Movement Ecology

Table 1 Summary statistics of colony influence on maximum distance (km), path length (km), and duration (h)

From: Foraging movements of breeding Kelp Gulls in South Africa

Model	Fixed factors	Model estimates ± SE	AICc	DF	R²m	R²c
Log (Max distance) ~ Intercept			1152.41	3
Log (Max distance) ~ Colony	Intercept DW	1.94 ± 0.21	1108.95	8	0.26	0.31
	Colony MA	−0.17 ± 0.30
	Colony JU	0.07 ± 0.28
	Colony ST	−1.66 ± 0.27
	Colony KE	−1.79 ± 0.36
	Colony SW	−1.58 ± 0.48
Log (Path length) ~ Intercept			1161.91
Log (Path length) ~ Colony	Intercept DW	2.86 ± 0.20	1118.01	5	0.25	0.28
	Colony MA	−0.16 ± 0.29
	Colony JU	0.05 ± 0.27
	Colony ST	−1.63 ± 0.26
	Colony KE	−1.78 ± 0.35
	Colony SW	−1.48 ± 0.47
Log (Trip duration) ~ Intercept			906.09
Log (Trip duration) ~ Colony	Intercept DW	0.55 ± 0.15	888.43	5	0.14	0.21
	Colony MA	−0.03 ± 0.22
	Colony JU	−0.01 ± 0.20
	Colony ST	−0.80 ± 0.20
	Colony KE	−0.71 ± 0.27
	Colony SW	−0.88 ± 0.35

We used linear mixed-effect models with colony as fixed factors and bird ID as random intercept. All response variables were log transformed. Intercept DW is the intercept and the estimate for the Colony DW. Model estimates and standard errors are shown for the six colonies. We provided the marginal R² which represents the variance explained by the fixed factors alone, and the conditional R² which describes the variance explained by both the fixed and random factors. Colonies DW Dwarskersbos, MA Malgas Island, JU Jutten Island, ST Strandfontein, KE Keurbooms, SW Swartkops

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ISSN: 2051-3933

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