University of Minnesota

Ecology Fair University of Minnesota Monarch Lab

Abstracts from Immaculate Conception School 2004

Immaculate Conception School
4030 Jackson St NE
Columbia Heights, MN 55421

Year: 2004
Teacher(s): Kristie Rieger

Do Different Types of Light Affect Larvae Growth?

Brian S

I was trying to find out if larvae grew faster if they were exposed to regular light or black light.  My hypotheses were as follows: H1 - Larvae will grow faster in regular light; H2 - Larvae will grow faster in black light; H3- Larvae will grow faster in normal conditions; or H-null - The type of light will not affect larvae growth.

First I separated the larvae into three groups (normal conditions, regular light, and black light). I took the average weight of the larvae in each group. Then, at 7:00am, I put each group under the proper lights.  At 4:00pm, I removed them from underneath the lights. Finally, every two days I weighed them. I repeated the above steps until each larva formed a chrysalis.

In my results, I found out that larvae in the regular light grew faster. Furthermore, only the larvae in normal conditions survived. There was not a large difference in the average weights of each container, so my results supported my null hypothesis. 

Do Monarch Larvae Eat Strictly Milkweed?

Antonio M

   My purpose was to see if monarch larvae only ate milkweed.  I had many hypotheses: H1) The larvae will not eat different leaves. H2) The larvae will eat different leaves. H3) The larvae will eat both types of leaves.

   My procedure was very simple.  I collected different types of leaves and saved yogurt containers.  I put two larvae in each container.  I labeled the containers with the names of the leaves.  One container was given milkweed leaves. 

   My experiment didn't work as well as I thought it would.  Some of the larvae died on the second day and one of them started to eat the other larvae.  My results supported my first hypothesis, because only the monarchs that ate milkweed survived.

Do Monarchs Develop Better Alone or With Other Larvae?

Monica D

   My purpose was to find out if monarch larvae develop better alone or with other larvae.  My hypotheses were as follows: H1 - Monarch larvae develop better alone. H-2 - Monarch larvae develop better with other larvae. or H-null - The surroundings of the larvae will not change development.
    In order to do this experiment I got monarch larvae.  Next I put one larvae into one container and twelve in the other.  I measured the larvae on a gram scale every Monday, Wednesday, and Friday for one week. 
    My results showed that on the first day they had the same average weight.  The next day the larvae in its own container weighed more.  On the third day, I also found that the larvae in its own container weighed more.  My results supported my first hypothesis, which stated that larvae develop better alone.

Does the Type of Light a Cricket is Exposed to Affect How Often it Chirps?

Danielle G

   I am trying to figure out when crickets chirp most. Do they chirp more in pitch black, black light, or the normal day and night?  My hypotheses were: H1-I thought that crickets chirp the most in black light because the new lights would affect their behavior; H2-I also thought that crickets would chirp the most in normal light because it's their normal lighting; H3- I also thought crickets would chirp most in pitch black because you hear crickets chirp more at night than you do in the day; or H-null- The light would have no affect on the crickets, and the results would be the same for all.

   For my procedure I bought several crickets, got them situated in their cages for a couple days, set them up in their assigned lighting, and observed them for a few days. I thought of the idea when school first started because I would hear the crickets chirping in our backyard every night.

   I found that my results supported my final thought, or null hypothesis, because the only crickets I heard were the ones in the normal lighting.  I only heard them twice, so it is not enough data to support my second hypothesis.  The crickets never chirped in the morning, but both times they chirped it was after school. In this experiment, I discovered that the crickets that were in the blacklight turned a see-through color and the ones in pitch black walked funny and their cages molded.

How do Different Lights Affect Monarch Larvae Growth into a Chrysalis?

Kyle M

   The question I am trying to find out is if different lights affect monarch larvae growth into a chrysalis.  I feel that the Ott-Lite will have the greatest affect on the development of larvae into a chrysalis.  I feel that way because the Ott-Lite best resembles the sun rays and its light patterns.  The one that I feel will have the least affect on the development of larvae into a chrysalis  is the black light.  I feel this way because when a black light gives off light it gives off lots of heat energy too.  The heat energy from the black light may cause the larvae to die.  The larvae could also change color or get deformed in the process of this experiment.

