Time and energy costs of different foraging choices in an avian generalist species

Table 3 Zero-inflated Poisson linear model for the number of trips initiated per day against chick age and sex. Linear mixed models for proxies of daily energy and time investments against chick age and the proportion of marine trips

Dependent variable	Factor		Estimated marginal mean or coefficient ± s.e.	χ²₍₁₎	P
Number of trips	Chick age	Days	0.06 ± 0.01	39.9	< 0.01
	Chick age	Days²	−0.002 ± 0.0003	32.7	< 0.01
	Sex	Female	1.90 ± 0.07	18.7	< 0.01
	Sex	Male	1.59 ± 0.06
Summed daily ODBA (g)	Intercept		9.47 ± 0.41
	Chick age		0.09 ± 0.01	38.7	< 0.001
	Proportion of marine trips		0.94 ± 0.36	7.0	0.008
Time away from colony (h)	Intercept		8.76 ± 0.38
	Chick age		0.14 ± 0.01	113.0	< 0.001
	Proportion of marine trips		−1.95 ± 0.29	46.3	< 0.001

Estimated marginal means are the estimated mean for a factor level or a factor level combination. Output of the corresponding analyses of deviance for the significance of the model terms
s.e.,standard error

ISSN: 2051-3933