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Ecology Fair University of Minnesota Monarch Lab

Abstracts from Carondelet Catholic School 2005

Carondelet Catholic School
3210 W 51st St
Minneapolis, MN 55410

Year: 2005
Teacher(s): Cece Cope

Bon Appetit Monarchs by Bea G, Libby S, Louisa C

Bea G

Which food make the monarch adult heavier:&; 10% honey solution or Juicy Juice We divided a group of ten newly emerged monarchs into two net butterfly towers for the experiment. The average adult fed Juicy Juice weighed more than the average adult monarch fed 10% honey solution.  However, the averages are so close that the difference is not significant and seems to support the null hypothesisThe scales we used were accurate only to the nearest .01 gram and we observed a variation in  weight wing-span among the two groups even at the beginning of the experiment, but we were able to keep other conditions identical in the two cages throughout the experiment.  We learned how to feed monarchs using a sponge soaked in a 10% solution of sugar and we learned that a difference between two averages does not always suggest that a variable makes a difference.


Insect Intruders by Caitlin L

Caitlin L

We wanted to study the interaction between Monarch larvae and other insects in the ecosystem. We separated ten monarch larvae into two containers: five in one container labeled "Bugs" and five on a second identical cage labeled "No Bugs".  In the container labeled Bugs we put an Asian Beetle, a Jumping Spider and a Millipede in with the larvae.  Our results were not significantly different in either container.  Most of the larvae died before reaching maturity but one larvae reached the pupa stage in each container.  We propose that this means predatory bugs pose the same threat to larvae as fungus and bacteria do.  We compared the growth curve and the average maximum length reached in each cage.  One of the uncertainties that affected the accuracy of the experiment were that the predators died after a few days and were hard to replace after the early cool weather .  We also felt that larvae length is hard to measure precisely since they curl and stretch.


Monarch Bonanza by Christian G, Jacob S

What Makes Monarch Butterflies Heavier:  Apply Juicy Juice or 10% Honey Water Solution?  We weighed and measured the length of monarch butterflies in order to state whether or not juicy juice or honey water solution makes monarchs heavier.  We weighed each monarch on a triple-beam balance scale (accurate to the nearest .01 g), and then measured the wingwpan.  Our average growth data suggests that apple juicy juice solution makes monarchs heavier at first but that the average weight gain is greater for honery. For length, on the other hand, neight solution seem to show a significant change.  The data supports the null hypothesis.  Two new things that we learned were that each monarch varied in weight regardless of the solution it was offered.  For example, a monarch may weigh 0.9 g one day while another in the same cage weighed only 0.3 g.  While the average weight gain was higher with honey, the juicy juice fed butterflies appeared to be more active.


Supersize by Katie B, Peter G, Sam M, Kasey F

Katie B, Kasey F, Sam M, Peter G

Will the monarch's eating habits affect their growth?    We used six Monarch larvae, each in a separate cage.  We fed two milkweed leaves per larvae to three of the larvae and one milkweed leaf per larvae  to the other three larvae each day.  The purpose of our project was to find out if the number of leaves each larvae is fed has an effect on its growth in length.  There was not a significant difference between the average growth of the larvae fed one leaf and the larvae fed two leaves daily.  One of the larvae in each of the groups died before reaching maturity so there were some variables that were not identical in every container, but we kept all conditions the same except the number of leaves fed the larvae.  We learned that when monarch larvae are fed new leaves daily, growth is faster than when fed only every other day but that if you feed the larvae more than they need, they do not overeat.


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