Skip to main content

Table 5 Distribution and activity parameters of Blue Petrels, Thin-billed prions and Antarctic Prions from Kerguelen Islands during the first incubation trip

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

  Blue petrel Thin-billed prion Antarctic Prion Multifactorial ANOVA
Males Females Males Females Males Females Species effect Sex effect
First incubation trip: N 0 7 1 6 7 4   
 Mean distance to colony (km) 1158 ± 334 1455 944 ± 40 1067 ± 104 1066 ± 75 F2,32 = 0.9, P = 0.416 F1,32 = 0.9, P = 0.355
 Max. distance to colony (km) 1840 ± 505 2002 1256 ± 123 1544 ± 163 1608 ± 165 F2,32 = 2.7, P = 0.091 F1,32 = 0.5, P = 0.500
 Mean longitude (°E) 77.3 ± 13.9 54.0 66.5 ± 9.8 76.1 ± 5.2 74.5 ± 5.6 F2,32 = 2.9, P = 0.082 F1,32 = 0.1, P = 0.753
 Mean latitude (°S) 52.9 ± 1.2 56.8 54.4 ± 2.2 56.8 ± 1.8 57.0 ± 0.5 F2,32 = 6.2,P = 0.009 F1,32 = 0.3, P = 0.618
 Time foraging (hours) 15.0 ± 2.6 17.1 17.6 ± 1.2 15.2 ± 0.9 15.1 ± 1.1 F2,32 = 3.6,P = 0.048 F1,32 < 0.1, P = 0.976
  - During daytime 9.8 ± 1.6 12.9 11.5 ± 0.6 10.2 ± 0.8 10.3 ± 1.1 F2,32 = 3.9,P = 0.039 F1,32 = 0.2, P = 0.672
  - During night time 4.5 ± 1.0 1.2 3.7 ± 1.8 1.1 ± 0.9 0.7 ± 0.2 F2,32 = 11.5,P < 0.001 F1,32 = 0.3, P = 0.598
  - During dusk 1.0 ± 0.2 2.9 2.8 ± 1.2 3.8 ± 0.8 4.0 ± 0.5 F2,32 = 19.8,P < 0.001 F1,32 = 0.1, P = 0.750
  - During dawn 0.1 ± 0.1 0.1 0 0 0 F2,32 = 2.6, P = 0.106 F1,32 = 0.9, P = 0.350
 Time in flight (hours) 8.5 ± 2.5 6.2 5.2 ± 1.3 7.5 ± 0.8 7.7 ± 1.5 F2,32 = 5.1,P = 0.017 F1,32 < 0.1, P = 0.916
 Time on water (hours) 0.5 ± 0.2 0.7 1.0 ± 0.6 1.3 ± 0.4 1.2 ± 0.5 F2,32 = 4.2,P = 0.032 F1,32 < 0.1, P = 0.972
  1. Multifactorial ANOVA were carried out with interactions. However, interactions were not statistically significant (all P > 0.05) and are therefore not given here