The Purpose of the experiment was to see how the temperature of the water affects the rate of breathing of the goldfish. To figure this out we put the goldfish in a battery jar. From there we added ice or warm water to control and change the water temperature. Before doing the experiment My Group predicted that the lower the water temperature is the goldfish respiration will increase. But after doing the experiment we saw how when the temperature was at 9C-12C the Goldfish breathing was decreasing and as we raise the temperature the goldfish started to move more and his breathing was faster.
The experiment we perform was based on varying the temperature of the water in which a Goldfish is swimming and observe how it influences the rate of breathing of the goldfish. During this experiment, we will use two goldfish an experimental fish and a control fish. The control fish will remain at the same temperature. While with the experimental fish we will be changing temperature constantly to see how it’s breathing is affected.
The goldfish will start at room temperature of 20°C. We will check the temperature and record the number of mouth movement, and opercular movements the fish takes for 30 seconds at room temperature. This can be done by observing the opening and closing of the gills.
2. Use an empty beaker or cup to add ice. Place ice inside the battery jar
3. Place a thermometer in the fish’s battery jar and watch as the temperature slowly changes. When the temperature is in the 9°C range, determine the respiration rate three times
4. Raise the temperature of the water to 12° C, when the fish beaker reaches 9°C.
5. Change the ice water to a warmer water until it reaches (approximately 27°C) and repeats the following steps while recording the data on the table
During this experiment, when we tested the experimental fish, in the 9C range we got 0 counts of mouth movements the three times we recorded his mouth movements per 30 seconds, In the 12 C range, we got 17 beats per 30 seconds, and 35 counts per minutes. In the 15C range, we got 26C mouth movement per 30 seconds, and 33 counts per minute. In the 18C range we got 29C beats per 30 seconds, and 58 counts per minute. In the 21C range, we got 43C beats per seconds, and 87 counts per minute. Also, in the 24C we got 35C per seconds, with 69 counts per minute, and 69 counts per minute. Lastly, at 27C we got 51 counts per seconds, and 62 counts per minute. With the Control Fish, in the 10-14 C range, we got 76 beats per minute, with 24C 0 beats in five minutes. In the 15-20 C (room temp) range, we got 126 beats per minute, with 630 beats in five minutes. In the 26-30 C range, we got 140 beats per minute, with 700 beats in five minutes