Diet of common guillemot and razorbill at East Caithness, Buchan Ness to Collieston Coast and Isle of May in 2018 ...

• Main Authors: Andrews, C., Newell, M.A., Harris, M.P., Wanless, S., Daunt, F.
• Format: Dataset
• Language: English
• Published: NERC Environmental Information Data Centre 2020
• Subjects: Scotland; Isle of May; Biodiversity; Seabirds; Auks; Buchan; Alca torda; common guillemot; Razorbill; Uria aalge; uria
• Online Access: https://dx.doi.org/10.5285/d7164910-17cb-44cd-bccd-6a9c31b6ed70; https://catalogue.ceh.ac.uk/id/d7164910-17cb-44cd-bccd-6a9c31b6ed70

This dataset contains prey items of common guillemot Uria aalge and razorbill Alca torda observed during the 2018 breeding season at East Caithness Special Protection Area (SPA), Buchan Ness to Collieston Coast SPA and Isle of May National Nature Reserve, off the east coast of Scotland. Diet of these two species has been studied on the Isle of May since the 1980s (Harris & Wanless 1985, 1986; Wilson et al 2004; Daunt et al. 2008; Thaxter et al 2013). To our knowledge, only two previous studies of diet has been undertaken at Buchan Ness to Collieston Coast SPA (in 2006, 6km to the north of the site used in this study; Anderson et al. 2014; and in 2017, using a similar protocol as in 2018; Daunt et al. 2017), and one previous study of diet has been undertaken at East Caithness SPA (2017; Daunt et al. 2017). ... : Seabird studies on the Isle of May NNR were begun by Mike Harris (CEH) in 1973 as part of the Isle of May Long-Term Study (IMLOTS), which is a Key Site in the UK Joint Nature Conservation Committee’s (JNCC) national Seabird Monitoring Programme. The methods for calculating diet are included in the Species Account in this document and have been consistent since all seabird monitoring was standardised from 1987. The protocols are employed in the assessment of the diet of common guillemot and razorbill. The basic approach to assessing common guillemot and razorbill diet is observing prey carried in the bills of breeding adults returning to the colony to feed the young or, in the case of common guillemot only, to display to other adults. All fieldwork, sampling and data handling was carried out by experienced and trained staff to defined protocols agreed to meet the objectives of the work. All data were collected in the field in notebooks and field data sheets. These were transcribed to spreadsheets after each ...