University of Minnesota

Ecology Fair University of Minnesota Monarch Lab

Abstracts from Highland Elementary 2002

Highland Elementary
1700 Saunders
St. Paul, MN 55116

Year: 2002
Teacher(s): Eileen Cotter

Chrysalis Development: Light vs. Dark

Adam F, Alex A, Lena F, Xavier B, Emily B, Gabe S

We used 21 chrysalides in our study.  We divided them into groups of 7.  One group was kept in constant light, one group in constant dark, and one group in normal day and night conditions.  We observed and recorded how long it took for each butterfly to emerge from the chrysalis.  We recorded the day and time and evaluated the results.  We wanted to find out whether the amount of light has an affect on the development of the monarch inside the chrysalis.  We found that light appears to speed up the process of development by approximately three days compared to the control.  We also found that dark appears to slow down the process of development by approximately two days compared to the control. We would like to do more experimentation with a larger sample of chrysalis to see if we would get the same results.  We only had seven in each sample group.  We learned how to use the scientific method to design an experiment and we learned how to use variables.  We were able to observe close-up details of each stage of the monarch life cycle.

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