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Table 2 Effects of age (Age = linear relationship, and Age2= quadratic relationship), sex, stage, species and year on trip characteristics and activity patterns of black-browed and grey-headed breeding at Bird Island, South Georgia. ‘x’ indicates terms retained in the average of the best-supported models for each response variable (full model selection and parameter estimates are listed in Additional file 1: Tables S3 and S4)

From: Effects of age on foraging behavior in two closely related albatross species

Response variable

n

Predictor variables

Intercept

Age

Age2

Sex

Stage

Species

Year

Age: Sex

Age2: Sex

Age: Stage

Age2: Stage

Age: Species

Age2: Species

Sex: Stage

Sex: Species

Stage: Species

Trip duration (days)

158

x

x

x

x

x

x

   

x

x

x

    

Max range from colony (km)

158

x

  

x

x

x

x

       

x

 

Latitude at max range (°)

158

x

x

x

x

x

x

   

x

x

x

 

x

 

x

Landings.hr.−1 in daylighta

66

x

x

 

x

  

x

x

        

Landings.hr.−1 in darknessa

64

x

     

x

         

Wet bout length in daylight (mins)a

66

x

x

 

x

            

Wet bout length in darkness (mins)a

64

x

     

x

         

Prop daylight wet (%)

130

x

    

x

x

         

Prop darkness wet (%)

128

x

  

x

x

x

x

         
  1. a Species was not included in the model for these two metrics as sample size was very small for GHA