Special Area of Conservation (SAC) Monitoring: Shad Egg Survey on the River Wye (2011)

  • English
  • wel
  • All

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. However, it is not certain whether a breeding population of allis shad still exists. 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 summarising previous data held at the site, conducting a baseline survey and compare these with results from previous datasets. Along the length of the welsh portion of the River Wye from Builth Wells to Monmouth. The survey was conducted in May, June and July of 2011.

Identification

Dynodydd
Identifier
NRW_DS114673
Teitl Amgen
Alternative Title
  • Shad Egg Survey River Wye 2011 - CCW - Report no. 11/8/4 CCW000800000000A
  • Arolwg o Wyau Herlynod a Gwangod Afon Gwy
Laith Metadata
Metadata Language
English
Lineage

Environment Agency Wales (EAW) and Countryside Council for Wales, recorded egg survey data are available for six years on the River Wye, although widespread sampling data are only available for 1999, 2003 and 2004. The standard Hillman et al. (2003) methodology was amended to reduce the sampling required at sites where shad eggs were present. This enabled the JNCC (2005) target to be assessed and many more sites to be surveyed within the time available. Confidence in this dataset is high.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2012-01-31
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


 

Vertical Extent

Medin Extent Keyword

benthic boundary layer; water column
 
 

Distribution

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

    Specification

    [A] The report is held in word and pdf format. [B] Species data is held as spreadsheets and in Recorder 6 Shad Egg Survey River Wye 2011 - CCW - Report no. 11/8/4 CCW0008000000008. [C] Images are held in JPG format.

 

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
Degree
false
Lineage

Environment Agency Wales (EAW) and Countryside Council for Wales, recorded egg survey data are available for six years on the River Wye, although widespread sampling data are only available for 1999, 2003 and 2004. The standard Hillman et al. (2003) methodology was amended to reduce the sampling required at sites where shad eggs were present. This enabled the JNCC (2005) target to be assessed and many more sites to be surveyed within the time available. Confidence in this dataset is 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
  • River Wye (Afon Gwy)
  • Shad
  • alosa alosa
  • alosa fallax
  • allis shad
  • Eggs
  • twaite shad
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
  • Fish abundance in water bodies
  • Fish reproduction
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Adolygu)
Date (Revision)
2021-01-06
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

 

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 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.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313134363733 XML
Laith Metadata
Metadata Language
English
Parent Identifier
Freshwater Shad Monitoring Data

NRW_DS116346
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-05-31T09:41:06.71Z
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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