Lab Report on Ventilation and Oxygen Consumption in Fish Essays

Lab Report on Ventilation and Oxygen Consumption in Fish Essays Lab Report on Ventilation and Oxygen Consumption in Fish Paper Lab Report on Ventilation and Oxygen Consumption in Fish Paper Within fish, the counter-current exchange system allows for the efficient extraction of oxygen from the water by the gills. Basically when a fish takes in water, the flow of it is opposite to the flow of blood. As they rush by each other oxygen from the water is given to the blood (metabolic rate is also effected in animals that remain active because tend to consume more oxygen than those at rest). The size of a fish is relevant to oxygen consumption as larger fish consume more oxygen overall than smaller fish. The primary objective of this experiment is to note the effects of temperature on the oxygen consumption and ventilation rates of goldfish. We hypothesize that the ventilation rate of those fish that are subjected to warmer water temperatures versus colder temperatures will have a higher ventilation rate. The Fish in the warm water will consume more oxygen than the fish in the cold water. Overall oxygen will be mostly consumed by the fish that are in the warm water. MATERIALS METHODS Split into groups of two, we were given Goldfish fairly similar in weight. We then transferred the fish to the appropriate jar from the beaker that was used to sigh them and added sufficient amounts of water to fill their capacities. After about 10 minutes, we hastily added the sponges to the jar pushing it halfway down the jar to assure no oxygen had entered the empty spaces between the water and the sponge. We then refilled the jars with the appropriate amounts of water and allowed a small amount to overflow. We then quickly placed the calibrated oxygen probes on and took the initial readings for the ventilation rate (Ventilations per minute), oxygen concentration (MGM/L) and temperature (co) for O minutes. Ventilation rates are in direct correlation with temperature. Graph II. Oxygen Concentration of Group and Class. Warm water shows a trend f less oxygen concentration while cold water shows a higher concentration of oxygen. Graph Ill. Oxygen Consumption of Group and Class. The trend shows that fishes consume more oxygen in warm water, except after the 30 min. Interval. DISCUSSION In Graph l, as predicted the fish in the warm water will have a higher rate of ventilation compared to fish in the cold water. The Class Mean of Ventilation Rates showed an overall significant difference where the fish in warm water has a high ventilation rate than the fish in the cold water. In Graph II, as predicted the fish in warm water used up more oxygen and thus ad a lesser concentration than the fish in the cold water as their body processes slow down and oxygen is conserved itself. There was an error as oxygen concentration increased after 30 minutes for the fish in warm water as some how it seemed as if more oxygen was added in the closed container. The result of the fish in the cold water, as predicted showed that oxygen gradually decreased which itself as the body processes of fish slowed down. In Graph Ill, in general the results showed that both the fish in our group and by the class standard had something go wrong as for the warm fish, oxygen munitions should have remained stable over periods of time, and the oxygen consumption of the fish in the warm water should have over all been higher as the fish in the cold water slow down their metabolic and respiratory processes. In both interpretation of the data, oxygen consumption increased and decreased repeatedly. Meaning oxygen was somehow added to the beaker containing the fish. This error may have happened through individual groups not properly securing that their sponge had no air bubbles within it, before replacing it back into the beaker with the water. This may have possibly been responsible for the Geiger concentration of oxygen therefore interfering with our results. Also for every group their opposing fish in similar weight, were not identically the same size, each fish was a mere estimate one another. This may have tempered results as fish that are generally larger in size consume more oxygen. As a fish ventilates, it absorbs oxygen and within a closed chamber (as conducted by this experiment) the amount of oxygen present decreases. Metabolic rates depend on temperature. As temperature increases the rate of oxygen consumption increases too, although an increase in temperature demands efficient amount of oxygen. ABSTRACT Oxygen is just as fundamentally vital for fishes as it is for the well-being of Humans. In this Lab we examined if varying the temperature of the water had caused a change in the ventilation rate and oxygen consumption of Goldfish. In this experiment we hoped to demonstrate the effect of temperature variance on the ventilation rates of Goldfish. This was done by having two fish (similar in weight) respectively placed in tanks of differing water temperature. One tank filled with water 25 degrees Celsius (room temperature) and another tank with eater of 15 degrees Celsius. We then measured ventilation rate and oxygen consumption. The results showed that the fish placed in the warmer water had a higher ventilation rate than those that were placed in the colder water. They also expended more oxygen having lesser concentration than the fish in the colder water. There is however, a probability of error. Firstly, because our fish were not completely identical in weight and secondly, when placing the sponge into the jar containing fish there may have still been oxygen bubbles within it that may have manipulated our results.