   I received twenty monarch larvae and bought four different sixty watt bulbs; a black light, a fluorescent light, a regular bulb, and one Ott-Lite.  Then I used four of the same light fixtures to hold my bulbs.  Next, I put four larvae into each container and labeled the containers; A is the control (sun), B is the fluorescent light, C is the regular bulb, D is the black light, and E is the Ott-lite.  Then I put black construction paper around the five containers so no other light could come through besides the light that I was testing.  Next I put a timer on from 7 a.m through 7 p.m.  I made a journal entry everyday to record my findings.

   In conclusion, I have found that the 60-watt bulb was the one that made the monarch larvae develop into chrysalis the fastest.  I also found that my feeling about the black light was correct.  The black light actually deformed the larvae and made one of the larvae die because of the immense heat that was put upon them.  In my experiment what I found interesting was that the black light deformed one of the butterflies that came out of the chrysalis (you can see this in figure A).

How does Sound Affect the Amount of Food Monarch Larvae will Eat?

Danielle M

   I am trying to find out if sound affects how much monarch larvae will eat.  My first hypothesis is that the monarch larvae will eat more with sound.  My second hypothesis is that they will eat more without sound.  My null hypothesis is that sound would not affect how much the larvae eat.

   First, I labeled the containers (SO, N, SI).  Second, I made my data collection table.  Next, I put the container SO by a noise that resembled birds chirping.  N was placed where it could hear the noises of everyday life.  SI went into my room, which was the quietest place I could think of. I observed the monarch larvae until they became chrysalis. Finally, I analyzed the data.

   Sound did not appear to affect how much they ate.  My results supported my null hypothesis.  The monarch larvae ate more due to their stages of development then what sounds or lack of sounds they were exposed to.

Music and the Amount of Time Monarchs Stay in Chrysalis

Grant G

    My purpose was to find out if the type of music affects how long the monarch larvae stays in its chrysalis.  My hypothesis was that the type of music would not affect how long the larvae stayed in its chrysalis  My goal was to find which type of music (normal, rock, or soft) would cause monarchs to emerge most quickly.
    My procedure was to take three boxes and put five monarch larvae in the rock box, seven in the normal box, and one in the soft box. The rock box had Linkin Park playing on it, the normal box had everyday sounds on it, and the soft box had Rod Stewart on it. I played the music on the boxes for two hours each day and recorded when the butterflies emerged.
    My results are that the music did not affect the caterpillars.  I knew this because I recorded what time the caterpillars went into their chrysalis. I found that the butterflies came out in approximately the same order they went into their chrysalis.  My conclusion was that I found that my experiment supported my null hypothesis, which was that the music did not affect how long the caterpillars were in their chrysalis.

Temperature and Monarch Larvae

Jonathan J

I did my experiment with monarch larvae.  I wanted to see if temperature would affect their growth.  My procedure included the following steps: 1) Separate larvae into containers A and B, 2) Wait for them to go into chrysalis, 3) When they go into chrysalis, place container A into a warm area, 4) Put containter B into a cooler area, 5) Wait until the chrysalis hatch, and 6) See which ones are larger, or what else may be different among the butterflies.  I found that the butterflies seemed to be the same size.  They also hatched in approximately the same amount of time.  In container B, the cooler room, there was one deformed butterfly.  I did notice that they all seemed small when they first came out, but got larger.

The Best Food for Crickets

Thomas P

My experiment is about crickets and how different types of food affect their weight.   I wanted to see which group gained the most weight.  I thought the crickets eating cereal and fruit would gain the most weight. My setup consists of four jars in an aquarium.  Two of the jars held commercial cricket food.  The other two jars had cereal and fruit.  I cleaned out the jars once each week.  I weighed each of the groups in a plastic bag.  Finally, I put them back in their jars. The results are that the crickets that ate cereal and fruit gained the most weight.  A lot of the crickets eating commercial cricket food died.  Also, I think that the cereal and fruit have more nutrients then the store bought cricket food.  So, if you want heavy crickets, feed them cereal and fruit (cereal and fruit also cost less).

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