Essay about Salmon Farming

Along with the sheer capability to sustain fish populations and feed the increasing demands of humans, the practice of aquaculture itself is a resource efficient way of producing protein. By nature, fish are able to convert more of their food into body mass than when looking at land animals. For example, farmed raised salmon are one of the most intensively-fed cultured fish, but according to the NOAA, when comparing the ratio of pounds of feed to produce a pound of protein, farm raised salmon has a ratio of 1.2 pounds of feed to produce 1 pound of salmon, which is still lower than the 1.9 pounds of feed to produce 1 pound of chicken (whereas Pork is 5.9lbs : 1lb, and Beef measures in at 8.7lbs : 1lb) (NOAA,

The problem with plastic ending up in the ocean is that marine life is being harmed by the presence of it. A study done on the harbor seals in the Netherlands found that more than 12% had plastic in the digestive system (California Coastal Commission). The list of affected species indicates that marine debris is affecting a significant number of species. It affects at least 267 species worldwide, including 86% of all sea turtle species, 44% of all seabird species, and 43% of all marine mammal species (Save our shores). The problem is underestimated because the marine life that ingests plastic or dies from entanglement often goes undiscovered due to the vastness of the ocean, as they either sink or are eaten by predators before they are discovered (Plastic Debris). The potential harm from ingestion of plastics is not restricted to seabirds. Plastic bags drifting on ocean currents resemble the prey of turtles. There is evidence that their survival is being hindered by plastic debris with young sea turtles being vulnerable (Ocean pollution). Over the past 20 years polychlorinated biphenyls (PCBs) have polluted marine food webs at an increasing rate, and are prevalent in seabirds. Though their adverse effects may not always be apparent, PCBs lead to reproductive disorders, increase the risk of disease and alter hormone levels. These chemicals have a detrimental effect on marine organisms even at very low levels and plastic pellets could be a route for PCBs into marine food

Between 1947-1977 General Electric (GE) dumped 1.3 million pounds of PCBs in the river polluting it and making it hazardous. Polychlorinated biphenyls, or PCBs, are used as an insulator and a fire preventer. They also can cause illnesses, such as cancer. If the fish take in the PCBs and then we eat the fish, we can get sick.

The main intention of this experiment is to distinguish whether the chemical Bisphenol A (BPA) has effects on Atlantic Croaker fish. Samples from Atlantic Croaker were taken from both tributaries, one being a Bisphenol A (BPA) free tributary, and the other being filled with Bisphenol A (BPA). In which data was recorded, analyzed, and had astonishing results. The results displayed that when the female Atlantic Croaker hepatic system were exposed to high dosages of Bisphenol A they showed physical abnormalities

From the San Francisco Bay to streams and rivers of Oregon, salmon populations have been steadily decreasing over the past two decades but more rapidly within recent years. In general, fish populations in the Pacific Northwest region have always fluctuated, but the overall trend continues on a downward slope to extinction. While natural phenomena such as flooding and predators of the food chain do affect salmon populations, human activity poses the greatest threat by far. The four main reasons of salmon plummeting are as followed: Harvest, Hatcheries, Hydropower, and Habitat. It’s clear that water ecosystems and management of human activity threaten salmon as a whole. Whether it’s a bay, river or stream- whatever body of water that contains salmon should be subject to ethics that guide our actions as a part of achieving a better overall environment.

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.

With the influx of human population immigrating to Pacific Northwest Region of the United States at the end of the 19th century, extracting the natural goods of the environment quickly became an issue of sustainability and preservation. In the State of Washington Ninth Annual Report of the State Fish Commissioner of 1898, author A.C. Little illustrates how the extractive actions along many of Washington’s river systems are resulting in a major depletion of salmon species unique to the Northwest. Little’s Report aimed to bring attention to over consumption of this finite resource that was not only intrinsically valuable to many people within the region but was also a very successful economic engine too value to deplete. The booming fishing industry,

Salmon are both an indicator and keystone species to the survival of ecosystems in the Pacific Northwest. A healthy salmon species implies healthy waterways with little pollution, and an abundance of native plants and animals, as well as thriving estuaries that effectively filter pollutants. Salmon are a vital food source for predators, and carry key nutrients to plants surrounding the rivers and lakes where they spawn. Along with environmental stability, a healthy salmon population contributes to a multi-million dollar industry of thousands of workers along the Pacific

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

Industrial agriculture is currently the predominant food production system in the United States. It is distinguished by large-scale monoculture, abundant use of chemical fertilizers and pesticides, and meat production in CAFOs. CAFOs are ‘Concentrated Animal Feeding Operations’, otherwise known as factory farms, which aim to cram as many animals in one space to boost efficiency and profit at the expense of animal suffering and environmental hazards.

Salmon stocks in British Columbia are on the brink of collapse largely because the federal Department of Fisheries and Oceans has consistently allowed too many fish to be killed in commercial and recreational fisheries, according to a new research paper.The high exploitation of stocks – which draws parallels with the destruction of Atlantic cod by overfishing – may be more to blame for the decline of Pacific salmon than global warming or poor ocean conditions, says the study assessing salmon management practices, published today by the Canadian Journal of Fisheries and Aquatic

Cod was once the main commodity and Northern Canada’s economy heavily depended on it. Fish account for 15 percent of global consumption of animal protein, and Newfoundland is no exception (Barkin 2). Cod had been fished in North America for centuries, as it is the perfect commercial fish. They are easy to catch due to the fact that they give little resistance to lines and nets. In addition, they are high in protein. Cod was so huge in Canada that at its peak it was a $500-million-a-year industry

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

Plastic debris is polluting the human food chain. In a 2008 Pacific Gyre voyage, Algalita researchers began finding that fish are ingesting plastic fragments and debris. Of the 672 fish caught during that voyage, 35% had ingested plastic pieces.

PCB’s (polychlorinated biphenyls) and dioxins have been in focus recently as there are concerns that the different structures are appearing to mimic the effects of female oestrogenic hormones. (Gray 1996) These chemicals can cause genetic chromosomal problems and major concerns to the reproductive effectiveness of marine animals. Oil spills and the burning of wood and coal can cause poly-aromatic hydrocarbons (PAHs), which has a negative effect on all wildlife causing genetic abnormalities. (EMCBTAP-ENVIS Newsletter 2002).