Oxygen Saturation

Lab Report
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The aim of this study was to see the effect of oxygen saturation on the number of shrimps (gammarus pulex) present within a selected test area. My hypothesis concerns the habitations of aerobic fresh-water species. I believed that as the concentration of dissolved oxygen increases, the number of shrimps present will also increase.


My control variables were the temperature of the water, and the pH level of the water. Other, un-measureable variables included the main food supply and natural predators of the gammarus pulex. The Kick-Sampling method was used in this experiment and was found to be effective in accurately determining the number of shrimps at a specific site. Due to my findings, I have concluded the null hypothesis to be false. The number of shrimps per site is directly related to the dissolved oxygen content of said site.
There will be more gammarus pulex (fresh-water shrimps) present within a fresh-water habitat in accordance with the increase of the concentration of dissolved oxygen. If there is a greater amount of oxygen in the water, which may be affected by organic pollution, then there will be more oxygen available for the respiration of aquatic species living in the stream. As aerobic organisms, the fresh water shrimp require oxygen for their survival. I believe that Fresh-water habitats with greater amounts of dissolved oxygen will attract more gammarus pulex.
This apparatus is used to measure the flow rate of water at different sites of the river Riber Brook. It is needed due to the current preference of the gammarus pulex. This meter will be able to alleviate, or bring to attention, the possible reasons for species diversity.
This spoon will be used to count the ...
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