NRW_DS115518 eng dataset Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en pointOfContact 2026-03-05T10:29:57 MEDIN 3.1.2 wel eng utf8 Latitude and Longitude (EPSG::4326) Bardsey Seal Counts Bardsey Seal Counts Cyfrif Morloi Llwyd Ynys Enlli 2013-01-20 publication 4f4c4942-4343-5764-6473-313135353138 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. 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. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en owner Royal Society for the Protection of Birds (RSPB) Sutherland House, Cowbridge Road East, Cardiff, CF11 9AB cymru@rspb.co.uk http://www.rspb.org.uk/wales/ owner Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en custodian Royal Society for the Protection of Birds (RSPB) Sutherland House, Cowbridge Road East, Cardiff, CF11 9AB cymru@rspb.co.uk http://www.rspb.org.uk/wales/ custodian Porter Bardsey Monitoring Officer (volunteer), Ty Pellaf, Ynys Enlli, Aberdaron, LL53 8DE jo.porter@rspb.org <!__ Nowebsite __!> originator Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en distributor notPlanned Species distribution theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme grey seals halichoerus grypus theme NRW Thesaurus 2026-03-04 publication geonetwork.thesaurus.local.theme.converted_nrw-keywords Seal abundance Seal reproduction theme SeaDataNet Parameter Discovery Vocabulary 2024-06-19 publication geonetwork.thesaurus.external.theme.rdf+xml otherRestrictions 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. no limitations otherRestrictions © 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. Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Contains RSPB information © Royal Society for the Protection of Birds. Open Government Licence vector eng utf8 biota SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision unknown NRW Geographic Identifiers Collection 2024-01-01 publication Wales (WLS) -4.81840129 -4.75206587 52.73273058 52.77950037 2007-09-15 2013-01-20 Documents [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 dataset 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 2010-12-08 publication This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false 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). 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).