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dc.contributor.authorHanson, Nora
dc.contributor.authorThompson, Dave
dc.contributor.authorDuck, Callan
dc.contributor.authorBaxter, John
dc.contributor.authorLonergan, Mike
dc.identifier.citationHanson , N , Thompson , D , Duck , C , Baxter , J & Lonergan , M 2017 , ' Harbour seal ( Phoca vitulina ) abundance within the Firth of Tay and Eden Estuary, Scotland : recent trends and extrapolation to extinction ' , Aquatic Conservation: Marine and Freshwater Ecosystems , vol. 27 , no. 1 , pp. 268-281 .
dc.identifier.otherPURE: 240327640
dc.identifier.otherPURE UUID: 3348de89-386e-4abc-8da8-9dd47e0d29fe
dc.identifier.otherScopus: 84949682025
dc.identifier.otherORCID: /0000-0002-0017-8963/work/30346973
dc.identifier.otherORCID: /0000-0003-1546-2876/work/56862221
dc.identifier.otherWOS: 000394898200020
dc.descriptionAerial surveys were funded by SNH and NERC.en
dc.description.abstract1. Aerial surveys have detected alarming declines in counts of harbour seals in several regions across Scotland. 2. Demographic data and simple models were used to examine the recent decline in the numbers of harbour seals counted in one population within a Special Area of Conservation (SAC) on the east coast of Scotland. The models suggest that the continuation of current trends would result in the species effectively disappearing from this area within the next 20 years. 3. While the cause of the decline is unknown, it must be reducing adult survival because the high rate of decline cannot be wholly accounted for by changes in other demographic parameters. 4. Recovery of the population to the abundance recorded at the time the SAC was designated (2005) is likely to take at least 40 years, even if the cause of the decline is immediately identified and removed. 5. The models suggest that partial removal of the cause can have only limited benefits to population recovery, and there are unlikely to be any long-term benefits from introducing or reintroducing additional individuals while the underlying problem persists. Therefore, if the population of harbour seals in this area is to recover it is essential that the sources of the increased mortality are identified and measures are put in place to manage these.
dc.relation.ispartofAquatic Conservation: Marine and Freshwater Ecosystemsen
dc.rights© 2016, Publisher / the Author(s). This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at /
dc.subjectSpecial Area of Conservationen
dc.subjectConservation evaluationen
dc.subjectGC Oceanographyen
dc.subjectQH301 Biologyen
dc.titleHarbour seal (Phoca vitulina) abundance within the Firth of Tay and Eden Estuary, Scotland : recent trends and extrapolation to extinctionen
dc.typeJournal articleen
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.description.statusPeer revieweden

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