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Inter-annual population (and sample) overlap (%) in the 5 km by 5 km grid cells used in the CFA and HRA of a population of northern gannets breeding on Alderney, Channel Islands
| 2011 | 2013 | 2014 | 2015 | |
|---|---|---|---|---|
| CFA | ||||
| 2011 | X | 30 (15) | 28 (15) | 52 (32) |
| 2013 | 41 (13) | X | 51 (27) | 66 (40) |
| 2014 | 41 (13) | 55 (28) | X | 87 (53) |
| 2015 | 47 (15) | 46 (23) | 55 (29) | X |
| HRA | ||||
| 2011 | X | 90 (57) | 89 (54) | 102 (71) |
| 2013 | 67 (36) | X | 74 (45) | 92 (64) |
| 2014 | 78 (42) | 87 (55) | X | 107 (75) |
| 2015 | 63 (34) | 78 (49) | 77 (47) | X |
