Salmon : Cause, Causes And Effects Of Overfishing?

One of the most commonly shared beliefs about aquaculture is that it has potential to amplify and transfer disease/parasites to wild fish populations, but strict management practices and guidelines have been utilized and supplemented to ensure that US farming operations mitigate current and potential environmental risks associated with aquaculture (NOAA, 2015). Among these practices are regular diver-led inspections to investigate the integrity of nets and net infrastructure, surveillance cameras and even public webcam feeds that monitor the fish farms and in particular monitor efficient use of feed, regular health inspections in efforts to have a head start on disease prevention and detection, and “comprehensive sanitary and biosecurity programs to prevent the introduction and/or spread of pests or diseases from one farm site/cage to another or into the environment.” (NOAA, 2015). Additionally, movements are being made to stop the spreading of disease and to limit oceanic pollution by containing salmon in solid tanks rather than in netting. “In Washington State, Domsea Farms has launched a land-based, freshwater system to produce coho salmon.” (David Suzuki Foundation, n.d.) This method is not only environmentally sound, but it opens up aquacultural boundaries. By containing fish in these large tanks, there is potential for salmon aquaculture to

Importantly, let's not overlook the effects of salmon population declines on the indigenous peoples of California. Tribes such as the Karuk, Yurok, Wiyot and the Hoopa, to name just a few, have depended on salmon as their main food source for centuries. Salmon was not just food, but central to their religion, their diet, and their overall way of life. Salmon are the cornerstone of their culture (Harling, 2006). The loss of this abundant natural resource must be seen not only as degrading the health of the river ecosystem, but also as severely impacting the health of the tribes.

The earliest accounts of overfishing occurred in the 1800s, when the demand of whale blubber nearly wiped out the whale populations. In the mid 1900s, the harvesting of Atlantic cod, herring, and California sardines drove them to the brink of extinction. These high disruptions cause regional depletions of animal resources which is starting to cause a global problem. There has never been a more urgent time for fishing nations to make a commitment towards the sustainability of our oceans. More than 80% of the world’s fisheries have been, or are being pushed beyond their limits and are in dire need of strict management plans. Populations of fish and elasmobranch fish such as tuna, grouper and sharks have been declining to the point where the survival

As the population on earth increases ,overfishing has become a growing issue in all parts of the world. Fish is a vital food source for many, in the world and counts for many of the cultures and heritages in the world, which means there is a high demand for it . This high demand has caused overfishing to occur. This is a cause for concern since due to the development of better technology, there is a higher risk of overfishing if not managed properly. Canada in particular has been facing the problem overfishing for years now. Due to Canada’s issue of overfishing, the environment and wildlife as well as human settlements all have negative impacts ,therefore a sustainable solution must be implemented. If action isn’t taken, Canada’s issue of overfishing will continue to worsen.

The first Pacific salmon hatchery was constructed on the McCloud river in California in 1872, and its purpose was to produce Chinook salmon eggs that would be distributed far and wide, starting a practice of introducing non-native fish for human enjoyment and consumption that has proven very destructive, both to populations of salmon and other fish species (Maynard and Trial 2013). During this time the main goal of hatcheries was to produce as many salmon as possible, regardless of the carrying-capacity of the effected stream, a practice that was largely motivated by the canning industries who benefitted significantly from increased salmon production. During this period, the natural environments that shaped the development of each salmon run were not only seen as unimportant, but actually detrimental to salmon-production (Maynard and Trial 2013). Current research makes it clear that these factors, which early hatchery managers saw as detrimental, are in fact key to healthy salmon

There are many risks associated with eating farm-raised salmon versus wild- caught salmon. One risk that farm raised salmon faces is contaminants that can lead to cancer. Farm raised salmon are placed in artificially made bodies of water such as ponds, lakes, and salt water and within these bodies of water, contaminants such as PCBs can be present. Cancer causing chemicals can be present in both the water, farm-raised salmon swims in, and the food they eat. Another risk with farm-raised salmon is the use of antibiotics in order to keep the fish healthy. This unknown amount of antibiotics used on the fish can lead to a resistance to the antibiotic used to kill the bacteria’s in both human and the salmon. The humans that are consuming the fish that possess these antibiotics are unintentionally

Chinook salmon (known by its scientific name as Oncorhynchus tshawytscha) is the largest species out of the Pacific salmon genus, with an individual chinook measured over 120 pounds (fishwatch.gov, 2014). Often known by the name as “king salmon”, it is one of the most expensive salmons as this species of the Pacific salmon is not abundant in North America. This salmon is originated in rivers ranging from Central California to northwest Alaska, but can also be found outside the United States such as in northern Pacific countries such as Canada, Russia, and Japan. They often live in oceans, but are spawned and born in freshwater rivers and streams (fishwatch.gov, 2014). According to the NOAA Fisheries, the United States currently has more than 20 stocks within the range between Central California to northwest Alaska. Population ranges varies within region—with rates of decline, growth, and constant of Chinooks in Alaska (fishwatch.gov, 2014), while non-Alaskan Chinooks in the Pacific Northwest are currently facing rates of decline (Peery, Kavanagh, and Scott, 2003). In terms of the current status of endangerment/threatened, it varies within region in parallel with population rate. The Chinook salmon from Alaska are considered healthy and none of them have yet been listed in the Endangered Species Act (fishwatch.gov, 2014). On the other hand, those in the Columbia and Sacramento Rivers are currently face being endangered, while Chinooks living in the California Central Valley

