Drop-Down Video of Historical Native Oyster (Ostrea edulis) Habitat in Pembrokeshire, South Wales (2010)

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.

Identification

Identifier
NRW_DS114567
Alternative Title
  • 2010 CCW Drop down video survey of historical native oyster Ostrea edulis habitat in Pembrokeshire MRCCW31000000002
Metadata Language
English
Lineage

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.
Additional Information

The following reports are associated with this data: - Woolmer, AP. 2011. Drop down video of historical native oyster ostrea edulis habitat in Pembrokeshire, south Wales REDACTED. Countryside Council for Wales Science Report No. 957. Bangor. - Woolmer, AP. 2011. Drop down video of historical native oyster ostrea edulis habitat in Pembrokeshire, south Wales CONFIDENTIAL. Countryside Council for Wales Science Report No. 957. Bangor.
Dataset Reference Date (Publication)
2011-09-30
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Salacia-Marine -
Salacia-Marine, 91 New Road, Ynysmeudwy, Castell-Nedd Port Talbot, SA8 4PP, Wales
http://salacia-marine.co.uk/
Originator
  Coastal Assessment Liaison and Monitoring (CALM) -
Ti Cara, Point Lane, Cosheston, Pembrokeshire, SA72 4UN, Wales
<!--No website -->
 

Extent

Extent

Geographic Extent
Irish Sea
Geographic Extent
Carmarthen Bay
Geographic Extent
SIR BENFRO - PEMBROKESHIRE
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword

benthic boundary layer

Vertical Extent

Minimum value (metres)
-2
Maximum value (metres)
-40
Vertical CRS
 
 

Distribution

Distribution

Format Type and Description
  • Documents ( )

    Specification

    [A] Published report - Electronic version (PDF and MS Word)

  • Delimited ( )

    Specification

    [B] Raw data - MS Excel

  • Database ( )

    Specification

    [C] Raw data - Marine Recorder - survey number: MRCCW31000000002

  • Geographic Information System ( )

    Specification

    [D] Map of survey stations - JPEG maps, and digital point data (MapInfo table)

 

Quality

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

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

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.
 

Keywords

Keywords

GEMET - INSPIRE themes, version 1.0
Type
Theme

Citation

Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus
  • Stackpole
  • drop-down video
  • native oyster
  • oysters
  • South Pembrokeshire
  • Abyssinia Haul
  • ostrea edulis
  • flat oyster
  • Tenby
Type
Theme

Citation

Date (Publication)
2025-01-08
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

SeaDataNet Parameter Discovery Vocabulary
Type
Theme

Citation

Date (Publication)
2024-06-19
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

Content

Content Information

NRW Profile

Custom Elements

NRW Related Title

Drop down video of historical native oyster ostrea edulis habitat in Pembrokeshire, south Wales CONFIDENTIAL
NRW Related Title

Drop down video of historical native oyster ostrea edulis habitat in Pembrokeshire, south Wales REDACTED
 

Constraints

Constraints

Limitations on Public Access and Use

Restriction type
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

This dataset is sensitive and restricted. The sensitive data is as follows; 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 an appropriate NRW 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.
 

Use Constraints

Use constraints type
Other restrictions
Other constraints

© 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.
 

Attribution Statement

Other constraints

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313134353637 XML
Metadata Language
English
Parent Identifier
Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder

NRW_DS114501
Resource type
Dataset
Metadata Date
2026-03-03T12:27:50.331Z
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

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