1. Are there any external resources that can be used by the mechanism?
Answer: No
2. Are physical changes possible to the mechanism?
Answer: Yes
3. Can other parts of the mechanism be used to minimize the effects of the fault?
Answer: Yes
4. Is the fault due to changes in the environment?
Answer: Yes
5. Can the surrounding environment be changed to adapt to the fault?
Answer: Yes
9) Pink Salmon, Oncorhynchus gorbuscha
Pink salmon can be found in the Pacific Ocean near Canada and the northern states of the United States and then swim inland to fresher water. They can also be found in the northern parts of the Bering Sea (Luna, Susan M., and Armi G. Torres). Salmon have the ability to live in fresh and salt waters.
Salmon are known to swim upstream from the ocean, where they spend the majority of their lives, to the freshwater areas where they lay their eggs. Salmon are known as an euryhaline species which means that it can tolerate a wide range of salt in its environment during different phases of its life which
allows it to migrate (Palmisano, Aldo). The salt level is ultimately controlled by osmoregulation in the body. Osmoregulation is the body systemÕs ability to regulate the water to salt ratio in the body compared to the external environment by using the kidney and gills (Ortiz, Rudy M.). The kidney filters out the excess salt into the urine or helps filter the salt in the body further. The gills are also used to conduct more or less water and salt into the body (Palmisano, Aldo). This control helps salmon from losing to much water and dehydrating or getting too much water depending on the environment.
Luna, Susan M., and Armi G. Torres. “Oncorhynchus Gorbuscha.”Oncorhynchus Gorbuscha, Pink Salmon. Fishbase, 2014. Web. Retrieved February 14, 2014, from
http://www.fishbase.org/summary/Oncorhynchus-gorbuscha.html.
Palmisano, Aldo. “Why Do Some Fish Normally Live in Freshwater and Others in Saltwater? How Can Some Fish Adapt to Both?” Scientific American Global RSS. Scientific American, 19 Jan. 1998. Web. Retrieved February 14, 2015, from
http://www.scientificamerican.com/article/why-do-some-fish-normally/.
Ortiz, Rudy M. “Osmoregulation in Marine Animals.” The Journal of Experimental Biology 204 (2001): 1831-844. Osmoregulation in Marine Animals. The Company of Biologists Limited, 21 Feb. 2001. Web. Retrieved February 14, 2015, from
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