Special Area of Conservation (SAC) Monitoring: Shad Egg Survey on the River Wye (2017)

  • 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. 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 conducting egg deposition surveys to assess spawning extent and compare these with results from previous datasets. Surveys carried out along the length of the Welsh portion of the River Wye from Builth Wells to Monmouth. The survey was conducted in May and June of 2013, 2015 & 2016.

Identification

Dynodydd
Identifier
NRW_DS119125
Teitl Amgen
Alternative Title
  • Monitro Ardaloedd Cadwraeth Arbennig (ACA): Arolwg o Wyau Gwangod ar yr Afon Gwy (2017)
Laith Metadata
Metadata Language
English
Lineage

Data is collected according to Joint Nature Conservation Committee (JNCC) published guidance on Common Standards Monitoring for Freshwater Fauna (JNCC, 2015). The distribution of spawning shad within each river catchments are assessed using a kick sampling technique for eggs conducted in the spring.
Additional Information

Garrett, HM., (2017), River Wye SAC Allis & Twaite shad population condition assessment, Reporting cycle 2013 to 2018, 23 pp., Natural Resources Wales, Dolgellau. Unpub.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2017-06-30
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 

Extent

Extent

Hyd
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

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

    Specification

    Microsoft Excel Table .XLSX format [Workbook Wye shad egg surveys 2013 onwards.xlsx]

 

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

Data is collected according to Joint Nature Conservation Committee (JNCC) published guidance on Common Standards Monitoring for Freshwater Fauna (JNCC, 2015). The distribution of spawning shad within each river catchments are assessed using a kick sampling technique for eggs conducted in the spring.
 

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
  • protected areas
  • allis shad
  • alosa alosa
  • twaite shad
  • alosa fallax
  • monitoring (see specific types of monitoring eg. woodland monitoring)
  • freshwater (fresh water, open water) (see also freshwater ecology) (see also inland waters,rivers,lakes)
  • Special Areas of Conservation (SAC) - SAC monitoring
  • Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC)
  • protected sites
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2023-12-31
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

 

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 Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313139313235 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2025-03-07T15:18:46.44Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
pointOfContact
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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