Table 1. Body mass of 327 Black-Headed Gulls over a 7-year period.
| Arriving |
Staying |
Flying away |
|||||
|---|---|---|---|---|---|---|---|
| n | mass (g) | n | mass (g) | n | mass (g) | ||
| Age class | Adult | 134 | 278.5a (± 11.7) | 71 | 284.4b (± 10.7) | 91 | 269.3ab (± 15.0) |
| Yearling | 9 | 300.0 (± 35.8) | 11 | 292.9 (± 22.5) | 11 | 273.8 (± 12.3) | |
Summary of the capture number and average body mass (g) at each period. The same letter after a measurement indicates a significant difference (P<0.05). Age and body mass (± SD) are presented. There was no significant difference between Adult and Yearling in the wintering period, indicating that there was no difference in body mass depending on age.