University of Minnesota

Ecology Fair University of Minnesota Monarch Lab

Abstracts from St. Odilia 2002

St. Odilia
3495 Victoria St N
Shoreview, MN 55126

Year: 2002
Teacher(s): Caroline Waskow

Butterfly Buffet

Tricia B, Ellie O

Two butterflies were put in a cage with four different types of flowers to find out which type of flower that the butterflies liked better. We wanted to know which flowers the butterflies liked more so that people can plant them in their gardens. The results were that the butterflies liked the Sedum more than the other flowers. An uncertainty is that the Sedum was higher then the other flowers so that the butterflies may have gone to the highest flower. One of the things we learned that was interesting was that the male butterflies had spots on their wings so now they could be told apart from the females. Another interesting thing was that Sedum has more than one flower one each branch.

Sunshine Giant, Moonlight Midget

Bobby S

Two larvae about the same length and instar, they were placed in two different containers, one was in constant light and one in constant dark. They measured and graphed. This was done to see if it is more healthy for caterpillars to live in dark or light. After all of the observation were completed, the caterpillar in the light was about 3 cm larger than the caterpillar in constant dark. Caterpillar #2 made it all the way to the chrysalis, and caterpillar #1 made it only to the 5th instar. It is unclear why exactly the caterpillar in the dark didnt grow as fast, maybe because the sunlight helps the caterpillars atmosphere become more clear. Its clear that sunlight will help the larvae grow, and the life of the caterpillar should not be tampered with because they are very fragile and delicate.

What's Inside a Pupa?

Emil W

I took five monarch pupae, one twelve hours old, one 36 hours old, one ten days old, one eleven days old and one twelve days old and froze them.  I then cut them in half to make observations.  I did this to see what was inside the pupa at different ages.  I found a reddish brown spot inside a yellowish green liquid at the top half of the pupa, the bottom half of the pupa was different than the top half.  I might have had other observations if I had looked at more pupa.  I want to know what the brownish red spots are.  I learned there are different things inside the pupa at different ages.  At eleven days the legs on the monarch aren't brown when it is inside the pupa.

Wild vs. Captive: A Battle of Growth

Cody E, Michael R

Wild and captive bred larvae were observed and measured every day. The purpose of the experiment was to measure the growth rates of different larvae (captive bred and wild bred). The captive larvae did not grow as fast as the wild larvae. The unknowns were the gender of the larvae and what their growth rate was before the fifth-instar. The mortality rate is extremely high. Also, wild caterpillars seemed livelier and had brighter colors than the captive ones.

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