The variable varied tit each group Essay

Fish, being an aquatic animal, has a respiratory system that is different from animals that live on land.

It is capable of breathing underwater, without coming up for oxygen. Fish are able to breathe underwater due to a breathing organ known as gills; which is made up of thin feathery sheets of tissue membrane containing many blood vessels through which oxygen passes allowing fish to breathe (Edmondson 2006). Fish breathe by the process of water in its surroundings entering its mouth.Water enters its mouth by a very effective pumping system that involves the mouth and outer flexible bony flap that cover the gills called the propeller. When temperature changes, a fish breathing rate may either slow down or speed up. If temperature drops, the breathing rate slows down, if temperature rises the breathing rate speeds up. At temperatures below 1 ICC the gill lamellar of goldfish are largely covered by an interrelate cell mass which decreases the functional surface area of the gill.The presence of the ILEC in goldfish acclimated to cold water inconceivable could lead to a covering of the neurotically cells (Taken, Perry 2010).

The respiration rate can be determined by how many times the mouth opens and closes. The main purpose of this experiment was to test the breathing rates of a goldfish in room temperature water, and the breathing rates of a goldfish in ice water. Does temperature affect the goldfish’s breathing rate? The independent variable in the experiment was the thing we manipulated most, which was the temperature, and the dependent variable was the breathing rate because it changed u to the temperature.

The null hypothesis is the temperature does not affect the breathing rate. The alternative hypothesis is the temperature will affect the breathing rate. Two ml beakers were both filled with about ml of room temperature water. Two goldfish were placed in each beaker, as well as a thermometer. The thermometers were placed to keep up with the temperature.

The controlled goldfish was only portrayed with room temperature water, while the variable was subject to change due to ice water.Ice water was poured into the beaker with the variable, to make the temperature drop two degrees Celsius. Room temperature water was poured into the controlled beaker, but the temperature remained the same. Each minute, the steps were repeated except ice water was poured into the variable beaker and room temperature water was poured into the controlled beaker. We timed a minute, to see how many breathe strokes there would be. Considering the control was portrayed with room temperature water, the breathe tropes remained the same or may have differed by a few.The variable’s breathing rate differed tremendously.

As the temperature dropped two degrees, each time the breathing rate would slow down. The variable started out with 92 breath strokes at twenty-two degrees Celsius, and ended up at 25 breath strokes at twelve degrees Celsius. The control start 96 breath strokes and ended Witt 99 breath strokes. Our results showed how quickly fish can adjust to climate change. Based on the graph, the control stayed almost constant, and the variable varied tit each group.

Every group had a decrease in the variables respiration rate. The average of all five trials was a continuous decrease. Fish being a cold-blooded animal take on the temperature of their surroundings and use less energy than that of warm blooded animals which convert the food that they eat into energy to adjust their body temperature (Edmondson 2006). When the fish respiration rate slowed down it wasn’t because it was dying out, it was because it’s a cold blooded creature and it can adjust to any temperature.


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