Table 1.
colony | lat. | mean duration (h) | mean max. distance (km) | no. birds | source of tracking data | count (AOS/AON) | source of colony count |
---|---|---|---|---|---|---|---|
Cape St Mary’s* | 46.81 | 14.3 ± 0.5 | 72.4 ± 1.9 | 22 | [59] | 14 598 | [49] |
Baccalieu Is* | 48.15 | 9.3 ± 7.3 | 39.9 ± 24.7 | 6 | [60]a | 2253 | [52] |
Bonaventure* | 48.48 | 28 | 132 | 14 | [61] | 53 635 | |
Rouzic | 48.90 | 25.1 ± 10.9 | 124.2 ± 50.0 | 169 | [48] | 20 400 | This study |
Alderney | 49.71 | 23.0 | 122.0 | 60 | [47] | 7885 | [37] |
Funk Is.* | 49.75 | 16.5 | 102.6 | 26 | [62] | 10 047 | [52] |
Bull Rock | 51.58 | 11.9 ± 8.1 | 69.8 ± 34.1 | 14 | [12]a | 3694 | [65] |
Grassholm | 51.73 | 21.8 ± 1.7 | 116.8 ± 7.4 | 304 | [63] | 36 011 | [66] |
Little Skellig | 51.78 | 13.4 ± 11.8 | 96.5 ± 61.8 | 9 | [12]a | 29 683 | [65,67] |
Great Saltee | 52.11 | 21.5 | 98.5 | 71 | [12]a; [64]; This study | 4722 | |
Lambay | 53.50 | 11.6 ± 7.6 | 37.5 ± 19.6 | 3 | [12]a | 138 | JNCC 2010 |
Bempton | 54.15 | 9.1 | 45.7 | 35 | [53]; This study | 11 061 | JNCC 2012 |
Heligoland | 54.18 | 7.9 ± 8.0 | 42.0 ± 45.7 | 3 | [54] | 656 | [66] |
Ailsa Craig | 55.25 | 26.2 ± 16.2 | 152.3 ± 70.5 | 16 | [12]a | 33 226 | |
Bass Rock | 56.08 | 25.6 ± 12.6 | 200.1 ± 98.5 | 206 | [55–57]a | 60 953 | JNCC 2009 |
St Kilda | 57.86 | 24.3 ± 14.8 | 164.2 ± 124.1 | 21 | [12]a | 60 290 | [66] |
Sule Skerry | 59.08 | 14.4 ± 5.9 | 72.9 ± 19.8 | 2 | 1870 | ||
Vestmann-Aeyjar | 63.36 | 10.2 ± 7.4 | 43.0 ± 27.0 | 9 | [35] | 15 044 | [68] |
Skrúður | 64.90 | 4.8 ± 4.5 | 29.2 ± 24.2 | 27 | 6051 | ||
Store Ulvøyhomen | 68.85 | 6.9 | 22.3 | 43 | [58] | 308 | [27] |
Storstappen | 71.23 | 6.6 | 38.7 | 58 | 1244 |
Mean values were not available in the published sources, so tracking datasets were provided by the authors.
AON, apparently occupied nests; AOS, apparently occupied sites; JNCC, Joint Nature Conservation Committee Seabird Monitoring Program database (http://jncc.defra.gov.uk/smp/ accessed 14 January 2019).