4f4c4942-4343-5764-6473-313134353430 English NRW_DS114501 Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-03-03T14:49:06.061Z NRW 1.0 wel Latitude and Longitude (EPSG::4326) Drop-Down Video of Historical Native Oyster (Ostrea edulis) Habitat in Swansea Bay, South Wales (2010) Drop-Down Video of Historical Native Oyster (Ostrea edulis) Habitat in Swansea Bay, South Wales (2010) Fideo tanddwr o gynefin wystrys (Ostrea edulis) ym Mae Abertawe, De Cymru 2010 CCW Drop down video survey of native oyster, Ostrea edulis in Swansea bay MRCCW31000000003 2011-08-31 NRW_DS114540 The native or flat oyster (Ostrea edulis) is a UK Biodiversity Action Plan (BAP) priority species, and it is also listed for Section 42 of the Natural Environment and Rural Communities (NERC) Act 2006 as being 'of principal importance for the purpose of conserving biodiversity in Wales.' The native oyster has a long history as an important commercial species in Wales and elsewhere in the UK. Significant oyster beds are now restricted to Milford Haven, Swansea Bay/Mumbles and Porthcawl, although at a much reduced scale. The remaining oyster population in Wales is under threat through the spread of the protozoan parasite Bonamia ostreae, continued poor recruitment, and competition from the alien invasive slipper limpet Crepidula fornicata. The situation is exacerbated by the continued operation of a small oyster fishery in Milford Haven and Swansea Bay. The aim of this project was to gather information on the status of historical native oyster beds off the south Pembrokeshire coast. This information will contribute to our understanding of the status of historical native oyster beds off the south Wales coast and will inform projects to reinstate oyster habitat and stock enhancement. This dataset collates the examination of drop down video of oyster beds. This project used video data was examined to identify broad seabed type and evidence of oysters. The native or flat oyster (Ostrea edulis) is a UK Biodiversity Action Plan (BAP) priority species, and it is also listed for Section 42 of the Natural Environment and Rural Communities (NERC) Act 2006 as being 'of principal importance for the purpose of conserving biodiversity in Wales.' The native oyster has a long history as an important commercial species in Wales and elsewhere in the UK. Significant oyster beds are now restricted to Milford Haven, Swansea Bay/Mumbles and Porthcawl, although at a much reduced scale. The remaining oyster population in Wales is under threat through the spread of the protozoan parasite Bonamia ostreae, continued poor recruitment, and competition from the alien invasive slipper limpet Crepidula fornicata. The situation is exacerbated by the continued operation of a small oyster fishery in Milford Haven and Swansea Bay. The aim of this project was to gather information on the status of historical native oyster beds off the south Pembrokeshire coast. This information will contribute to our understanding of the status of historical native oyster beds off the south Wales coast and will inform projects to reinstate oyster habitat and stock enhancement. This dataset collates the examination of drop down video of oyster beds. This project used video data was examined to identify broad seabed type and evidence of oysters. 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 Salacia-Marine Salacia-Marine, 91 New Road, Ynysmeudwy, Castell-Nedd Port Talbot, SA8 4PP, Wales andy@salacia-marine.co.uk http://salacia-marine.co.uk/ Coastal Assessment Liaison and Monitoring (CALM) Ti Cara, Point Lane, Cosheston, Pembrokeshire, SA72 4UN, Wales jon@ticara.co.uk <!--No website --> Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Video survey White Oyster Ledge ostrea edulis slipper limpet Swansea Bay native oyster Porthcawl Mumbles crepidula fornicata drop-down video oysters flat oyster NRW Thesaurus 2025-01-08 geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat extent Habitat characterisation Zoobenthos taxonomic abundance Shellfish abundance and biomass in water bodies SeaDataNet Parameter Discovery Vocabulary 2024-06-19 geonetwork.thesaurus.external.theme.rdf+xml This dataset is sensitive and restricted. Sensitive data relates to the location and distribution of the native oyster Ostrea edulis. Sensitive data must be kept confidential; general release, is not permitted due to risk of harm to the environment or third parties. Sensitive data may only be released under a NRW Restricted Release Licence. Requests should be referred to NRW's Access to Information Officer. Data may be released freely if the sensitive records are removed in advance, or shown only at a coarser scale. no limitations © CNC/NRW 2011. Recipients may only re-use sensitive data in strict confidence under the terms of an appropriate NRW Licence. No publication or dissemination is permitted, except if sensitive records are removed in advance, or shown only at a coarser scale. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. 1 English biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer Irish Sea Carmarthen Bay SIR BENFRO - PEMBROKESHIRE -4.03065 -3.63359 51.428119 51.606589 2010-10-14 2010-10-17 -2 -40 Marine Biodiversity Liaison Officer, Marine and Freshwater Ecosystems Group, NRW The following reports are associated with this dataset: - Woolmer, AP. 2011. Drop down video of historical native oyster ostrea edulis habitat in Swansea, south wales CONFIDENTIAL. Countryside Council for Wales Science Report No. 985. Bangor. - Woolmer, AP. 2011. Drop down video of historical native oyster ostrea edulis habitat in Swansea, south wales REDACTED. Countryside Council for Wales Science Report No. 985. Bangor. Drop down video of historical native oyster ostrea edulis habitat in Swansea, south Wales CONFIDENTIAL Drop down video of historical native oyster ostrea edulis habitat in Swansea, south Wales REDACTED Documents [A] Published report - Electronic version (PDF and MS Word) Delimited [B] Raw data - MS Excel Database [C] Raw data - Marine Recorder 2011 (Survey Number: MRCCW31000000003) Geographic Information System [D] Map of survey stations - JPEG maps, and digital point data (MapInfo table) 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 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false Drop down video footage recorded from a survey vessel. Survey work was carried out in July 2010, resulting in video footage from 92 survey stations and sonar classification of rocky ground of a further 17 stations where deployment of video equipment was not possible. Subsequent video analysis provided basic seabed classification and recorded other factors relevant to oyster ecology including any presence of slipper limpets (Crepidula fornicata) and silt deposition. Where oyster shells were recorded, these are not confirmed as to whether specimens are live or dead. Baseline survey of seabed. In 2012 CCW had the video footage reanalysed to identify additional species and habitat records. These were entered into the existing Marine Recorder Survey. Drop down video footage recorded from a survey vessel. Survey work was carried out in July 2010, resulting in video footage from 92 survey stations and sonar classification of rocky ground of a further 17 stations where deployment of video equipment was not possible. Subsequent video analysis provided basic seabed classification and recorded other factors relevant to oyster ecology including any presence of slipper limpets (Crepidula fornicata) and silt deposition. Where oyster shells were recorded, these are not confirmed as to whether specimens are live or dead. Baseline survey of seabed. In 2012 CCW had the video footage reanalysed to identify additional species and habitat records. These were entered into the existing Marine Recorder Survey.