Goldfish Lab

Last Friday we had a very int resting lab in my Biology class. We had to test the respiration rate of goldfish. This was very interesting because we actually got to interact with live animals. My lab partner and I, tested the respiration rate of goldfish at different temperatures.


testHere are our results. The tests resulted in us neglected our hypothesis. We had a high room temperature of 22 degrees Celsius and we lowered it substantially with ice. It was hard to increase the temperature because water has a high specific heat but we got it a few degrees Celsius warmer and tested it. With our 4 fish we realized that the room temperature average was 128 breaths which was good. By taking the average we made sure that our data was accurate.

Screenshot (97)

  1. The fishes respiration rate is obviously affected by the temperature as we can see from the above graph. The higher the temperature the fish’s respiration rate increases while the colder the temperature is, the lower the rate is. This is true because a fish is cold blooded, so it takes on the temperature in the environment. The colder the environment is, the colder the fish is, and the slower respiration occurs.
  2. Their are many other factors that might have affected breathing rate.One of these could be fear or adrenaline which would skew with the breathing rate. With emotions and hormones the breathing rate will change. We tested this hypothesis and saw that the fish breathed much more often when a hand was in the tank.
  3. Our fish respirated less than the average. We should trust the average because it is more accurate. We know the average is more accurate because it takes multiple results into account.
  4. Scientists usually take data and look at the average because it allows them to get the most accurate data. It allows them a way to accurately compile their data. We did this in this experiment to make sure our results were accurate. We also did not have time to test multiple fishes at different times so an average made sure we had accurate data and we did not have to redo the experiment.
  5. We could test to see if light affects respiration. We could test the experiment normally in the light, and then for the other group we could darken the room and see the affect. By looking at goldfish in the dark we could see if light affects respiration.
  6. At the start of the lab we predicted the respiration rate would lower the farther we get away from the room temperature.Our hypothesis was wrong because with a high temperature, the temperature increased and did not decrease.
  7. I already explained this in problem one, but because the fish are cold blooded it’s internal temperature changes depending on the external temperature. The fish reacted this way because when the fish were cold, their metabolic process would slow down and the fish would breathe less. Also cellular processes would slow down so the fish would breath less.

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