Special Area of Conservation (SAC) Monitoring: Shad Egg Survey on the River Wye (2017)
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.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS119125
- Teitl Amgen
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- Monitro Ardaloedd Cadwraeth Arbennig (ACA): Arolwg o Wyau Gwangod ar yr Afon Gwy (2017)
- Laith Metadata
- English
- Datganiad
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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.
- Gwybodaeth ychwanegol
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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)
- 2017-06-30
Rhychwant
Rhychwant
- Hyd
- Wales (WLS)
))
Dosbarthiad
- Fformat - Math a Disgrifiad
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Delimited
()
- Math
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Microsoft Excel Table .XLSX format [Workbook Wye shad egg surveys 2013 onwards.xlsx]
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Delimited
()
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Datganiad
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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.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
- NRW Thesaurus
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- 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
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Cyfarwyddeb Cyfyngiadau Mynediad
- Cyfyngiadau
- no limitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
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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 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
- 4f4c4942-4343-5764-6473-313139313235 XML
- Laith Metadata
- English
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2024-05-31T09:41:33.434Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
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1.0