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.

Identifier: NRW_DS114807

Alternative Title

Lamprey Monitoring, Dee Catchment 2011 - CCW - Contract Science Report 975 CCW0008000000008
Data Monitro Llysywod Afon Dyfrdwy, 2011

Metadata Language: English

Lineage: 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.

Dataset Reference Date (Publication): 2012-04-30

Temporal Extent

Begin date: 2011-09-05

End date: 2011-09-23

Topic category

Biota

Owner

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Originator

APEM Ltd

APEM Remote Sensing, Riverview, A17 Embankement Buisness Park, Heaton Mersey, Stockport, SK4 3GN

http://www.apemltd.co.uk

Extent

Geographic Extent: SIR Y FFLINT - FLINTSHIRE

Geographic Extent: POWYS - POWYS

Geographic Extent: SIR DDINBYCH - DENBIGHSHIRE

Geographic Extent: CONWY - CONWY

Geographic Extent: WRECSAM - WREXHAM

Geographic Extent: GWYNEDD - GWYNEDD

Map representing the geographic extent of the dataset

Format Type and Description

Database ()

Specification

[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).

Data quality

Quality Scope: Dataset

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: 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.

Keywords

GEMET - INSPIRE themes, version 1.0

Species distribution

Type: Theme

Citation

Date (Publication): 2008-06-01

Code: geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus

lampreys (river lamprey, brook lamprey and sea lamprey)
river Dee (afon Dyfrdwy)

Type: Theme

Citation

Date (Publication): 2023-12-31

Code: geonetwork.thesaurus.local.theme.converted_nrw-keywords

Code: British National Grid (EPSG::27700)

Content Information

NRW Profile

Custom Elements

NRW Related Title: Lamprey monitoring on the River Dee special area of conservation SAC 2011

Constraints

Limitations on Public Access and Use

Restriction type: 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

Use constraints type: Other restrictions

Other constraints: © 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

File Identifier: 4f4c4942-4343-5764-6473-313134383037 XML

Metadata Language: English

Parent Identifier: Freshwater River lamprey (Lampetra fluviatilis), Brook lamprey (Lampetra planeri) and Sea lamprey (Petromyzon marinus) Survey Data
NRW_DS116345

Resource type: Dataset

Metadata Date: 2024-05-31T09:43:49.373Z

Metadata Standard Name: NRW

Metadata Standard Version: 1.0

pointOfContact

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Publishing Body

Access the portal

Full access to the portal and metadata.

Special Area of Conservation (SAC) Monitoring: Lamprey in the River Dee (2011)

Identification

Temporal Extent

Extent

Extent

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

Spatial Reference System

Content

Content Information

NRW Profile

Custom Elements

Constraints

Constraints

Limitations on Public Access and Use

Access Constraints Directive

Access Constraints Text

Use Constraints

Metadata

Metadata

Publishing Body