An Isopod - An Isopod's Substrate Preference By Meagan Mowles BIOL 123-503 In an experiment to test innate behavior and orientation in terrestrial

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An Isopod’s Substrate Preference By Meagan Mowles BIOL 123-503
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In an experiment to test innate behavior and orientation in terrestrial isopods, different lab groups in Biology 123 were assigned different variables to test. My lab group was assigned substrate. We used six terrestrial isopods and a three-chambered choice chamber. We picked potting soil, sand, and vermiculite for our substrate variables. With the three different types of substrate in each choice chamber, we placed two terrestrial isopods in each also. We recorded how many terrestrial isopods were in each chamber at thirty second intervals over the time period of ten minutes. We found that the majority of the terrestrial isopods found comfort in the potting soil the majority of the time. In conclusion, the terrestrial isopods overall prefer potting soil as a home base, but also enjoy venturing out into the different substrates; this behavior prevented a positive taxis. Terrestrial isopods are land dwelling crustaceans, commonly known as sow bugs or pill bugs (or roly-poly). They are related to lobsters, crabs, and shrimp and terrestrial isopods breathe with gills. While they look similar, sow bugs are different from pill bugs. Pill bugs will curl into a ball when threatened whereas sow bugs will attempt to flee. Orientation is a process by which animals position themselves with respect to spatial features of their environments. Taxis involves
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This note was uploaded on 03/26/2008 for the course BIOL 123 taught by Professor Sukumaran during the Spring '08 term at Texas A&M.

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An Isopod - An Isopod's Substrate Preference By Meagan Mowles BIOL 123-503 In an experiment to test innate behavior and orientation in terrestrial

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