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Water Resources - Overfishing

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Submitted By buckeyefever
Words 2030
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Water Resources - Overfishing
Science 275
3/2/10
Kenneth Whitehall

Water Resources - Overfishing In recent decades the method and technologies involved in commercial fishing has advanced tremendously. With a limited time in the fishing seasons, fisheries are forced to catch as many fish as they can as fast as they can. This, along with the growing population of people and their appetites for fish, is causing a major problem with overfishing. Overfishing is the process of catching fish faster then they can reproduce. It is fishing that unsustainably depletes fish stocks or that damages the ocean environment. Overfishing is causing irreversible negative effects within the ocean waters of the earth. Every living thing plays its part in the entire food chain from the smallest of organisms to the largest of animal. From the bottom of the food chain to the top all species are both predator and prey. Every living thing is connected in some fashion and relies on each other to complete the circle of life. When a part of this circle is either in shortage or is missing altogether, there is a break in the chain and everything pays the price in the end. Overfishing has become a major problem in recent decades. The damage that overfishing has already caused in the oceans is still often a surprise to environmental experts. Globally, 90% of large fish are already gone (Festa, Regas, & Boomhower, 2008). As the fishing stocks slowly disappear, commercial fisheries are starting to use bigger boats so they can go out farther and fish deeper to find new fish to support the populations appetite. As these fisheries target their particular species sustainable catching of one species may cause another species to starve because they rely on this particular species for food. Along with overfishing another problem occurs as a result, by-catch. By-catch is loosely defined as catching untargeted fish in the process of catching targeted fish. As by-catch is brought aboard fishing boats they are then discarded back into the ocean
Water Resources - Overfishing either dead or too weak to fend for themselves and they end up dying. Discards is another term used for throwing back unwanted fish. These discards are thrown back for various reasons, they are either a surplus to quotas, the wrong species, considered undesirable, usually too small but sometimes too big, or bad quality. In 1990 about 16 million Bering Sea red king crabs were discarded, which amounted to more then five times the number actually landed (Hagler, 1995). In 1994 Alaskan fishing boats reportedly threw back almost three-quarters of a billion pounds of fish because they were not the targeted fish they were trying to catch (Hagler, 1995). Fish species are not the only things that are affected because of by-catch. Under the heading of by-catch there is also another group that is loosely considered a product of by-catch and that is marine mammals. One of the main sources of problems associated with marine mammal by-catch is commercial tuna fisheries. In the eastern tropical Pacific region these fisheries cast nets 2.5 kilometers long in efforts to catch their tuna as fast as possible. Tuna swim relatively deep in the ocean waters while dolphins tend to swim above these schools of tuna. In the fisheries attempts to catch their tuna they have accidently caught many dolphins. It has been estimated that since 1959 seven million dolphins have perished because they were the product of by-catch using these methods (Hagler, 1995). Dolphins are not the only marine wildlife that are victims of by-catch. Whales, seabirds, turtles, and sharks are a few more examples of such tragic deaths. In the oceans waters of the world huge driftnets are the most common method of fishing. In the Mediterranean Sea these driftnets are up to 22 kilometers in length per vessel. Sperm whales wrapped in these nets have been found dead on the beaches. Thousands of albatrosses are killed
Water Resources - Overfishing annually diving for the bait on the hooks. They get caught on these hooks and drown. In the southern oceans it is estimated that 44,000 albatrosses die annually from getting caught on these hooks (Hagler, 1995). The list of senseless ocean wildlife death from these fishing methods goes on and on. These fishing methods, overfishing, and by-catch are not just affecting wildlife, it is also affecting the entire ocean ecosystem. The affects of overfishing and the methods used to deep sea fish is not just an isolated problem, this is a problem that is affecting the oceans around the globe. Safina (1994) stated "the problem is global. The United Nations Food and Agriculture Organization has determined that all the world's major fisheries are either fully exploited, overexploited, or depleted. The myth of limitless marine resources is just that, a myth." Deep sea trawling is yet another method used by fisheries to catch their prey. These deep sea netting systems are literally dragged across the bottom of the ocean floor at approximately four miles per hour catching anything possible and destroying everything in its path to include fragile deepwater corals. These deepwater corals are homes for many species of fish. Studies have shown that the corals have an extremely slow growth rate. Most of these corals that get destroyed may never recover and those that do could take many thousands of years to completely recover. For the species of fish that make these corals their homes survival is unlikely. Coral reefs are home to 25% of the world's marine fish species, and cover one percent of the Earth's surface, making them the largest single living structure on Earth (EcoSolutions - All About: Coral Reefs. Retrieved March 4th, 2010 from http://edition.cnn.com). More then 80% of the world's shallow reefs are now classified as severely overfished. When corals are under stress they undergo a process known as bleaching. This is when the corals actually turn white and then
