As the discussion outlines pill bugs may not necessarily move towards a dark area. This somehow opposes the previous finding that pill bugs exhibit a strong negative phototaxis or an attraction to places with very little or not light at all. Moreover, it has been concluded in the study that the locomotory activity of the pill bug is most likely not due to their internal reaction to the effect or absence of light but due to negative masking, or the mere distinct effect of light that one can observe when a pill bug cannot escape the lighted area. Moreover, the attraction of pill bug towards dark areas is somehow not due to their reaction to light but because of their “strongly nocturnal activity under a natural light-dark cycle, more or less controlled by an endogenous timer”.
This paper highlights that external marking agents may also cause an internal effect on the behavior of pill bugs as the marked pill bugs exhibited more hiding behavior during the day and exploratory activities limited to night time. Moreover, marked pill bugs were usually significantly less active due to the mark, and that they have a lower level of feeding. The alleged connection is mostly chemical as “some chemicals from polish and marker might break through the cuticle into haemolymph of pill woodlice'. When it came to their feeding habits, the pill bug spent more time in high quality food patches compared to those with low quality. However, as the high quality food becomes less in amount and the distance between the pill bug and the potential sources of food becomes greater, the pill bug, just like any other animal, will tend to conserve its energy and will tend to feed on low quality food that is currently available.