Common Scoter Survey (Melanitta nigra) in Liverpool Bay (2000-2001)

  • English
  • wel
  • All

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

Dynodydd
Identifier
NRW_DS111800
Teitl Amgen
Alternative Title
  • Arolwg o for-hwyaid duon ym Mae Lerpwl 2000-2001
Laith Metadata
Metadata Language
English
Lineage

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
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2001-08-31
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Lancashire Wildlife Trust
Wildlife Trust for Lancashire, Manchester and North Merseyside, Berkeley Drive, Bamber Bridge, Preston, Lancashire, PR5 6BY
http://www.lancswt.org.uk/
Cychwynnwr
Originator
  Casella Science and Environment Limited
PO Box 13, Runcorn, Chesire, WA7 4UH, England
<!-- No web site -->
 

Extent

Extent

Hyd
Geographic Extent
England and Wales (EAW)
Hyd
Geographic Extent
SIR YNYS MON - ISLE OF ANGLESEY
Hyd
Geographic Extent
Caernarvonshire (49)
Hyd
Geographic Extent
SIR DDINBYCH - DENBIGHSHIRE
Hyd
Geographic Extent
SIR Y FFLINT - FLINTSHIRE
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword

benthic boundary layer; water column skin
 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Documents ()

    Specification

    [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.

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
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
Degree
false
Lineage

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

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

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

Allweddair
Keywords

NRW Thesaurus
  • common scoter (black scoter)
  • melanitta nigra
  • Liverpool Bay
  • aerial surveys
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
  • Bird taxonomy-related abundance per unit area of surface
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Adolygu)
Date (Revision)
2021-01-06
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

NRW Related Title

Common Scoter Melanitta nigra survey in Liverpool Bay
 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© 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

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313131383030 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-05-31T09:38:31.538Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
pointOfContact
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

Access the portal