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Table 5 Laysan albatross: Mean values of behavioral parameters and track characteristics for each cluster

From: Shadowed by scale: subtle behavioral niche partitioning in two sympatric, tropical breeding albatross species

     Cluster LA1 Cluster LA2
     N = 6 N = 12
  Test F P Mean ± SD Mean ± SD
Behavioral parameters
% Day in transit lm 9.2 0.008** 24.7 ± 8.6 43.1 ± 12.3
% Night in transitb lm 4.4 0.05** 28.4 ± 15.1 13.6 ± 11.9
% Day in transit forage lm 17.2 0.0009** 33.6 ± 7.4 16.9 ± 7.6
% Night in transit forageb lm 7.3 0.02** 15.0 ± 9.7 5.5 ± 4.6
% Day in ARS lm 4.9 0.04** 4.8 ± 6.8 13.4 ± 7.5
% Night in ARS lm 5.8 0.03** 24.3 ± 6.3 14.4 ± 8.1
% Day in ARS forage lm 8.6 0.01** 25.5 ± 6.4 11.7 ± 9.5
% Night in ARS forageb lm 0.1 0.74 15.8 ± 5.5 14.0 ± 11.0
% Day in drifta gls 2.7 0.10* 2.7 ± 2.5 3.8 ± 7.4
% Night in drifta gls 18.5 0.00001** 7.0 ± 9.0 16.7 ± 16.9
% Day in drift forage lm 0.8 0.48 4.9 ± 3.6 8.0 ± 6.1
% Night in drift forage lm 16.3 0.001** 8.1 ± 8.8 34.2 ± 17.0
Day landing ratea lm 0.81 0.38 1.59 ± 0.43 1.37 ± 0.64
Night landing ratea lm 7.8 0.01** 0.86 ± 0.37 2.12 ± 1.36
Track characteristics
Daily travel gls 7.6 0.02** 635 ± 124 443 ± 147
Max distance gls 2.0 0.17 691 ± 355 421 ± 354
Total distance gls 9.9 0.009** 1425 ± 380 716 ± 385
Trip duration lm 1.6 0.23 2.57 ± 0.6 2.03 ± 0.9
  1. A linear model (lm) was used when homogeneity was not violated and a generalized least squares model (gls) was applied when parameters showed heterogeneity, incorporating a ‘varIdent’ variance structure
  2. Significance was set at P ≤ 0.05 (**) and marginal significance to P ≤ 0.1 (*)
  3. alog10-transformed for gls or lm
  4. bsquare-root transformed for gls or lm