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An essay about fish farming
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Salmon Farming
If you recently ordered salmon off the menu of your favorite restaurant, or purchased it from your local grocery store, chances are it was farmed. According to “Salmon of the Americas, an organization of salmon-producing companies in Canada, Chile and the United States, 70 percent of the salmon produced in British Columbia and Washington comes from salmon farms. If it weren’t for these farms, we would not have the luxury and abundance of this delicious and healthy food available to us year round. Salmon farming represents one very important way to feed the world and people want to eat more salmon and seafood- more than can be caught.
Salmon farming began over 30 years ago and has become a huge industry. Experts say it’s the fastest growing segment of agriculture. Salmon farming plays an important role in the economies of many areas as well. Jobs and other economic benefits contribute to the value of salmon as much its role in good nutrition. Salmon is an oily fish rich in omega-3 fatty acids, a substance that almost certainly helps protect against heart disease and may also reduce the risk of cancer and Alzheimer's.
There is one species of Atlantic salmon and five species of Pacific. Atlantic salmon account for almost 95 percent of the farmed salmon produced, and most of them are farm-raised on the pacific coast. Pacific species account for all of the wild salmon caught in the Americas and some of them are also farm-raised. No wild Atlantic salmon are fished commercially in North America, as they are an endangered species. Atlantic salmon have become the species of choice to raise on farms because they are more adaptable to the farming techniques and make better use of feed so they produce more salmon with less feed.
Not everybody agrees however, that farmed salmon raised in net pens are healthy for the environment or for you to eat. Over the years, there have been numerous stories in the media that have pointed out the negatives of farm raised salmon. These arguments have ranged from wastes from salmon farms, the spreading of disease from farmed to wild fish, the negative impacts of farm raised fish escapes and interacting with native fish, and recently, the effects of farmed salmon consumption on human health. The latest issue that the media got there hands on and consequently got the public concerned, was a report that polychlorinated...
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...sk for cancer. There is no need to be alarmed with high levels of contaminants when it comes to consuming any kind of salmon. What we do need to be alarmed about is the media reporting and their level of contaminants!
Ronad A. Hites, Jeffery A. Foran, David O. Carpenter, M. Coreen Hamilton, Barbara A. Knuth, Steven J. Schwager (2004) study: Global assessment of organic contaminants in farmed salmon, Science 303:226-229.
Centers for Disease Control and Prevention, National Center for Environmental Health
Health Studies Branch
Kevin Amos, National Aquatic Animal Health Coordinator, NOAA Fisheries
Salmon of the Americas SOTA is an organization of salmon-producing companies in Canada, Chile and the United States whose mission is to improve health, awareness and dining enjoyment of consumers in North America by providing timely, complete, accurate and insightful information about salmon on behalf of the member companies.
Ashley Dean, Shwartz,.Mark 2003. Salmon farms pose significant threat to salmon fisheries in the Pacific Northwest, researchers find. Stanford University
American Journal of Clinical Nutrition, April 2002, 76:608-613.
Pediatric Research, 1998, 44(2):201-209.
In the past, because the glaciers disappeared slowly can make people have a low temperature, clean water during the summer, but at the same time the salmon begin and end their lives. With temperature getting warmer and our glaciers melting, every stage of salmon’s life cycle is getting hurt.
The PBS documentary begins by explaining the normal life cycle of salmon, focusing primarily on the sockeye salmon population. This Pacific salmon once was found abundantly in the Columbia and Snake River, but as rivers were straightened and dams were built to meet the needs of population growth the fish population has diminished by the thousands.
The stories of each fish flow together as each story shows how humans have pushed to gain more control over the ocean and the delicious animals that swim in it’s depths. Greenberg starts in the free-flowing rivers where salmon are commonly found. It is there that early humans of the Northern Hemisphere most likely began their infatuation with fish. Greenberg puts it as, “It(salmon) is representative of the first wave of human exploitation..” (170) Once Europeans learned to fish, they had the ability to fish in shallow ocean water which is where sea bass are usually found. Later, fishermen s...
Rosenau, Marvin Leslie, and Mark Angelo. Conflicts Between Agriculture And Salmon In The Eastern Fraser Valley / Prepared By Marvin L. Rosenau And Mark Angelo. n.p.: Vancouver : Pacific Fisheries Resource Conservation Council, c2005., 2005. UFV Library Catalogue
The salmon are all sterile females which are grown in contained land-based systems, therefore they will not be able to breed among themselves or with other fish. So it is unlikely that the fish will have an impact on wild populations.
"A Sustainable Harvest." Department of Fisheries and Aquaculture. Government of Newfoundland and Labrador, 10 May 2011. Web. 25 Mar. 2012. .
