Collection Activity and Crab Survey in the Menai Strait (2009)
Special Areas of Conservation (SACs) are strictly protected sites designated under the EC Habitats Directive. In the Menai Strait and Conwy Bay SAC the relevant Annex I intertidal habitat features are Mudflats and sandflats not covered by seawater at low tide and Reefs. Specific areas of interest include areas of tide-swept bedrock and boulders and areas of tide-swept Fucus serratus on mixed sediment along the Menai Strait. In previous studies it was noted that a portion of the boulders had been turned by bait collectors. Surveys to assess bait collection activity and crab counts were carried out along the length of the shoreline of the Menai Strait using student volunteers. Data quality and confidence considered high.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS115077
- Alternative Title
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- 2009 CCW Menai Strait and Conwy Bay SAC collecting activity and crab survey MRCCW3000000005D
- Gweithgarwch casglu ac arolwg crancod yn Afon Menai 2009
- Metadata Language
- English
- Lineage
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The intertidal zone of each site was divided into approximately 200 m long sections and given 'shore block' codes. In each shore block the amount of collecting activity was observed for 10 minutes and recorded; winkle collectors and peeler collectors were noted as well as any unknown activities. The boulder turning frequency was also recorded for each shore block. In addition, the surveyors worked along the lower-mid shore evaluating the number of turned boulders; 30 boulders were checked in each shore block. Crab counts were also recorded; juvenile Carcinus maenas, adult Carcinus maenas and juvenile Cancer pagurus.
- Additional Information
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The associated report for this dataset is as follows: Moore, J., Brazier. P., Hobbs, E. 2009 Intertidal SAC monitoring Menai Strait and Conwy Bay SAC June 2009. CCW Marine Monitoring Report 82. Bangor.
- Dataset Reference Date (Publication)
- 2010-11-30
Temporal Extent
- Begin date
- 2009-06-25
- End date
- 2009-06-26
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- GWYNEDD - GWYNEDD
))
Vertical Extent
- Medin Extent Keyword
- benthic boundary layer
Distribution
- Format Type and Description
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Database
()
- Specification
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[A] Digital versions of the contract report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version. [B] MapInfo GIS layer in MapInfo Native format (Tables): - Positions of survey blocks. [C] Excel spreadsheets for activity and crab counts [D] Photographs of boulders [E] Marine Recorder file [MRCCW3000000005D]
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Database
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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The intertidal zone of each site was divided into approximately 200 m long sections and given 'shore block' codes. In each shore block the amount of collecting activity was observed for 10 minutes and recorded; winkle collectors and peeler collectors were noted as well as any unknown activities. The boulder turning frequency was also recorded for each shore block. In addition, the surveyors worked along the lower-mid shore evaluating the number of turned boulders; 30 boulders were checked in each shore block. Crab counts were also recorded; juvenile Carcinus maenas, adult Carcinus maenas and juvenile Cancer pagurus.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- boulders
- underboulder
- bait digging (bait collecting)
- winkles
- littorina littorea
- crabs
- activities
- turning
- peelers
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
Keywords
- SeaDataNet Parameter Discovery Vocabulary
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- Zoobenthos taxonomic abundance
- Type
- Theme
Citation
- Date (Revision)
- 2021-01-06
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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Intertidal SAC monitoring Menai Strait and Conwy Bay SAC : June 2009
- NRW Related Title
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Intertidal SAC monitoring Menai Strait and Conwy Bay SAC June 2008
- NRW Related Title
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Across Wales intertidal SAC monitoring Menai Strait and Conwy Bay SAC september 2007
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
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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
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© CNC/NRW 2010. 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
- File Identifier
- 4f4c4942-4343-5764-6473-313135303737 XML
- Metadata Language
- English
- Parent Identifier
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Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder
NRW_DS114501
- Resource type
- Dataset
- Metadata Date
- 2024-12-09T12:37:52.292Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0