Table 3 Results of Tukey’s HSD Test for multiple comparisons of collision estimates produced using flight height distributions generated from GPS and from altimeters, excluding floating or stationary bouts. Comparisons of means were examined in relation to sampling rate (five minutes and 10 s), colony (Isle of May and Havergate), and year (2019 and 2020)
Method | Rate | Colony | Year | Mean Difference | 95% Confidence Intervals | P-value | |
|---|---|---|---|---|---|---|---|
Lower | Upper | ||||||
Altimeter | Five Min ~ Ten Sec | Combined | Combined | 10.84 | 2.89 | 18.78 | 0.00 |
GPS | Five Min ~ Ten Sec | 0.82 | − 7.13 | 8.77 | 0.99 | ||
Altimeter ~ GPS | Combined | 16.78 | 12.47 | 21.10 | 0.00 | ||
Five Minutes | 10.95 | 3.01 | 18.90 | 0.00 | |||
Ten Seconds | 22.61 | 14.66 | 30.56 | 0.00 | |||
Five Minutes | Havergate | 2019 | 45.88 | 30.79 | 60.96 | 0.00 | |
2020 | 2.29 | − 12.80 | 17.37 | 1.00 | |||
Isle of May | 2019 | 22.33 | 7.25 | 37.42 | 0.00 | ||
2020 | 26.67 | 11.59 | 41.76 | 0.00 | |||
Ten Seconds | Havergate | 2019 | 66.76 | 51.67 | 81.84 | 0.00 | |
2020 | 13.08 | − 2.00 | 28.16 | 0.18 | |||
Isle of May | 2019 | 42.05 | 26.96 | 57.13 | 0.00 | ||
2020 | 31.44 | 16.36 | 46.53 | 0.00 | |||