Water Resources - Overfishing die. This occurs when there is a breakdown between the corals and the algae that grow on them. The algae on the corals soak up CO2 and sunlight and the corals feed from this. If the corals die so does the algae and this would cause CO2 levels within the oceans to rise because this algae is responsible for processing one-third of all the CO2 in the world's oceans. Not only are coral reefs critical for our oceans ecosystems survival, but they also play an important role to humans as well. Annually humans produce around 25 billion tons of air-borne CO2 emissions. Our oceans are responsible for absorbing around half of these emissions. With the algae in the oceans not able to grow because of the corals dying, there is nothing to absorb this CO2. This would cause the CO2 levels in the oceans to skyrocket. A side-effect to the CO2 levels rising would be increasing levels of acidity in the water. Corals and other creatures ability to form their skeletons relies on the proper acidity levels. Too much acidity would breakdown their ability to form their skeletons properly. Therefore, people need to be concerned about what is going on in the ocean waters. The earth is an intricate machine in which everything that lives on it needs each other for survival. When the chain of survival becomes weak in its links eventually the chain will break, and when the chain breaks it affects everything that it was linked to. To make efforts to prevent this from happening a sustainability plan needs to be implemented. To have an effective sustainment plan that can be properly implemented certain steps must be followed. The first step is to identify the problems, causes, and effects of overfishing along with corrective actions needed to be taken to reverse the effects that this is having on our entire ocean ecosystem. The problems, causes, and effects have been indentified above. The corrective action that will take place is to develop an education program that can be presented to
Water Resources - Overfishing all major organizations involved in protecting the oceans wildlife and ecosystem. Developing this program will take one to two months. The next step of the plan is identifying the order in which the plan will be implemented and they are as follows: 1) Research the problems, causes, and effects of over-fishing. 2) Develop a corrective action plan that will need to be implemented to prevent overfishing and the negative affects it has on the oceans ecosystem. 3) Combine all information in a slide show presentation that can be presented to the organizations involved in protecting the oceans wildlife. 4) Identify and make contact with each organization to set up a time to meet with each organization, either individually or collectively, and present the management and sustainment plan. 5) Once dates have been made identify and invite commercial fisher companies to attend the meeting.
This step of the plan will take approximately three to five months to develop. It is important that all pertinent information is gathered, and corrective programs have been developed. The benefits of this plan will be the restoration of the oceans ecosystem. Our oceans are slowly dying species by species. The implementation of this plan will reverse this action and the oceans will be born again. The plan will save species close to extinction from becoming extinct. Life in the oceans will once again thrive and all will prosper from this. However; along with every positive comes a negative and there will be adversities and challenges along the way. Water Resources - Overfishing Initially most fisheries will protest this plan because it will have adverse affects on their business at first. People will be without jobs and communities will suffer for a short time until the affects of this plan start to show. This will be short lived and once the oceans wildlife begins to grow and prosper people will get their jobs back and communities will reap the benefits of this plan. Once people understand the need for the restoration of the oceans to take place they will welcome the implementation of this plan. This plan will to take more then just the support of the fishing communities and businesses. This is a world epidemic and it will require world support. Every country's government will have to get involved for this plan to be effective worldwide. Support will be needed from every nation and every person. Laws will have to be implemented regulating commercial fisheries on what they can catch, how many they can catch, and when they can catch them. Other methods of catching fish will have to be implemented to reduce the amount of by-catch of untargeted species. Accurate reporting from fisheries will be needed to control these measures. Most of all agencies will need to be put in place to monitor the actions of commercial fishers from large companies to small companies around the world. With the right amount of cooperation this plan can be effective and the oceans can live again.

References
EcoSolutions. All About: Coral Reefs. Retrieved March 4th, 2010 from http://edition.cnn.com/2007/BUSINESS/12/10/reef.canarie/
Festa, David, Diane Regas, and Judson Boomhower. "Sharing the catch, conserving the fish: to end the urgent problem of overfishing, we need a new approach in which fishermen are given a share in--and take responsibility for--a fishery's total allowable catch." Issues in Science and Technology 24.2 (2008): 75+. General OneFile. Web. 4 Mar. 2010.
Haedrich, Richard L. "Deep trouble: fishermen have been casting their nets into the deep sea after exhausting shallow-water stocks. But adaptations to deepwater living make the fishes there particularly vulnerable to overfishing--and many are now endangered." Natural History Oct. 2007: 28+. General OneFile. Web. 4 Mar. 2010.
Hagler, Mike. "Deforestation of the deep: fishing and the state of the oceans." The Ecologist 25.2-3 (1995): 74+. General OneFile. Web. 4 Mar. 2010.
Safina, Carl. "Where have all the fishes gone?" Issues in Science and Technology 10.3 (1994): 37+. General OneFile. Web. 4 Mar. 2010.

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