The Effects of Varying Temperature on the Developmental Rates of

Junonia coenia

By Moreen Curley, Taylor Patterson, & Ryan Harvey

Introduction● Hypothesis: The developmental rate and

metabolic rate of caterpillars will increase as temperature is increased.

http://ookaboo.com/o/pictures/picture/12920369/Common_Buckeye_Junonia_coenia_caterpilla

http://upload.wikimedia.org/wikipedia/commons/e/eb/Junonia_coenia_butterfy_at_the_Butterflies_and_Blooms_exhibit_at_the_Conservatory_of_Flowers_in_GGP.jpg

Junonia coenia (Common Buckeye) ● Range: All parts of U.S. except in

the N.W.● Nutrition: Ribgrass Plantain, Flower

Nectar, Fruit● Life Cycle:

1. Egg2. Caterpillar3. Larva (Pupa) 4. Chrysalis

Why Measure Temperature?-Relationship with Metabolic Rate?

-↑ Metabolic Rate -Aerobic Respiration

-Effects on Development -Cool vs Warm Temperature

Materials & MethodsMaterials:- 10 Junonia coenia caterpillars- 10 O2 & CO2 Sensors- 10 LabQuests- 10 Respiratory Chambers- 3 Holding Tanks- Heat Lamps- Thermometers - Plants, fruit, and sugar water for food source

Materials & MethodsMethods:

-Setup: 3 tanks at different temperatures1) Low tank ~ 20°C2) Medium tank ~ 27.0°C3) High tank ~ 32.5°C

Materials & MethodsMethods:● Experimental: Data collection 3 days a

week from 4/10-4/22● O2 & CO2 levels recorded 15 times every 60

seconds for a total of 3,600 seconds

Figure 1: Developmental Timeline of Junonia coenia at Various Temperatures (°C)

Figure 2: Metabolic Rate with Respect to Temperature Variance in Developmental Stages of Junonia coenia

Experimental Results ● Developmental Rate

o Development was observed at a high rate within the high temperature tank

● Butterflies o Higher metabolic rate with higher temperatureo Highest Metabolic Rate Overall

● Caterpillars o Higher metabolic rate with higher temperature

Discussion and Conclusion ● Metabolic and Developmental Rate are influenced with

temperature● High mortality of the caterpillars in the low temperature

tank, and the Butterflies in the high temperature tank● Issues and Future Suggestions

o Sample Size o Frequency of Data Collection o Time and Temperature Parameters

http://www.groovybooby.com/ingredients-2/

http://www.specialtyproduce.com/produce/Foraged_Ribgrass_Plantain_10214.php

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Smith, Stephen, and Edith Smith. Butterfly fun facts. Web. 29 Apr. 2015. <http://www.butterfly-fun-facts.com/butterfly-species/butterflies-a-e/buckeye-junonia-coenia/>.

Work Cited