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Table 3 Results of a generalized linear model of spore load in a randomly collected subsample of eight beetles per experimental block.

From: Complex adaptive responses during antagonistic coevolution between Tribolium castaneum and its natural parasite Nosema whitei revealed by multiple fitness components

Factor Df Deviance Resid. Df Resid. Dev P(> |Chi|)
Null deviance      379 10657902  
Individual mortality (Dead/Alive) 1 8698191 378 1959711 < 0.001
factor(Line) 4 113410.1 374 1846301 < 0.001
Parasite 4 199320.9 370 1646980 < 0.001
Selection 1 77375.2 369 1569605 < 0.001
Line:Parasite 16 191614.9 353 1377990 < 0.001
Line:Selection 4 22822.19 349 1355168 0.303
Parasite:Selection 4 139426.9 345 1215741 < 0.001
Line:Parasite:Selection 16 146398.9 329 1069342 0.013
Results of post hoc contrast analysis of spore load
  Within host (coevolved lines) Within parasite (coevolved lines) Within host (control lines) Within parasite (control lines)
Line/Isolate Z value P Z value P Z value P Z value P
1 -0.29 0.939 -0.07 1.000 0.48 0.983 0.60 0.982
3 0.47 0.822 0.38 0.998 -0.55 0.973 2.09 0.169
4 0.11 0.998 0.52 0.990 3.02 0.012 -1.21 0.726
5 0.03 1.000 0.04 1.000 1.28 0.618 -0.29 0.999
6 0.56 0.753 0.52 0.990 -0.61 0.961 0.06 1.000
  1. Levels of significance of GLM model fits were tested using analysis of deviance with chi-square distribution. Post hoc test results for contrasts between sympatric and allopatric combinations are shown below. Positive Z values indicate combinations where were local antagonists show higher spore load than foreign antagonists.