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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