How Different Light Intensities Affect Jellyfish Behaviour
Sir Charles Tupper Secondary
Floor Location : J 157 V
My hypothesis was if I were to shine higher light intensity on moon jellyfish at the aquarium, then their pulsing rate would decrease to reach lower light levels. I emailed the jellyfish department at the Vancouver Aquarium. First I went in to ask questions and figure out the details of my experiment. I then went in another day, into the jellyfish hallway at the Vancouver Aquarium (where they breed and care for the jellyfish at the Aquarium to conduct my experiments. I wrapped the tank with garbage bags to only have the light from the top of the tank (where the light was that was attached to the tank, it had a light dimmer) I then measured the different light intensities with a device provided by the aquarium and found that low light was 1 LUX, medium light was 100,000 LUX, and high light was 210,000 LUX. I then shone low light, medium light, and high light, on moon jellyfish. I counted their pulsing rate every 30 seconds and calculated an average. I did this 20 times for each light level. What I found was that with the lower light level, their pulsing rate increases so they can reach higher light levels, and when I shone the high light on the jellyfish, their pulsing rate decreased to reach lower light levels. This confirmed my hypothesis.