4f4c4942-4343-5764-6473-313134383037 English NRW_DS116345 Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2024-05-31T09:43:49.373Z NRW 1.0 wel British National Grid (EPSG::27700) Special Area of Conservation (SAC) Monitoring: Lamprey in the River Dee (2011) Special Area of Conservation (SAC) Monitoring: Lamprey in the River Dee (2011) Lamprey Monitoring, Dee Catchment 2011 - CCW - Contract Science Report 975 CCW0008000000008 Data Monitro Llysywod Afon Dyfrdwy, 2011 2012-04-30 NRW_DS114807 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. 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. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en APEM Ltd APEM Remote Sensing, Riverview, A17 Embankement Buisness Park, Heaton Mersey, Stockport, SK4 3GN manchester@apemltd.co.uk http://www.apemltd.co.uk Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en sd">Species distribution Species distribution GEMET - INSPIRE themes, version 1.0 GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme lampreys (river lamprey, brook lamprey and sea lamprey) river Dee (afon Dyfrdwy) NRW Thesaurus NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations © 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. English biota SeaVoX Vertical Co-ordinate Coverages SeaVoX Vertical Co-ordinate Coverages 2021-01-06 SIR Y FFLINT - FLINTSHIRE POWYS - POWYS SIR DDINBYCH - DENBIGHSHIRE CONWY - CONWY WRECSAM - WREXHAM GWYNEDD - GWYNEDD -3.6756711 -2.8344708 52.8615902 53.0981434 2011-09-05 2011-09-23 Lamprey monitoring on the River Dee special area of conservation SAC 2011 Database [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). 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 2010-12-08 false 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. 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.