Isopod Experiment Essay

Isopod Behavior or the RollyPolly Lab Background Information http://insected. arizona. edu/isoinfo. htm * Definition: any of various small terrestrial or aquatic crustaceans with seven pairs of legs adapted for crawling. * Iso- Greek for “similar to”, Pod- Greek for “foot”. * Organization: Phylum, Arthropoda; Class, Malacostraca; Order, Isopoda * Appearance: 3 main body parts: head, thorax, and abdomen One prominent pair of antennae Eyes Seven pairs of legs (14) Paired appendages at end of abdomen called uropods

Color varies grey to white * Male and Female: Females have pouches at bottom of legs for eggs Males have first two appendages * Immature: Look like adults, except smaller in size. * Food: Omnivores or scavengers feeding on dead or decaying plants or animals. Some may eat live plants. * Habitat: Breath with gills, need a moist environment, under rocks for example. * Predators: Vertebrates and invertebrates. * Interesting behaviors: Pill bugs: curl up into a ball for when feel attacked or insecure. * Impact on the ecosystem:

Positive: food for other animals Negative: can eat and damage plants * Where to find: Under logs, moist leaf liter, in pet food dishes, flower pots (have water), and under stones and bricks. Live in moist and shaded areas. Objectives: * Observe various aspects of a terrestrial isopod * Conduct experiments examining the responses of isopods to various environmental factors * Design and conduct an investigation of animal behavior: will the Isopods prefer a normal wet environment or a wet environment with diluted vinegar?

Hypothesis: The group hypothesis was that the isopods will prefer the normal wt environment, than the diluted vinegar environment? Materials: * Total of 10 sow bugs. (make sure that they are all sow bugs, and not mixed with pill bugs) * Two containers attached. (same size and shape) * A ruler to separate sow bugs from entering the other environment before time. * A stop watch. * A brush to carefully carry the bugs. * Diluted vinegar for one of the containers. * Water for the other container.