Slaters Project

2173 Words Apr 5th, 2011 9 Pages
Report on the distribution of slaters in different level of soil pH

Introduction
Slater (woodlouse), Biological name Porcellio scaber, is probably the most common species in New Zealand. They belong to the biological class Crustacea. Their size is about 17mm in length. They have rough exoskeleton and usually in dark grey colour. They have 7 pairs of legs, each pair is attached to the underneath of each thorax segment. Their body consists into three sections: head, thorax and abdomen, these are often fused together so that it is difficult to be sure where each section starts or ends. Most slaters can live for 2-4 years, although most die as juveniles. ➢ Habitat
In New Zealand, slaters are common in spring and autumn as they prefer
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Smooth and seal the cut area with glue-gun or blu-tack. To help slaters to stay at a stress free level, use black ink to colour the whole choice chamber as they prefer low light intensity. 3. On each laboratory tissue paper, trace and cut 6 circles with 8.5cm diameter. 4. Prepare pH solutions in each little bottle. The pH solutions used for the experiment are pH4, pH5, pH6, pH7, pH8, pH9. Use the pH meter to measure all the solution before staring each trial, to ensure each pH level is accurate. Record the data in logbook. If there is some variation in the pH solution, try to use buffer solution or salt solution makes it equality. 5. Put a piece of circle on each dishes and use the drops to measure 1.5mL of each pH solutions. Each of the 5 dishes around the outside will fill up with different pH solution: pH4, pH5, pH6, pH8 and pH9. Close the lids afterwards. The control dish will fill up with pH7. 6. Gather 10 slaters in a plastic bottle then place them into control dish. Close the lid as soon as possible. Check if there are any gaps can allow the slaters run away, if there are, use more blu-tack to seal it. Place a black paper on top of the choice chamber in other to make a dark condition for the slaters. They are more active in dark environment. 7. Start the stopwatch. Each experiment is timed for 10 minutes in total. At every 5 minutes

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