For this project, we are researched the salmon trade and how it has evolved over the years. The salmon commodity chain has three main consumers – the United States, Japan, and China. The development of aquaculture has changed our consumption of salmon drastically over the past decades, with Norway leading the aquaculture industry, and Chile fast catching up. Because of differing standards of farming, the quality of cultivated salmon varies; some farms may use chemicals, while others focus on a sustainable farming process focused on longevity of humans, salmon, and the earth. Atlantic salmon used to overflow waters ranging from Quebec to Newfoundland, all the way southwest to Long Island Sound. Come the beginning of the 19th

According to a study done by Living Planet Report in 2015, 29% of the world’s fishing stocks are considered overfished and an additional 61% is fully exploited with no possibility to produce more fish. Our environment is currently afflicted by a number of different problems, one of which is overfishing. Overfishing is defined by FishOnline as, “Fishing with a sufficiently high intensity to reduce the breeding stock levels to such an extent that they will no longer support a sufficient quantity of fish for sport or commercial harvest.” The overfishing situation is being exacerbated by non-sustainable and destructive fishing practices and unfair fisheries partnership agreements; while there are currently attempts being made at fixing these problems and their effects on overfishing, nothing has been extremely effective.

In contemporary society, human society is progressing rapidly on various fronts. Nevertheless at the same time, the problem of overfishing is becoming increasingly worrisome and attract extensive attention of the society. In this essay, I will address overfishing and propose some possible causes of this phenomenon which can give contribution to some solutions.

When fish like salmon are farmed, often the fish are still kept in the ocean; however, they live inside of nets so that they are still contained. There are many ethical arguments based around these net systems because these nets pose threats to wild salmon. Captive salmon can escape from the nets, which allows them to breed with wild salmon. This can disrupt the natural gene pool of wild salmon. Farmed salmon have been shown to outgrow wild salmon when introduced into the wild, and typically have higher mortality rates, which would be poor traits to be introduced into the wild gene pool, (Hindar, et al., 2006). Unfortunately, with the invasive farmed salmon being introduced to wild populations from escapees of net systems, the recovery of the original wild salmon is unlikely, even if decades went by without more intrusive farmed salmon being present, (Hindar, et al., 2006). Another problem is that the nets do not contain wastes from the captive salmon inside, wastes such as uneaten feed, and feces from the fish are dispersed into the open waters of the ocean. Wild salmon can contract infections and parasites from captive farmed salmon in nets. A study indicated that these parasites, such as sea lice, and infections lead to high mortality rates in wild salmon passing near

Another global effect of overfishing is fish farming or aquaculture. It was first started to help preserve the ocean and hoped to help people to obtain a reliable fish source. Unfortunately, what many came to realize is the downside of fish farming. One example is water contamination, where consequently waste products such as foods eaten, feces and other dead fish, are all dumped into our main water supply which contributes to water pollution. Moreover, chemicals that are used to treat the fish farms like antibiotics and algaecides are all released into the ocean; which is a real cause for concern for our oceans. Fish that come from the fish farms are pumped full of drugs, to prevent sickness in the fish but this is not healthy for us to eat. There is also a great environmental impact which includes the fact that to sustain fish farms, portions of

Many breeds of fish are being captured at a faster rate than they can reproduce. Some species such as orange roughy fishing became popular in New Zealand in the 1970’s. Over time, it spread to many countries around the world. In the last 20 years, there has been a decline in catch up to 75%. It is no longer common to see in grocery stores as well as restaurants. The amounts of fish that are captured and distributed around the world are alarming opposed to the rate the fish can multiply.

According to the United Nations, 17% of fish stocks worldwide are currently overexploited; 52% are fully exploited; and 7% are depleted. This means that only an estimated 20% of worldwide fish stocks are not already at or above their capacity(Seafarms, 2013). Catches of Pacific herring have decreased by 71% since the 1960s, with Atlantic herring catches falling by 63%. Atlantic Cod catches have fallen by 69% in the same time(Seafarms, 2013). These are just a few of many facts and statistics on the topic of overfishing. The effects of these statistics and facts impact people’s and animal's lives around the

Pollution is a damaging with fish farming. A group of wild fishing being fed to fish in the ocean will eventually transfer disease. As well, fish pollute the water from their wastes. Fish farming also affects the growth and genetics of the fish because they are not in a wild environment. More research should be completed to provide more adequate information and prevent negative outcomes for fish farming.