Rapid evolutionary responses of life history traits to different experimentally-induced pollutions in Caenorhabditis elegans

Table 1 Comparison of multivariate mixed models including different effects

Effects included within the model	DIC	ΔDIC
For her maphrodite traits
-	−2506.140	-
Environment	−2538.996	−32.853
Environment + generation	−2588.716	−49.720
Environment × generation	−2653.526	−64.810
Environment × generation (no covariance)	445.699	3098.535
For male traits
-	701.020	-
Environment	683.189	−17.831
Environment + generation	631.832	−51.357
Environment × generation	605.585	−26.247
Environment × generation (no covariance)	608.146	2.561

Effect of generation and environment (control, uranium, salt and alternating uranium-salt) on hermaphrodite (i.e. growth and total, early and late fertility) and on male (i.e. growth and body bend) traits, measured between generations 4 and 22 of the multigenerational experiment. We used multivariate mixed models with all the traits included as dependent variables, and compared different models using deviance information criterion (DIC). Left-hand side: characteristics of the fixed effects included in each model (the first DIC value corresponds to a simple model including only replicates as a random effect). Right-hand side: DIC of the model followed by the change (Δ) in DIC value between this model and the previous model that did not include the fixed effect. Except for the models shown at the last line for each sex, covariance between traits was allowed in the priors. In bold: selected models for which ΔDIC > 5, i.e. the model including interaction had a smaller DIC. Replicate effects in these models represent 3.3% and 2.8% of the total variance for traits measured in hermaphrodites and males, respectively.

ISSN: 2730-7182