Provenance & quality
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 check was made and files backed up on CEH servers. All notebooks and field sheets are archived at CEH Edinburgh. The databases used were all quality controlled at source.
The integrity of results, the quality of reports, the relationship to contracted deliverables and the punctuality of reporting are all subject to management vetting and tracking within CEH.