Bardsey Seal Counts
Cyfrif Morloi Llwyd Ynys Enlli

  • English
  • wel
  • All

Grey seals Halichoerus grypus are among the rarest seals in the world: the UK population represents about 40% of the world population and 95% of the EU population. Globally, there are three reproductively-isolated stocks of grey seal: a west Atlantic (northern North American) stock; a Baltic stock; and an East Atlantic stock. The latter extends from Iceland and northern Norway southwards to northern France, with the majority breeding around Great Britain and Ireland.


The extent of connectivity within the Irish Sea grey seal (Halichoerus grypus) population has been investigated every year since 2006 using photo-identification and bio-logging techniques.


The purpose of this data capture was to survey Bardsey seal population fluctuations. Surveys were undertaken by both trained staff and volunteers.

Identification

Dynodydd
Identifier
NRW_DS115518
Laith Metadata
Metadata Language
English
Lineage

Seal counts on Bardsey are taken during a weekly walk round the island during the period where most seals would be hauled out, dry and resting. Seals are differentiated into various stage and gender categories, from youngest to oldest, i.e. white-coat pup; fully moulted pup; youngster; juvenile (female and male); adult male and adult female; and indeterminate (sex of the individual unknown). The seasons are classified as follows: autumn (September to November); winter (December to February; to spring (March to May) and summer (June to August).
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2013-01-20
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Perchennog
Owner
  Royal Society for the Protection of Birds (RSPB) -
Sutherland House, Cowbridge Road East, Cardiff, CF11 9AB
http://www.rspb.org.uk/wales/
Cychwynnwr
Originator
  Porter -
Bardsey Monitoring Officer (volunteer), Ty Pellaf, Ynys Enlli, Aberdaron, LL53 8DE
<!__ Nowebsite __!>
 

Extent

Extent

Hyd
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword

unknown
 
 

Distribution

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

    Specification

    [A] Raw counts provided by Jo Porter in word .doc format [B] Master Speadsheet in xls format collating all the information and also collation in word format [C] Protocol for low tide counts

 

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

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

Seal counts on Bardsey are taken during a weekly walk round the island during the period where most seals would be hauled out, dry and resting. Seals are differentiated into various stage and gender categories, from youngest to oldest, i.e. white-coat pup; fully moulted pup; youngster; juvenile (female and male); adult male and adult female; and indeterminate (sex of the individual unknown). The seasons are classified as follows: autumn (September to November); winter (December to February; to spring (March to May) and summer (June to August).
 

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
  • grey seals
  • halichoerus grypus
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2026-03-04
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
Math
Type
Theme
Theme

Dyfyniad
Citation

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

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

 

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

This data is jointly owned by NRW and RSPB. There are no access restrictions on 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 and RSPB. NRW owns the copyright of the collation, but the ownership of the records themselves rests with the RSPB. Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and copyright of the owners. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
 

Attribution Statement

Other constraints

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Contains RSPB information © Royal Society for the Protection of Birds.
 

Licence

Other constraints
Open Government Licence
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313135353138 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-03-05T10:29:57.739Z
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

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