Table 3 GLMM results for the factors affecting the likelihood that a male would share the item with the female after each choice. Coefficient estimates and their associated SE are shown for significant terms.

From: Male New Zealand robins (Petroica longipes) cater to their mate’s desire when sharing food in the wild

 

Wald Z

P

Estimate

SE

Female < 4 m from platform

5.104

3.33 × 10−7

1.3800

0.270

Days pre/post incubation

4.143

3.43 × 10−5

0.0789

0.0190

Choice sequence

2.229

0.0258

0.1549

0.0695

Pre-fed

0.329

0.742

  

Condition

−0.009

0.993

  
  1. Data were fitted with binomial error structure with a logit-link. The model included the following fixed factors: the distance of the female from platform during a choice (‘1’ when female <4 m away, ‘0’ when female >4 m away; 0 set as reference), the number of days the trial took place pre/post female incubation onset, the sequence of choices within the trial (1–6), the food pre-fed to female and the condition. We fitted male ID as a random factor to control for repeated measures (estimated variance component ± SD for male ID = 0.122 ± 0.349).
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