Skip to main content

Table 1 The strength of female interactions in mate choice trials by species and region with (A) conspecific males and (B) heterospecific males

From: Experimental evidence for asymmetric mate preference and aggression: behavioral interactions in a woodrat (Neotoma) hybrid zone

  Female interaction by male class (trials per bootstrap replicate)
Fixed effect df Time (58–59) Visits (57–59) Affiliation (40–53) Mating attempts (59) Aggression (40–52)
A. With conspecific males      
  Female species* 1 5 12 87 2 75
  Female region* 1 67 32 45 99 86
  Species x region* 1 63 50 61 3 3b
  Male relative massa 1 1 1 24 13 1
  Trial number 1 1 1 . 1 .
B. With heterospecific males      
  Female species* 1 5 5 6 90 85
  Female region* 1 7 24 40 65 99
  Species x region* 1 12 39 30 96 5
  Male relative massa 1 0 3 1 1 36
  Trial number 1 2 1 . 0 .
  1. Random subsampling from all trials created 1000 bootstrap replicates for interactions with conspecific males and interactions with heterospecific males that were statistically independent (see Methods: Data analysis). The values shown are the percentage of times that a fixed effect was significant in the resulting 1000 anova models (italic P ≤ 0.05 in ≥ 75%, bold italic P ≤ 0.05 in ≥ 95%). For time, visits, and mating attempts, female identity was included as a random effect (repeated measures analysis), which was not necessary for the female-averaged responses of affiliation and aggression. In full models, trial number and male relative mass (conspecific minus heterospecific male mass) were included as fixed effects, while reduced models omitted these 2 terms. For all 5 responses the reduced model set produced a better fit than the full model set (based on AICc), hence their percentages are shown (*).
  2. aFor affiliation and aggression, the average relative mass for the 2 sets of males tested with each female.