Fish Respiration Rate Lab

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The purpose of this experiment was to test the effect of the water temperature on a fish’s respiration rate. My hypothesis was: if the water temperature decreases, then the respiration rate will decrease because there is more dissolved oxygen in cooler water, thus, a fish would have a surplus of oxygen. I then did the experiment to prove this hypothesis. According to my group’s data table, when the fish was placed into warmer water, its respiration rate was 12 gill beats per 20 seconds. However, when the water temperature was lowered, the respiration rate also slowed down to 6 gill beats per 20 seconds. When looking at the class data table, the average respiration rate for fish placed in warmer water was 20 gill beats per 20 seconds, whereas
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