Common Scoter Survey (Melanitta nigra) in Liverpool Bay (2000-2001)
The Common Scoter is strongly migratory and often travels considerable distances over land making brief stop-overs on inland waters. It is currently listed under the Birds Directive (Annex 2) Convention on Migratory Species (Bonn Convention Appendix 2) and is featured on the UK red-listed bird of conservation concern (for the breeding population) and a UK Biodiversity Action Plan (BAP) Priority Species for conservation and is a Schedule 1 species under the Wildlife and Countryside Act 1981. The majority of wintering common scoter recorded around the Welsh coast around Carmarthen Bay, North Cardigan Bay and the North Wales coast, which in combination are thought to hold 30-36,000 birds. A further 10 sites regularly support 1000 or more birds. These are no known major concentrations away from these 13 sites, although this may be a consequence of the lack of appropriate survey. Large numbers of birds are recorded at several sites in April and May and there are significant post-breeding gatherings at three sites, including Carmarthen Bay, from August onwards. Casual observations suggest that these sites are not moulting grounds for the majority of birds. However there maybe as yet undetected moulting sites further offshore, as is the case in Denmark. The purpose of this data capture was to record the numbers and distribution of common scoter in the Liverpool Bay; to determine the accuracy of the two survey methods (aerial and land-based) and the correlation between the two; and to provide recommendations on future monitoring of common scoter in Liverpool bay.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS111800
- Alternative Title
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- Arolwg o for-hwyaid duon ym Mae Lerpwl 2000-2001
- Metadata Language
- English
- Lineage
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Four aerial surveys were completed, monthly between November 2000 and February 2001. Synchronous land-based counts were made on some dates, although complete coverage from all planned observation points was never achieved. Aerial surveys covered between 702-1142 km2 whilst land-based observations were over an estimated sea area of between 60-120 km2
- Dataset Reference Date (Publication)
- 2001-08-31
Temporal Extent
- Begin date
- 2000-11-30
- End date
- 2001-02-28
- Topic category
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- Biota
Extent
Extent
- Geographic Extent
- England and Wales (EAW)
- Geographic Extent
- SIR YNYS MON - ISLE OF ANGLESEY
- Geographic Extent
- Caernarvonshire (49)
- Geographic Extent
- SIR DDINBYCH - DENBIGHSHIRE
- Geographic Extent
- SIR Y FFLINT - FLINTSHIRE
))
Vertical Extent
- Medin Extent Keyword
- water column
Distribution
- Format Type and Description
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Documents
(
)
- Specification
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[A] The report and individual chapters are held as Word and Excel Files. [B] Data is held as .dbf files. [C] Excel spreadsheets. [D] avl files and .sbx files.
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Documents
(
)
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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Four aerial surveys were completed, monthly between November 2000 and February 2001. Synchronous land-based counts were made on some dates, although complete coverage from all planned observation points was never achieved. Aerial surveys covered between 702-1142 km2 whilst land-based observations were over an estimated sea area of between 60-120 km2
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
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NRW Thesaurus
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- melanitta nigra
- common scoter (black scoter)
- aerial surveys
- Liverpool Bay
- Type
- Theme
Citation
- Date (Publication)
- 2024-06-19
Keywords
-
SeaDataNet Parameter Discovery Vocabulary
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- Bird taxonomy-related abundance per unit area of surface
- Type
- Theme
Citation
- Date (Publication)
- 2024-06-19
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
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Common Scoter Melanitta nigra survey in Liverpool Bay
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 2001. 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
- 4f4c4942-4343-5764-6473-313131383030 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-12-13T15:50:45.971Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0