Table 6.
Harbour porpoise density (ind/km2) and abundance estimates in Portugal between 2011 and 2015, using g(0) = 0.45 (see Methods: defined for good observation conditions in SCANS II, [11]). CI, confidence interval, CV, coefficient of variation (%).
| Survey Year | Density (95% CI) | Abundance (95% CI) | CV |
|---|---|---|---|
| g(0) = 0.45 | |||
| 2011 | 0.039 (0.016–0.100) | 991 (391–2515) | 48.90 |
| 2012 | 0.096 (0.053–0.174) | 2416 (1338–4363) | 30.22 |
| 2013 | 0.120 (0.059–0.246) | 3020 (1482–6157) | 36.78 |
| 2014 | 0.057 (0.026–0.125) | 1437 (658–3135) | 40.36 |
| 2015 | 0.074 (0.034–0.162) | 1859 (853–4051) | 40.32 |
| Total | 0.061 (0.029–0.126) | 1523 (733–3163) | 31.19 |