Skip to main content

Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Table 2 LMMs investigating how experimentally changing the social status affects the within-ejaculate variation in sperm design or in total sperm length

From: Social dominance explains within-ejaculate variation in sperm design in a passerine bird

a) Sperm design
Random effects Estimates ± SE   Z P
 Aviary 0   0 1
 Sampling date 0   0 1
Fixed effects   F df P
 Intercept -0.16 ± 1.19    
 Initial statusa   0.19 3, 39 0.90
  Dominant 0.15 ± 0.16    
  Subordinate-1 0.097 ± 0.178    
  Subordinate-2 0.079 ± 0.144    
 Final statusa   0.70 3, 39 0.56
  Dominant 0.181 ± 0.191    
  Subordinate-1 0.011 ± 0.139    
  Subordinate-2 -0.048 ± 0.156    
 Body mass -0.013 ± 0.026 0.10 1, 39 0.75
 Tarsus length 0.056 ± 0.052 1.16 1, 39 0.29
 Initial status x Final statusb   0.33 9, 39 0.96
  Dominant x dominant -0.274 ± 0.243    
  Dominant x subordinate-1 -0.150 ± 0.247    
  Dominant x subordinate-2 -0.006 ± 0.252    
  Subordinate-1 x dominant -0.104 ± 0.290    
  Subordinate-1 x subordinate-1 -0.109 ± 0.238    
  Subordinate-1 x subordinate-2 -0.134 ± 0.241    
  Subordinate-2 x dominant -0.133 ± 0.247    
  Subordinate-2 x subordinate-1 -0.075 ± 0.216    
  Subordinate-2 x subordinate-2 0.018 ± 0.228    
b) Total sperm length
Random effects Estimates ± SE   Z P
 Aviary 0   0 1
 Sampling date 0   0 1
Fixed effects   F df P
 Intercept 3.548 ± 2.802    
 Initial statusa   0.16 3, 39 0.92
  Dominant -0.310 ± 0.375    
  Subordinate-1 -0.517 ± 0.421    
  Subordinate-2 -0.091 ± 0.339    
 Final statusa   0.63 3, 39 0.60
  Dominant -0.204 ± 0.452    
  Subordinate-1 -0.253 ± 0.329    
  Subordinate-2 -0.643 ± 0.369    
 Body mass -0.020 ± 0.062 0.10 1, 39 0.75
 Tarsus length -0.051 ± 0.122 0.17 1, 39 0.68
 Initial status x Final statusb   0.86 9, 39 0.57
  Dominant x dominant 0.044 ± 0.574    
  Dominant x subordinate-1 0.217 ± 0.583    
  Dominant x subordinate-2 0.860 ± 0.594    
  Subordinate-1 x dominant 0.271 ± 0.686    
  Subordinate-1 x subordinate-1 0.304 ± 0.561    
  Subordinate-1 x subordinate-2 1.054 ± 0.569    
  Subordinate-2 x dominant 0.244 ± 0.583    
  Subordinate-2 x subordinate-1 -0.246 ± 0.509    
  Subordinate-2 x subordinate-2 0.132 ± 0.538    
  1. aRelative to subordinate-3 males. bRelative to subordinate-3 x subordinate-3 males. Tests of random effects are based on Wald-Z