Figure 5 and 7. There is always effects of batches in these types of studies. This is also why we prefer to have several batches, but the main effect should not be biased by the batch effect in the present study, as the main finding are quite clear even in our small data set.
Figure 5 and 7 display the overall causes of mortality for the three batches. However, differences in batches were found. Could this overall causes be biased by this batch effect?