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Table 3 Timing of the early breeding season phases in Blue Petrels, Thin-billed prions and Antarctic Prions from Kerguelen Islands

From: Niche switching and leapfrog foraging: movement ecology of sympatric petrels during the early breeding season

  Blue petrel Thin-billed prion Antarctic Prion
Males Females Males Females Males Females
N 4 8 7 8 7 4
Arrival to the colony 8.9.
(3.9.-15.9.)
12.9.
(9.9.-19.9.)
10.10.
(5.10.-12.10.)
12.10.
(8.10.-14.10.)
20.11.
(13.11.-27.11.)
27.11.
(17.11.-5.12.)
Pre-exodus phase (days) 9.5 ± 6.4 3.9 ± 2.4 16.6 ± 9.0 5.1 ± 2.9 5.4 ± 2.2 4.5 ± 1.3
Pre-laying exodus
 Start 18.9.
(11.9.-27.9.)
15.9.
(11.9.-27.9.)
27.10.
(15.10. − 1.11.)
20.10.
(14.10.-25.10.)
26.11.
(17.11.-2.12.)
1.12.
(23.11.-10.12.)
 End 3.11.
(31.10.-9.11.)
29.10.
(20.10.-15.11.)
18.11.
(17.11.-23.11.)
19.11.
(15.11.-26.11.)
23.12.
(16.12.-27.12.)
22.12.
(18.12.-27.12.)
 Duration (days) 47.3 ± 3.2 44.1 ± 3.2 22.9 ± 7.5 32.1 ± 2.6 28.4 ± 5.3 22.2 ± 6.4
First incubation trip: N 0 7 1 6 7 4
 Start 28.10.
(20.10.-31.10.)
25.11.
-
19.11.
(17.11.-21.11.)
31.12.
(25.12.-5.1.)
26.12.
(21.12.-30.12.)
 End 11.11.
(2.11.-14.11.)
2.12.
-
28.11.
(27.11.-1.12.)
8.1.
(3.1.-12.1.)
6.1.
(4.1.-7.1.)
 Duration (days) 14.4 ± 0.7 8 10.7 ± 0.7 8.7 ± 0.7 8.8 ± 2.0
  1. Means and ranges are given for dates, and means and standard deviation for durations. Because Antarctic prions do not undertake one long pre-laying exodus, the total duration of the phase is given for this species