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Table 2 Results of the ANCOVA analyses explaining variation in four key fecundity estimates

From: Negative frequency-dependent selection or alternative reproductive tactics: maintenance of female polymorphism in natural populations

  Effect DF F P
-Relative body mass    
  Morph 761 0.78 0.38
  Afreq 758 0.96 0.33
  OSR 762 4.7 0.031
  Mdens 759 0.72 0.40
  Morph*Afreq 756 0 0.98
  Morph*OSR 760 1.1 0.29
  Morph*Mdens 757 1.99 0.16
-Egg mass    
  Morph 516 1.2 0.27
  Afreq 517 9.57 0.002
  OSR 517 20.49 <.0001
  Mdens 513 0.01 0.93
  Morph*Afreq 514 0.11 0.75
  Morph*OSR 515 0.82 0.37
  Morph*Mdens 512 0 0.98
-Egg number    
  Morph 534 1.95 0.16
  Afreq 534 8.48 0.004
  OSR 534 19.22 <.0001
  Mdens 532 0.08 0.78
  Morph*Afreq 534 4.22 0.040
  Morph*OSR 533 0.12 0.73
  Morph*Mdens 531 0.18 0.67
-Clutch mass    
  Morph 515 2.2 0.13
  Afreq 515 4.97 0.026
  OSR 515 33.85 <.0001
  Mdens 514 0.52 0.47
  Morph*Afreq 515 5.59 0.019
  Morph*OSR 513 0.44 0.5083
  Morph*Mdens 512 0.0 0.9976
  1. Explanatory variables include female morph frequencies (Afreq), male density (Mdens) and operational sex ratio (OSR). All four analyses are controlled for variation among populations, years and mating status (see methods). The asterisks (*) indicate tested interactions between two main effects. Numerator degrees of freedom is 1 in all cases, DF in the table refers to the denominator degrees of freedom. Note that egg mass, egg number and relative clutch mass were measured in two successive years and body mass in three subsequent years. Significant results are indicated in bold.