Table 4 Distribution and activity parameters of Blue Petrels, Thin-billed prions and Antarctic Prions from Kerguelen Islands during the pre-laying exodus

Pre-laying exodus: N

4

8

7

8

7

4

 Mean distance to colony (km)

1086 ± 268

2078 ± 826

1429 ± 451

1654 ± 445

813 ± 136

1269 ± 273

F_2,32 = 5.0,P = 0.013

F_1,33 = 9.5,P = 0.004

 Max. distance to colony (km)

1995 ± 510

3418 ± 1283

2225 ± 713

2660 ± 673

1505 ± 317

1842 ± 182

F_2,32 = 5.9,P < 0.001

F_1,33 = 6.5,P = 0.016

 Mean longitude (°E)

71.4 ± 9.0

78.7 ± 29.1

53.0 ± 8.7

47.9 ± 7.9

76.1 ± 4.3

83.1 ± 7.5

F_2,32 = 12.2,P = 0.002

F_1,33 = 0.3, P = 0.598

 Mean latitude (°S)

48.2 ± 3.9

49.4 ± 2.6

52.3 ± 3.2

52.1 ± 1.3

52.0 ± 2.5

55.3 ± 0.7

F_2,32 = 7.8,P = 0.002

F_1,33 = 2.8, P = 0.101

 Time foraging (hours/day)

14.4 ± 1.3

14.4 ± 6.4

17.8 ± 0.6

17.6 ± 0.7

16.1 ± 1.0

14.9 ± 2.1

F_2,32 = 23.0,P < 0.001

F_1,33 = 1.5, P = 0.236

  - During daytime

8.9 ± 0.6

8.4 ± 1.1

12.0 ± 0.5

11.3 ± 0.8

10.3 ± 0.7

9.4 ± 1.5

F_2,32 = 25.4,P < 0.001

F_1,33 = 4.1, P = 0.052

  - During night time

5.1 ± 0.7

5.5 ± 0.6

4.1 ± 0.8

4.0 ± 0.3

3.5 ± 1.1

1.9 ± 0.9

F_2,32 = 26.5,P < 0.001

F_1,33 = 2.5, P = 0.122

  - During dusk

0.8 ± 0.2

0.8 ± 0.1

1.5 ± 0.2

1.4 ± 0.1

2.4 ± 1.0

3.6 ± 1.5

F_2,32 = 24.1,P < 0.001

F_1,33 = 2.5, P = 0.123

  - During dawn

0.2 ± 0.2

0.2 ± 0.2

0.6 ± 0.3

0.9 ± 0.3

0.1 ± 0.2

0.1 ± 0.1

F_2,32 = 19.7,P < 0.001

F_1,33 = 0.3, P = 0.614

 Time in flight (hours/day)

9.1 ± 1.4

8.7 ± 0.4

4.5 ± 0.8

4.0 ± 0.9

6.6 ± 1.4

6.3 ± 3.1

F_2,32 = 24.3,P < 0.001

F_1,33 = 0.7, P = 0.420

 Time on water (hours/day)

0.5 ± 0.2

1.0 ± 0.4

1.7 ± 0.7

2.2 ± 0.4

1.3 ± 0.7

2.8 ± 1.4

F_2,32 = 11.7,P < 0.001

F_1,33 = 11.3,P = 0.002