Table 2.

AICc model selection results for path analytical models examining factors affecting groundspeed over the ocean and along the coast

Path model equations	K	AICc	ΔAICc	W	Cumulative W	Fisher’s C
tailwind ~ stage + age	16	67.36	0	0.70	0.68	17.81
groundspeed ~ stage + tailwind
tailwind ~ stage + age	17	69.34	1.98	0.26	0.96	14.94
groundspeed ~ stage + age + tailwind
tailwind ~ stage + age	18	73.44	6.08	0.03	0.99	13.86
groundspeed ~ stage + age + tailwind + crosswind
tailwind ~ stage + age	19	75.58	8.22	0.01	1	10.44
groundspeed ~ stage + age + tailwind + crosswind
crosswind ~ age
tailwind ~ stage + age	20	80.30	12.94	0	1	9.19
groundspeed ~ stage + age + tailwind + crosswind
crosswind ~ stage + age
tailwind ~ stage + age	13	115.39	48.03	0	1	78.69

k represents the number of parameters in each path model. W and Cumulative W represent Akaike weights and cumulative model weights, respectively. Fisher’s C statistic = −2*ln(model likelihood). The null model is defined by the top model with paths to groundspeed removed