WANTED: ISOPODS!
• 5 - 10 per person
• Look under MOIST (no
wet) rocks, mulch
• Put in a container, air is
good
• Wet a paper towel w/ the
WONDER MOLECULE
• Maybe a slice of potato
• VOILA!! A rolleypolley
house fit for royalty
ISOPODS!
ETHOLOGY
Animal behavior
ETHOLOGY
Animal behavior
Which one?
Observing your pillbug’s
behavior
• How do the pillbugs seem to sense their
environment?
• Are they all the same species?
• Can you tell differences in males and females?
• How many eyes do they have?
• How many legs?
• Do they exhibit any dominance behaviors?
• How do they respire?
• How do they grow?
• What are some stimuli they seem to respond to?
Drawing your pillbug
1.
2.
3.
4.
5.
6.
Determine the relative proportions:
a.
width : length;
b.
height : length;
c.
distance between eyes : width of body;
d.
length of antennae : length of body.
Count the number of body segments.
Count the number of legs.
Locate the eyes.
Label the body parts.
Note the size of the pillbug.
Observing your 10
Put 5 on each side
• Every minute (or .5 min), count and record
how many on each side.
• YOU CAN STILL BE DRAWING
DURING THIS SECTION.
Designing a controlled
experiment
HYPOTHESIS/PREDCTION
• Poor:
I think pillbugs will move
toward the wet side of a choice chamber.
• Better: If pillbugs prefer a moist environment,
then when they are randomly placed on both sides
of a wet/dry choice chamber and allowed to move
about freely for 10 minutes, most will be found on
the wet side.
Designing a controlled
experiment
Experiment
• In a controlled experiment, you
must explicitly keep all variables
constant except the one you are
manipulating.
Designing a controlled
experiment
Experiment
• YOU HAVE your independent
variable given… you must design
and execute a controlled
experiment.
• You may need supplies, get them
from Mrs.. Hobby