and Tywi.


The Rivers Usk and Wye have been designated as SACs for shad and other qualifying features, including salmon, lamprey species, and bullhead. The purpose of this data capture was to support the assessment of favourable conservation status within the Usk and Wye catchments and to supplement the primary shad spawning distribution condition assessments for these rivers. Previous surveys were carried out on the River Usk in 2010 and 2011, and on the River Wye in 2011.


Seven sites were selected along the River Usk and 10 sites along the River Wye. Both surveys were conducted between periods of high river flow, and all fieldwork was undertaken by qualified Countryside Council for Wales (CCW) monitoring staff. Confidence in this dataset is therefore considered to be high.
 

Keywords

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair
Keywords

NRW Thesaurus
  • alosa fallax
  • Shad
  • River Usk
  • twaite shad
  • allis shad
  • Special Areas of Conservation (SAC) - SAC monitoring
  • alosa alosa
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2026-08-27
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

NRW Related Title

River Usk and River Wye shad egg survey 2012
NRW Related Title

River Usk shad egg survey 2010
NRW Related Title

River Usk shad egg survey 2011
NRW Related Title

River Wye shad egg survey 2011
 

Constraints

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 2012. 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

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313135323934 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
2026-09-29T11:19:25.647Z
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

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