Isopod Lab Report

Introduction: Isopods are crustacean, which is split into smaller groups, called order. Scientifically Isopoda order is called isopods, which include pill bugs and sow bugs (Crustacean class). Most of the time isopods are mistaken for “bugs” since they look like insects. Even though they are closely related to crustaceans, their bodies are particularly similar to crab and other sea creature with shells. The isopods have three distinct regions such as the head, thorax and abdomen (CISEO). Their characteristic as for what they look like is their claws attached to their abdomen. Also, they have a pair of antennae, simply small eyes and seven pairs of appendages connected to their segmented thoracic region. They are differed by their stomach

Using the 0.1 M stock solutions of sugar, a 0.01 M dilution was created for each sugar type by adding water to the stock solution 9 out of 1. A 20 mL dilution was made for each trial. The same volume of each solution (10 mL -5 mL ) was added to the green sponges to create four group; Group 1: Sponge with 10 Ml 0.01 M glucose solution, Group 2: Sponge with 10 mL 0.01 M fructose solution, Group 3: Sponge with 10mL 0.01 M sucrose solution, Group 4 (Control): Sponge with 10 mL water. The four sponges were placed every 90 degrees on the edge of the arena. The isopods were placed into their environment for one to two minutes to acclimate with the environment. Once acclimated, the isopods walked around the arena for five minutes and go to the sponges that they preferred. The experiments should be repeated 3 times with the same design layout for accurate results. 20 isopods were released in the center of the arena. After five minutes, the number of isopods behind every sponge was

This behavior was observed in all the three experiments and through the period of observation, isopods seemed to move to different sponges before they settled down behind one of them. The χ2 value was 0.03842932, df was 3 and hence the P value was less than 0.001 which proves that this result is not a result of random probability and is in fact significant and reliable. In Trial 2, the hypothesis was that most isopods would go to the sponge with sucrose solution and our hypothesis was proved correct through the experiment. It was observed that a majority (55%) of the isopods preferred sucrose relative to the other sources of moisture. The χ2 value was 0.012858, df was 3 and hence the P value was less than 0.001 which proves that this result is not a result of random probability and is in fact reliable. In Trial 3, twelve isopods (60%) made the choices of hiding behind the sucrose sponge. The χ2 value was 0.00350342, df was 3 and hence the P value was in between