Pillbugs Response To Danger Lab Report

884 Words2 Pages

Title: Pillbugs response to danger.

Introduction: In this lab we are testing if pillbugs will ball up the more they are in danger.
Background Information: Pillbugs are terrestrial Isopods which belong to the Class Crustacea. Appearance: flattened or rounded back, seven pairs of legs, sharp – angled antennae. Pillbugs have a set of overlapping gills on their underside. There are 12 different species of pillbugs found in the northern and central United States. However, there are nearly 4000 described species of pillbugs. They are fund in humid areas, compost piles, and leaf litter. They feed on dead vegetation such as wood and leaf litter. They cannot survive below -6.0 C, so they burrow 60 cm below the ground surface to reach safe temperatures. They reproduce during the months of May through September. If the pillbugs are irritated they will frequently exude a thick glue which serves to entangle predators, such as ground beetles, centipedes, and spiders.
Problem Statement: What happens if pillbugs are disturbed and in danger?

Hypothesis: If pillbugs ball up when disturbed, then the more often they are disturbed the more they will ball up.

Materials:
Forceps
10 pillbugs total
2 petri dishes
Timer

Investigation Plan:
1. Obtain 10 pillbugs.
2. Put 5 pillbugs in the first …show more content…

Then they would gradually slow down until reaching a complete stop. They constantly clumped together and tried to climb out of the petri dishes. Periodically, the pillbugs would fall on their backs and struggle to get back on their legs. Some of the pillbugs were small and some were big.

Data Analysis:
Time
(mins) 1st petri dish observation Time
(mins) 2nd petri dish observation
0 3 balled up
Piling on top of each other 0 1 balled up
Pooping
5 2 balled up
Some clear liquid 10 2 balled up
Fighting with each other
10 4 balled up 20 2 balled up
15 5 balled up
Lots of clear liquid produced
20 3 balled

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