Generation after generation gathered food off the land, people are continuing to practice this in our modern world today. Societies expressly continue to gather their own food as it provides an inexpensive, delightful tasting meal. One of the techniques of our historical past that is still in use today, that has been used for generation after generation is “netting” fish. Netting is a classic technique that has not faced as many revisions to its practice. It persists from one generation to the next due to the fact, that many do not understand it to be harmful to the environment; others may enjoy the idea of letting commercial fisheries catch large numbers of fish as it continues to keep some of Americans favorite meals low cost. Devastating fall out from neglectful thinking about netting will occur in the future if preservative action toward this way of life is not taken. Minimizing the use of nets in waterways will ensure salmon and other fish survive for many more generations to come, allowing this plentiful food source given to us by Mother Nature to be exploited and enjoyed by our future kin. With food sources now readily available, fishing with nets should be reevaluated as follows; who is allowed to fish with nets, what are their purposes, and how will this effect tributary fishing populations.
Not all fish caught are utilized as food for humans. Popular supplements such as Omega-3 are derived from commercially caught fish. In addition to that daily usage products like fertilizers, cosmetic ingredients, vitamins, gelatins and even pigments can all be prepared from by products of fish that has been commercially caught.
Pinkish in color, with spots on their eight fins and back, thin long body with an average weight of 23 kg and length up to 76 cm, and a distinct back fin called the adipose fin. They are saltwater fish which spawns in fresh water, travelling over 20,000 kilometers in the ocean with speeds of up to 50 km per hour. They can jump more than four meters to climb waterfalls and any obstacles they encounter in the water. The Northwest Salmon is one miraculous fish. However, Northwest Salmon are now on the verge of being protected under the Endangered Species Act due to their dramatic decline in their population in the Northwest region of the United States. Their declines in numbers are causing great problems for their surrounding ecosystem, those that rely on the salmon as a food source, and the fishing industry. All of which humans are contributing to all these by overfishing, either commercial or for sport, and the construction of dams on major rivers. Then with the attempt to fix this problem, fisheries, or farms for fish, end up genetically changing the fish and making them more vulnerable to predator fish. Predator fish that are nonindigenous to the rivers the salmon swim in. Eating the salmon’s food or in most cases, eating the salmon themselves. If all of these acts continue at full force, I predict that the Northwest Salmon will not be naturally running up and down our American rivers within the next 50 years if not everyone is totally aware of their situation.
The Tragedy of the Salmon The United States Pacific Northwest has historically been a significant player in the global fishing industry. However, over the last half-century, the fish population in the area has been declining at an alarming rate. Popular species of fish such as cod and salmon have been particularly susceptible to these decreases. What once was a region flourishing with abundant fish populations, is now in danger of being exploited to the point of extinction of certain species. The majority of these population drops is attributed to increased industrialization and overfishing in the region.
Evidence provided to support these claims of human and wildlife harm is largely from laboratory studies in which large doses are fed to test animals, usually rats or mice, and field studies of wildlife species that have been exposed to the chemicals mentioned above. In laboratory studies, high doses are required to give weak hormone activity. These doses are not likely to be encountered in the environment. However the process of bioaccumulation can result in top-level predators such as humans to have contaminants at levels many million times greater than the environmental background levels (Guilette 1994). In field studies, toxicity caused by endocrine disruption has been associated with the presence of certain pollutants. Findings from such studies include: reproductive disruption in starfish due to PCBs, bird eggshell thinning due to DDT, reproductive failure in mink, small penises in alligators due to DDT and dicofol (Guillette 1994, Colburn et al 1996). In addition, a variety of reproductive problems in many other species are claimed to be associated with environmental contamination although the specific causative agents have not been determined. One recent discovery that complicates the situation is that there are many naturally occurring "phytoestrogens", or chemicals of plant origin that exhibit weak estrogenic properties.
However, Japan, one of the first countries to develop salmon hatchery program, as well as, an extensive aquaculture program receives the major credit for Japans eighty percent overall salmon production in the 1990’s. Moreover, this form of aquaculture is a principle source of fish not only in the United States, but also globally with China, now being the world’s largest producer with fish. Although, the practice of salmon aquaculture were thought to have developed via the Danish system of raising rainbow trout in freshwater
Zohar, Y. (2010, September 22). Genetically modified salmon is fit for the table. Retrieved from articles.cnn.com/2010-09-22/opinion/zohar.genetically.engineered.salmon_1_fish-and-seafood-wild-stocks-wild-atlantic-salmon/2?_s=PM:OPINION6
Introduction Canned tuna quickly grew into one of the most popular seafood products in the United States due to low cost, and its source of protein; making it number two in the top ten consumed seafood products (Campling et al. 2007). The 'Secondary' of the 'Secondary' of the 'Secondary' of the 'Secondary' of the 'Secondary' of the 'Secondary' of the 'Secon Harvesting of the canned tuna species has raised significant ecological issues and concerns related to economic and environmental sustainability (WWF n.p). Types of Canned Tuna Species There are five main commercial tuna species: Albacore, Yellowfin, Bluefin, Big Eye, and Skipjack. The most commonly canned species though include the Albacore Tuna, the Yellowfin tuna species, and the Skipjack tuna species (Canned Tuna, 2014).