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dc.contributor.authorLangley, Izzy
dc.contributor.authorRosas Da Costa Oliver, Tobias Vasco
dc.contributor.authorHiby, Lex
dc.contributor.authorStringell, Thomas
dc.contributor.authorMorris, Ceri
dc.contributor.authorO'Cahdla, Oliver
dc.contributor.authorMorgan, Lisa
dc.contributor.authorLock, Kate
dc.contributor.authorPerry, Sarah
dc.contributor.authorWestcott, Stephen
dc.contributor.authorBoyle, Dave
dc.contributor.authorBeuche, Birgitta
dc.contributor.authorStubbings, Edward
dc.contributor.authorBoys, Rebecca
dc.contributor.authorSelf, Holly
dc.contributor.authorLindenbaum, Charles
dc.contributor.authorStrong, Powell
dc.contributor.authorBaines, Mick
dc.contributor.authorPomeroy, Patrick
dc.identifier.citationLangley , I , Rosas Da Costa Oliver , T V , Hiby , L , Stringell , T , Morris , C , O'Cahdla , O , Morgan , L , Lock , K , Perry , S , Westcott , S , Boyle , D , Beuche , B , Stubbings , E , Boys , R , Self , H , Lindenbaum , C , Strong , P , Baines , M & Pomeroy , P 2020 , ' Site use and connectivity of female grey seals ( Halichoerus grypus ) around Wales ' , Marine Biology , vol. 167 , 86 .
dc.identifier.otherPURE: 258344205
dc.identifier.otherPURE UUID: 976e3b94-6b02-453b-9af6-0788f8b552c8
dc.identifier.otherORCID: /0000-0003-1603-5630/work/74872742
dc.identifier.otherWOS: 000538064800004
dc.identifier.otherScopus: 85085895892
dc.descriptionThe UK Natural Environment Research Council (NERC) provided core funding to the Sea Mammal Research Unit during this work and NERC Grant No. NE/G008930/1 to PP and LH to develop photo-ID use for grey seals. The Esmée Fairbairn Foundation provided additional funding to PP and LH for photo-ID work with grey seals. NRW funded survey work by MB, LM, SW and PS; contracted LH for survey design, software development and data management; IL and PP for work related to the production of this manuscript.en
dc.description.abstractGrey seals (Halichoerus grypus) are a qualifying feature of three special areas of conservation (SACs) in Wales, yet relatively little is known of their site use along this coastline. Since 1992, many individuals and organisations have contributed to a grey seal photographic identification database held by Natural Resources Wales, which is one of the largest and oldest of its kind, providing key information from grey seal haul-out sites around the Celtic and Irish Seas. Here, we investigated spatial connectivity of haul-out sites and fidelity of adult females to breeding sites. The minimum number of adult female grey seals using the area between 1992 and 2016 was 2688. Individual capture histories and relative spatial transition probabilities (Pij) between pairs of location groups were calculated. Adjacent locations were highly connected (e.g. Lleyn Peninsula and Bardsey, Pij = 0.7) but connections spanned the entire region, up to 230 km apart (e.g. Skomer and Dee Estuary, Pij = 0.004). Resights were recorded within SACs (e.g. Lleyn Peninsula and Bardsey [Lleyn Peninsula and the Sarnau SAC], Pij = 0.7), between SACs (e.g. Bardsey and Skomer [Pembrokeshire Marine], Pij = 0.03), between SACs and non-designated areas (e.g. Skerries and Bardsey, Pij = 0.09) and between sites outside any protected area (e.g. Dee Estuary and Anglesey, Pij = 0.5). While inter-annual fidelity to breeding sites was high (Pij = 0.82–1), individual female grey seals moved throughout the region. This evidence of extensive site use beyond protected areas is important for the management and conservation of grey seals around Wales.
dc.relation.ispartofMarine Biologyen
dc.rightsCopyright © The Author(s) 2020. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit
dc.subjectQH301 Biologyen
dc.titleSite use and connectivity of female grey seals (Halichoerus grypus) around Walesen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Biologyen
dc.contributor.institutionUniversity of St Andrews.Sea Mammal Research Uniten
dc.contributor.institutionUniversity of St Andrews.Marine Alliance for Science & Technology Scotlanden
dc.contributor.institutionUniversity of St Andrews.Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews.Centre for Research into Ecological & Environmental Modellingen
dc.description.statusPeer revieweden

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