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  • Essay / Osmoregulation of Brine Shrimp - 871

    Osmoregulation is an example of an organism maintaining homeostasis. Specifically, osmoregulation involves an animal regulating osmotic pressure or its fluid content. Brine shrimp, Artemia, use osmoregulation to regulate saline fluid levels in their bodies. Since brine shrimp live in seawater, an environment with a high salt concentration, they must actively excrete excess salt. Brine shrimp use meteopipodites as the location of the ion pump that secretes sodium. This is active ion transport because it travels against the current of higher salt content outside the body. The following two studies respectively describe the ideal environmental conditions for brine shrimp and the possible genetic explanation for brine shrimp osmoregulation. In the first study reviewed, "Effect of Different Salinities on the Survival and Growth of Artemina Spp," researchers Soundaraparian and Saravanakumar designed an experiment to determine the ideal conditions for the growth of brine shrimp, or Artemina. In the introduction, the scientists note the growing importance of Artemina, as it is now used as a live food for more than 85 percent of the world's cultivated species. Thus, a demand for growing huge quantities of Artemia arose, making this study incredibly relevant. The experiment measured the survival rate, growth rate and size of brine shrimp when they were harvested in various environments. To obtain these measurements, three environments were created: sea water, brackish water and fresh water. For this experiment, the scientists used 5 liter plastic buckets. Every two days, half the water from each bucket was discarded and new water, of each respective salinity, was added to each bucket... middle of paper... incredibly relevant to the world of today. Brine shrimp are also used as test subjects due to their incredible resilience, and are also sold as a "sea monkey" novelty item. Unfortunately, these unique creatures have become endangered in some cases, as water is diverted (for human use) from the highly saline environments inhabited by brine shrimp. As a result, the water becomes saltier and usually leads to an increase in pH, which can endanger the shrimp. The information provided in these two studies shows the necessity, function, means and genetic explanation of osmoregulation. As humans continue to impact the environment, changing salinity will cause a change in the need for osmoregulation and, therefore, future scientists will need to explore how organisms can respond to the need for osmoregulation more or less and how this will impact the survival of populations of organisms. in its entirety.