The Effects of Temperature on Rates of Metamorphosis in ...



The Effects of Temperature on Rates of Metamorphosis in Vanessa cardui

Rose Park and Laura Chan

Department of Biological Science

Saddleback College

Mission Viejo, CA 92692

In this study, tThe objective of this study was to determine if environmental temperatures could potentially be a contributing factor in the rate of metamorphosis in Vanessa cardui, commonly known as the Painted Lady butterfly. The researchers did this by testing the length of time in days each subject took to progress from the larval stage to the pupa stage as a chrysalis in two groups incubated at different temperatures. The reasoning for this study was that if the subjects incubated at the higher temperature, 27.7(C, it will progressed to the pupa stage at a significantly greater rate than those incubated at the lower temperature, 22.2(C, temperature could be a contributing factor to the rate of metamorphosis. The investigators hypothesized the higher temperature of incubation would yield a greater rate of metamorphosis in V. cardui (already mentioned) than the lower temperature. The hypothesis was tested by recording the number of days for each caterpillar in each test group it took to progress from the larva to pupa stage. The mean number of days it took for the higher temperature group was 11.45(0.65 days ((S.E.M., N=20), while the mean number of days for the lower temperature group was 15.57(0.16 days ((S.E.M., N=24). An unpaired, one-tailed t-test was used and the results rejected the null hypothesis that there is no suggests that there is a significant difference in metamorphic rate between subject groups (p ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download