Table 1.

Parameter estimates for each of the top models (AICc <2) in the confidence set for male annual mating behaviour (AMB) (Model set 1). Models are ranked by AICc, for each model the number of parameters (k), AICc, delta AICc (ΔAICc) and Akaike weight (Ai) are provided. Below the model-averaged estimates are provided with their confidence intervals (CI) and relative importance. In bold are the parameters with significant (P < 0.001) effect on male mating behaviour. Age and Age2 refer to linear and quadratic age functions respectively, f to inbreeding and Tarsus to male tarsus length. None of the top models included interactions (Age2: f; Age2: Tarsus or Tarsus: f)

AMB models	Intercept	Age	Age2	f	Tarsus	k	AICc	ΔAICc	Ai
Age + Age2 + Tarsus	1.158	2.433	−2.187		0.469	6	444.9	0.00	0.26
Age + Age2	1.092	2.291	−2.158			5	445.6	0.68	0.19
Age + Age2 + f + Tarsus	1.156	2.450	−2.188	−0.353	0.468	7	445.7	0.77	0.18
Age + Age2 + f	1.080	2.300	−2.172	−0.364		6	446.2	1.27	0.14
Model-average est.	1.127	2.378	−2.178	−0.358	0.468
CI 2.5%	0.717	1.608	−3.051	−0.942	−0.035
CI 97.5%	1.537	3.148	−1.304	0.227	0.972
Relative importance		1.00	1.00	0.41	0.58