Table 2 Female solicitation had a statistically significant positive effect on whether a copulation occurred (N = 381 mating attempts).

From: Male age is associated with extra-pair paternity, but not with extra-pair mating behaviour

 

estimate (lower CrI to upper CrI)

Fixed effects

(intercept)

−1.32 (−1.98 to −0.62)

solicited

2.45 (1.88 to 3)

extra-pair

−1.87 (−3.45 to −0.28)

male age

−0.03 (−0.36 to 0.30)

male age2

−0.05 (−0.41 to 0.29)

solicited * extra-pair

1.84 (0.01 to 3.65)

aviary B

−0.27 (−1.04 to 0.54)

aviary C

0.16 (−0.98 to 0.57)

aviary D

−0.19 (−0.98 to 0.56)

Random effects

male ID

0.17 (0.12 to 0.23)

female ID

0 (0 to 0)

  1. In the absence of female solicitation, extra-pair copulations were statistically significantly less common than within-pair copulations. Results are from a GLMM with a binomial error distribution (logit-link function). Female solicitation (“solicited”, “unsolicited”) and pairing status (“within”- or “extra-pair”) were categorical fixed effects as well as the interaction of female solicitation and pairing status. Male age was centred and scaled and the outcome variable was a binary response of a mating attempt leading to copulation (“yes”, “no”). We show the model’s posterior means and CrI. CrIs interpreted as statistically significant are in bold.
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