Special Area of Conservation (SAC) Monitoring: Lamprey in the River Dee (2011)
River, Brook and Sea Lamprey are a designated (Annex II) feature of the River Dee Special Area of Conservation. The purpose of this data collection was to assess the conservation status of the Annex II features, including species composition, distribution, abundance and size class composition are of particular interest as an indication of Condition Assessment. Monitoring was undertaken on the Dee Catchment in 2011.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS114807
- Teitl Amgen
-
- Lamprey Monitoring, Dee Catchment 2011 - CCW - Contract Science Report 975 CCW0008000000008
- Data Monitro Llysywod Afon Dyfrdwy, 2011
- Laith Metadata
- English
- Datganiad
-
In 2011 monitoring is a continuation of data collected in 2004, which included the capture of historical records from 1985 onwards. Electrofishing methodologies were used. Following the LIFE protocol, where possible, surveys were carried out in both optimal and sub-optimal habitat at each site. Habitats were surveyed quantitatively using an enclosed area as a barrier to fish movement. Where possible a 1 m2 quadrat, enclosed with 2 mm fine mesh netting was positioned over the selected habitat at each survey site and then left to settle. At sub optimal sites a complete 1 m2 area of habitat was often not present. In this case several areas of sub optimal habitat were sampled within the 100 m stretch to represent a combined area of 1 m2. Under these circumstances a quadrat was not used to enclose the sample area. Electric fishing was undertaken within the quadrat in such a way as to draw individual lamprey out of the sediment rather than stunning and trapping them in the silt. The anode was energised in short bursts of 20 seconds followed by 5 second gaps. This was carried out over a two minute period. This procedure was classed as a single run, which in optimal habitats was subsequently repeated at least twice within the same quadrat (with a five minute gap between runs). In sub-optimal habitats a single run was carried out at each site.
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2012-04-30
Ystod amser
- Dyddiad cychwyn
- 2011-09-05
- Dyddiad gorffen
- 2011-09-23
- Categori pwnc
-
- Biota
Rhychwant
Rhychwant
- Hyd
- SIR Y FFLINT - FLINTSHIRE
- Hyd
- POWYS - POWYS
- Hyd
- SIR DDINBYCH - DENBIGHSHIRE
- Hyd
- CONWY - CONWY
- Hyd
- WRECSAM - WREXHAM
- Hyd
- GWYNEDD - GWYNEDD
))
Dosbarthiad
- Fformat - Math a Disgrifiad
-
-
Database
()
- Math
-
[A] The final report in Microsoft Word and Adobe PDF formats. Ffynnon Reference Number DCT-12-231336. [B] A full set of maps produced in JPEG format (to be provided if available) [C] A series of GIS layers on which the maps in the report are based in MapInfo format (to be provided). [D] A series of spreadsheets in Microsoft xlsx format detailing; catch, habitat data, length/frequency data & poultaion estimates - River Dee Lamprey Surveys_2011_All catch.xlsx - River Dee Lamprey Surveys_2011_Habitat Data.xlsx - River Dee Lamprey Surveys_2011_Length Frequency.xlsx - River Dee Lamprey Surveys_2011_Population Estimates_Optimal.xlsx - River Dee Lamprey Surveys_2011_Population Estimates_Sub-Optimal.xlsx [E] Species data provide in Recorder 6 import format (Microsoft xlsx) Recorder_Import_template_V32_APEM.xlsx [F] A full set of site images produced in jpg format (to be provided).
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Database
()
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Datganiad
-
In 2011 monitoring is a continuation of data collected in 2004, which included the capture of historical records from 1985 onwards. Electrofishing methodologies were used. Following the LIFE protocol, where possible, surveys were carried out in both optimal and sub-optimal habitat at each site. Habitats were surveyed quantitatively using an enclosed area as a barrier to fish movement. Where possible a 1 m2 quadrat, enclosed with 2 mm fine mesh netting was positioned over the selected habitat at each survey site and then left to settle. At sub optimal sites a complete 1 m2 area of habitat was often not present. In this case several areas of sub optimal habitat were sampled within the 100 m stretch to represent a combined area of 1 m2. Under these circumstances a quadrat was not used to enclose the sample area. Electric fishing was undertaken within the quadrat in such a way as to draw individual lamprey out of the sediment rather than stunning and trapping them in the silt. The anode was energised in short bursts of 20 seconds followed by 5 second gaps. This was carried out over a two minute period. This procedure was classed as a single run, which in optimal habitats was subsequently repeated at least twice within the same quadrat (with a five minute gap between runs). In sub-optimal habitats a single run was carried out at each site.
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
- NRW Thesaurus
-
- lampreys (river lamprey, brook lamprey and sea lamprey)
- river Dee (afon Dyfrdwy)
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
- Teitlau cysylltiedig CNC
-
Lamprey monitoring on the River Dee special area of conservation SAC 2011
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 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.
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313134383037 XML
- Laith Metadata
- English
- Dynodydd Rhiant
-
Freshwater River lamprey (Lampetra fluviatilis), Brook lamprey (Lampetra planeri) and Sea lamprey (Petromyzon marinus) Survey Data
NRW_DS116345
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2024-05-31T09:43:49.373Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
-
1.0