Fig. 1
From: Time and energy costs of different foraging choices in an avian generalist species
Average proportion of marine trips performed by gulls, against the number of days after hatching of their first egg, plotted separately by sex and between working days and weekends. Bars indicate the standard error of the mean. Lines are plotted for the significant relationship between the proportion of marine foraging trips and the number of days after hatching of the first egg, per combination of sex and period of the week. Predicted values are back-transformed from the logit scale. Size of points is proportional to sample size