Fig. 1
From: Musical stimulation in lactating sows affects pre-weaning piglet mortality and maternal behavior
Directed Acyclic Graph (DAG) to represent the effect of musical stimulation on pre-weaning mortality. For the construction of the model, the green and red arrows show the causal and biasing paths, respectively. The green with a triangle mark circle indicates the exposure, the blue with “I” mark circle the outcome, and the blue and red circles indicate the ancestor of outcome and the ancestor of exposure and outcome, respectively. Minimal sufficient adjustment sets for estimating the total effect of Musical Stimulation on Weight Gain: Ambiental Variables, Birth Weight, Diet, Disease, Productive Management.
