Sarcophaga Bullata Lab Report

Observing how Sarcophaga bullata Stimulus Changes with Different Light Intensity and Wavelengths
Animal behavior is one of the most basic characteristics of life and its capacity for response to the changing environment. We observed the stimulus which is the reaction to a specific change in an environment, and the response is what is carried after the specific change. Organisms have evolved in behaviors which are grouped into two different groups, learned behaviors and inmate behaviors. Learned behaviors are responses learned by the organism in the course of the experience. Inmate behavior is part of an organism’s genetic capability. In this lab, we studied the locomotor behavior, along with the two different types of inmate locomotor response.
We then set two cups are the end of the racetrack so when the larvae fell they would not fall onto the table. Once we got the racetrack all set up then we set a light at the end of one sides and turned it on to low power. The light had a white filter over it. We set the light back so it was nine foot candles (fc) away from the center of the track. After that we proceeded to place ten larvae in the middle of the track and timed them for two minutes. When the two minutes was up we recorded how many where found on either side of the center line. We repeated this trail four different times. We found that in all four trials that 85% of the larvae went to the high intensity side, the side which had the light, and 15% of them went to the low light intensity side. We hypothesized that the higher light intensity the more active the larvae would be. After looking at our data I would have to accept or hypothesis because the average light intensity for high light was 26.95 and the larvae picked the high intensity side 85% of the
We then set two cups are the end of the racetrack so when the larvae fell they would not fall onto the table. Instead of one light we put one light at each end of the with different color filters over the light. We set the light back so it was nine foot candles (fc) away from the center of the track. Once we got everything set up we first placed the larvae and timed them for two minutes. We first tested green vs. red, then red vs. blue, blue vs. green and finally green vs. blue. Making sure that each different wavelength, we on the opposite side then they started on. We tested the blue and green again just to make sure that our data was accurate. Our data showed that 53% percent of the larvae preferred blue light, 38% preferred green light and 10% preferred red light. We hypothesized that with different wavelengths kinesis will become stronger. After looking at out data I would have to reject this hypothesis, because the larvae were not just randomly moving. They were moving towards the light that was attracted to them most not just random