Afon Teifi Special Area of Conservation (SAC) population attribute condition assessment for brook, river and sea lamprey population 2014 . Habitats Directive third reporting cycle 2013 – 2018
River lamprey (Lampetra fluviatilis), Brook lamprey (Lampetra planeri), and Sea lamprey (Petromyzon marinus) are designated features of the Afon Teifi Special Area of Conservation (SAC). Assessments of species composition, distribution, abundance and size composition of larval lamprey (ammocoetes and transformers) populations in these river are of particular interest as an indication of Condition Assessment. The data was collected to help assess the conservation status of Lampreys in the Teifi catchments. This collation of lamprey data is made up of data collected by Countryside Council for Wales (CCW), Environment Agency Wales and Natural Resources Wales. The collation includes information about species distribution, composition and abundance for river, brook and sea lampreys which are a designated (Annex II) features within SAC rivers in Wales. The majority of the data was recorded at the genus level and no distinction was made between river and brook lampreys. However for some historical data no distinction was made between sea and river/brook lampreys and these were recorded at the family level.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS116819
- Teitl Amgen
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- Asesiad cyflwr priodoledd poblogaeth lampreiod nant, afon a môr 2014 Ardal Cadwraeth Arbennig (ACA) Afon Teifi. Cyfarwyddeb Cynefinoedd – trydydd cylch adrodd 2013 – 2018
- Laith Metadata
- English
- Datganiad
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Lamprey populations and condition assessments have previously been carried out by CCW in 2005 and 2013. The field survey was conducted in 2014 by Natural Resources Wales staff using the standard electrofishing methodology. A condition assessment is made using the JNCC Common Standards Monitoring Guidance for Freshwater Fauna (2016). Quantitative quadrat surveys were carried out in both optimal (very silty) and sub-optimal (more rocky) habitats. Electric fishing techniques were used inside a 1m2 quadrat to draw lamprey out of the silt rather than stunning and trapping them within the silt. Sampling of optimal habitats quadrats was done three times whilst sub-optimal habitats were sampled once. The original data contains positive and negative samples. Confidence in this dataset is high.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2016-12-31
Rhychwant
Rhychwant
- Hyd
- SIR GAERFYRDDIN - CARMARTHENSHIRE
))
Dosbarthiad
- Fformat - Math a Disgrifiad
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Database
()
- Math
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KiECO / WISKI
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Database
()
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Datganiad
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Lamprey populations and condition assessments have previously been carried out by CCW in 2005 and 2013. The field survey was conducted in 2014 by Natural Resources Wales staff using the standard electrofishing methodology. A condition assessment is made using the JNCC Common Standards Monitoring Guidance for Freshwater Fauna (2016). Quantitative quadrat surveys were carried out in both optimal (very silty) and sub-optimal (more rocky) habitats. Electric fishing techniques were used inside a 1m2 quadrat to draw lamprey out of the silt rather than stunning and trapping them within the silt. Sampling of optimal habitats quadrats was done three times whilst sub-optimal habitats were sampled once. The original data contains positive and negative samples. Confidence in this dataset is high.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
- NRW Thesaurus
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- protected species
- conservation assessment
- biological monitoring
- biological surveys
- electrofishing
- Teifi
- river lamprey
- lampetra fluviatilis
- Lamprey ammocoetes
- lampreys (river lamprey, brook lamprey and sea lamprey)
- sea lamprey
- petromyzon marinus
- brook lamprey
- lampetra planeri
- 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 on 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
- 4f4c4942-4343-5764-6473-313136383139 XML
- Laith Metadata
- English
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2024-05-31T09:37:24.669Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
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1.0