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The effect of temperature change on the respiration rate of

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Cassie Deger

on 22 November 2013

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Transcript of The effect of temperature change on the respiration rate of

The Effect of Temperature Change on the Respiration Rate of Goldfish
The goldfish (Carassius auratus auratus) is a freshwater fish in the family Cyprinidae of order Cypriniformes. It was one of the earliest fish to be domesticated.
Materials and Methods
Began by filling 2, 1L clear plastic containers with approx. 750 mL of room temperature water.
Four goldfish were placed into each of the containers (container A and container B)
Container A had the control group of the goldfish & container B had the goldfish exposed to the experimental treatment.
Results - Control Group
The temperature of the water for the control group was monitored and recorded at 20 degrees Celsius (room temperature)
Results - Experimental Group
The temperature of the water was altered and monitored at 10 degrees Celsius
Materials and Methods
The temp. of both container A and B was measured with a thermometer & recorded. The respiration rate of each goldfish was determined by counting the number of times one would open and close its mouth. Or by the number of times the operculum contracted.
Breaths were counted in 30 second intervals (4 fish for each trial)
Materials and Methods
Average was taken to ensure accuracy of data.
Ice cubes were added to container B until the temp was dropped by 11 degrees C (then goldfish from container A was transferred to container B)
Respiration rate of the 4 goldfish was again observed and recorded
Dependent variable: respiration rate of the goldfish
Independent variable: temperature of the water
Hypothesis: If the temperature of the surrounding water decreases, then the respiration rate of the goldfish in that water will also decrease
Purpose of the experiment was to observe the effect of different temperatures of water on the respiration rate of goldfish.

Common goldfish are social animals who prefer living in groups
Bubble Eye Goldfish
Materials and Methods
After the first trial, the goldfish from container B were transferred back in aquarium and another four goldfish were then placed into container A. This process was repeated three more times.
As the temperature decreased, the respiration rate of the goldfish decreased as well
Group 1
Group 2
Group 3
Breaths per 30 secs
Group 1
Group 2
Group 3
Once the experiment was completed, it is clear that a change in the temperature has a direct effect in the respiration of the goldfish.
Hypothesis was accepted.
In Carassius auratus, or goldfish, respiration rate is dependent on their metabolism.

Belongs in the aquatic ectotherms category, which suggests their body temperature can be regulated through adaptation of their eating habits or physical, but respiration regulation is also important.

Real life example
A sudden shift in temperature that occurs at night in an office building. A goldfish tank in the room could potentially die; especially in the winter if a near is open. The respiration rate is proportional to the temperature change; as temperature decreases, respiration rate also decreases.
Our experiment proved this to be true.
Factors that could have altered the results

If the fish didn’t remain calm long enough to accurately measure its respiration rate, an inaccurate measurement may have been documented
Before and after experiment, all the fish used were kept in the same aquarium, so it was possible for some (if any) of the fish were diseased.
Some fish may have processed certain diseases or defects that could have already impacted their respiration rates.
Breaths per 30 secs

Ichthyology. (n.d.). California Academy of Sciences. Retrieved November 22, 1993, from http://
ITIS Standard Report - Error. (n.d.). ITIS Standard Report - Error. Retrieved November 21, 2013, from
FAO Fisheries & Aquaculture - Utilization and trade. (n.d.). FAO Fisheries & Aquaculture - Utilization and trade.
Retrieved November 22, 2013, from http://www.fao.org/fishery/topic/2888/en

The hypothesis for this experiment is that if the temperature of the water decreases, then the respiration rate of the goldfish that are in it will also decrease. To test this, the group had a control and an experimental group of goldfish. After we lowered the temperature of the water that the experimental was put into, an observation was made that respiration rate of the fish does indeed decrease. In conclusion our hypothesis was supported and the experiment proved to be true according to our results.
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