Table 2. Total sightings (on track and off track) in the different sub-areas (capital letters refer to sub-area locations in Fig 1), and mean aggregation sizes (CV = coefficient of variation; CI = confidence interval; n/a = not applicable).
| Sub-areas | Year | Season | Giant Devil Ray Sightings | Mean aggregation size | %CV | 95% CI |
|---|---|---|---|---|---|---|
| Pelagos Sanctuary (A) | 2009 | Winter | 0 | n/a | ||
| Pelagos Sanctuary (A) | 2009 | Summer | 76 | 1.04 | 3.1 | 1–1.1114 |
| Ionian Sea (E) | 2010 | Spring | 22 | 1.67 | 16.7 | 1.1784–2.3572 |
| Sardinian Sea (B) | 2010 | Summer | 49 | 1.61 | 16.8 | 1.1343–2.2883 |
| Pelagos Sanctuary (A) | 2010 | Summer | 62 | 1.29 | 8.8 | 1.0825–1.5381 |
| Central Tyrrhenian Sea (C) | 2010 | Summer | 28 | 2.26 | 18.9 | 1.5527–3.2854 |
| Southern Tyrrhenian Sea (D) | 2010–11 | Autumn-Winter | 1 | n/a | ||
| Central Tyrrhenian Sea (C) | 2013 | Summer | 60 | 1.35 | 9.3 | 1.1215–1.6251 |
| Southern Tyrrhenian Sea (D) | 2014 | Winter | 0 | n/a |