Does a Change in Temperature Affect the Rate of Movement in Woodlice

3674 Words Jan 13th, 2013 15 Pages
The affect of temperature on the rate of movement of woodlice

Aim: The aim of this experiment is to establish whether a change in temperature affects the rate in which woodlouse move. I measured the rate by timing the woodlouse to move a set distance of 20cm, and altered the surrounding temperature by submerging a clear tube in water with different temperatures controlled by a water bath.

Research: It is to be believed there over 3000 different species of woodlice, a total of 42 species have been recorded living in the United Kingdom, although not all of them are native (1). Woodlouse is a crustacean, which fit into the class of arthropods, crustaceans are primarily aquatic animals. It is for this reason that woodlice become
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This experiment was successful as the rate of movement of woodlouse increased as the temperature did; I found this out by observing the woodlouse’s reactions to the heat source.
I repeated this experiment with three different species of woodlice, Oniscus asellus, Porcellio scaber and Philoscia muscorum, I identified the woodlouse using an identification key (3). I found that Porcellio scaber had the largest reaction to temperature change; therefore I will base my experiment on this species. To identify porcellio scaber I answered that it is not found on the seashore, cannot roll into a ball, does not have a dark stripe down its back and is not shiny.

Experiment 1: Effect of temperature on rate of movement of woodlouse by measuring trace left on petri dish

Method:
1. Firstly heat water to 25° in water bath.
2. Place water in washing up bowl.
3. Collect large Petri dish and place into washing up bowl.
4. Take the temperature of the bottom of the Petri dish using a temperature probe and wait until it reaches equivalent temperature of water.
5. When step 4 has taken place, put woodlouse into Petri dish. Then time 15 seconds on stopwatch.
6. Whilst timing record the movement of woodlouse by following it with a marker pen on the lid of Petri dish.
7. After 15 seconds remove woodlouse and record the distance woodlouse has moved by tracing the pen line with a piece of string and measuring the piece of string.
8.
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