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Pill Bug Lab

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Pill Bug Lab Report DESIGN Research Question: Will a pill bug prefer fresh or decomposing tomatoes since both are present in their diet? Background: The Armadillidium vulgare (common pill bug) that we have seen as kids rolling into a ball when disturbed is a crustacea that belongs to an animal group called isopods. Pill bugs are crustaceans that have adapted to terrestrial habitats. According to Koehler (1994), “They are wingless, oval or slightly elongated arthropods about 12 inch in length and slate-gray with body segments resembling armored plates” (p. 1). Pill bugs lack tails and were given the name “rolly-pollies” to further describe their tendency to roll into a tight ball when frightened or in danger. Pill bugs crawl around on their …show more content…
I initially thought that it would have been drawn to the rotting tomato because the pill bugs diet consists of rotting plants and other organic material. I hypothesized that since their diet is predominantly made up of decomposing material as opposed to scarcer fresh vegetables, that they would have spent more time and interacted with the left tomato. Instead, results showed that the pill bug spent 68.33% of its time with the fresh tomato on the right and only 31.66% with the decomposing tomato on the left. I also further observed that while on the right side the pill bug appeared to eat some of the tomato for an extended duration of time during several thirty second intervals in trial 7. From the timed results and observation, it was evident that the pill bug went against my hypothesis and preferred the fresh tomato. There are many things that could have been done to improve this experiment. Primarily, we forgot to do a trial run before our experiment. We should have done a trial run with the pill bug in an empty tray and observed how it moved around the tray and if it was on both sides for an equal amount of time, even when there were not any tomatoes present. Through this we would have been able to identify if the pill bug spent equal time in each sector or if it seemed to favor one more than the other. I also could have done a more in-depth exploration on pill bugs before deciding on what to compare for my experiment. I did not get into the really specific research on pill bugs that would have given me more insight on things they liked and disliked. This way instead of using rotting or fresh it could have been something more tailored to pill bugs like that is not as obvious. Lastly, I would have collected my data differently to get more quantitative data

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