Aquaculture practices involve the breeding and raising of aquatic animals in large nets and cages for the purpose of human consumption (Ackefors & Magnus, 1990). Within these systems, livestock are given specially formulated feeds to promote their growth and antibiotics to reduce the spread of disease throughout the colony. In the 20th and 21st centuries, the outputs of aquaculture stock have increased dramatically as demand for fish and shellfish grows, technology continues to advance, and natural fishery stocks rapidly decline. With the rise in popularity of aquaculture, many people question its safety and environmental impacts. It has been identified that aquaculture systems release massive amounts of pollutants into surrounding waters, …show more content…
One major issue is the impact that escaped farmed fish have on native species. Farm raised fish are genetically distinct from wild species, and may wreak havoc on the genetic integrity of these species through mating. As a result, offspring are not as well equipt to living in the wild, and may be more susceptible to diseases and parasites (Monterey Bay Aquarium Foundation, n.dd). According to a 2003 study, offspring of fish with DNA from wild and farmed parents had a 27%-88% lower chance of survival compared to strictly wild individuals (Naylor, Hindar, Fleming, 2005). Escaped fish can also threaten native populations by introducing new diseases and parasites into wild species, as these ailments are common throughout aquaculture systems. Fishermen in the New Brunswick Bay in Canada report massive losses in native lobster populations, as they are being poisoned by pesticides used to manage sea lice in nearby salmon farming. It was also observed that lobsters are being found in muddy areas further offshore, and sea urchin populations are in decline due to habitat reduction (Wiber, Young, & Wilson, 2012). Native species living in proximity to aquaculture systems are threatened by gene pool alterations as well as diseases and parasites that spread via escaped
Nitrogen and nitrates relate to Hypoxia via the process of eutrophication. Since Nitrogen is a limiting nutrient in most waters, the added input of nitrate causes massive growth in algae. The algae rapidly consume all available N, and once the nutrient is limited again, the alga dies en masse. As the alga decomposes, oxygen is depleted in the water. This lowers dangerously lowers the level of dissolved oxygen in the water, which harms living organisms in the area. Small organisms and organisms that are immobile or unable to escape low-oxygen areas are particularly vulnerable. Hypoxia and resulting “dead zones” are harmful to local fishing and shrimping industries and algal blooms hurt the tourism industry. Hypoxia has lead to a decrease of about 25% in the brown shrimp habitat, forcing shrimping operations further offshore. As the hypoxia issue continues to grow, negative human effects will only increase. Since nitrate runoff from ag. has been proven to be the dominant source of hypoxia, policies could be enacted to effectively deal with “point-source” pollution. This makes enacting environmental policy more easily adapted, possibly included in past policy such as the Clean Water Act.
The Chesapeake Bay plays host to an astonishing amount of plant and animal life, providing much of our fish intake for species that aren’t being overfished. For the species that are being overdrawn, the Chesapeake Bay Foundation is working to restore the populations, and it’s going well thus far. Another theme that is endangering the marine life populations as well as the health of the human population is the massive amount of polluti...
The agriculture industries have affected the marine life due to eutrophication. Eutrophication occurs when human activity water because of the chemicals, nitrogen and phosphorus which run off into the water. Eutrophication results in algal bloom. An algal bloom forms when lots of nitrogen and phosphorus are set inside a body of water which results in an excess amount of algae in lakes, oceans, or streams. The waters can not take in a lot of algae because in can affect the habitat of the animals. It can also affect the population of the sea animals.
One of the sectors facing the largest impact is the seafood industry. Fish products are prevalent in pet food products as well as human diets. Given such a high demand on the seafood industry,
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... ...
British Columbia is the fourth largest aquaculture producer in the world. The province and everywhere else that loves seafood relies on the production of aquaculture. However, many do not know what they get when the glory of farming fish comes with. Salmon is one the most common fish and British Columbia wanted to make sure that who ever wanted it could get tons of it. While global warming has been driving wild salmon stocks up north, British Columbia came up with their own solution, Aquaculture. It was the perfect thing due to the fact, British Columbia has 20,000km of coastlines and 25,000 lakes and many rives and streams to raise fish. This became an advantage to fish farmers and aquaculture heads because the plentiful water allowed them to raise wish in any body of water. The economic benefits came pouring in as fish farmer could grow many fish all year round and have control of it. The salmon in these farms are raised in pens, just like you would see animals on a farm on land. B.C’s fairly clean waters, sparse population and accessibility to roads makes it well suitable for the fish to be raised from hatchlings to harvest. The net pens that held the salmon year round were limited to small spaces, developing some major issues in the ocean’s health and human health. Many have blamed farmed salmon for the sea lice. Sea lice have been depleting lives of many wild salmon as farmed salmon are allowed to escape from their nets into the ocean. Allowing the possible spread of sea lice. Sea lice are crustacean parasites that attach onto both farmed and wild salmon. These parasites do not kill the fish, however they drain the resources the fish need to survive and decrease their ability of swimming. The sea lice also create open abrasio...
The primary areas of concerns entail not only local nutrient pollution into water systems, via waste feed, but feces, as well as, chemical pollution, with chemical and antibiotic treatments, and the spread of diseases via farm escapees to wild fish populations. According to Farmed and Dangerous.org (n.d.), salmon farming remains one of the most harmful aquaculture production systems. due to open net-cages maintained directly in the ocean, hence producing farm waste, chemicals, disease and parasites , which flow directly into the neighboring waters, harming other marine life, such as industry, as sea lions and seals. Furthermore, farmed
With a coastline of over 202,000 km and over a fourth of the world’s freshwater resources, it is no wonder why Canada’s fishing industry is a huge part of its economy.1 Canada exports more than 75% of its fish to over 130 countries worldwide. Many of the 7 million people who reside on the coast depend on the ocean’s resources. In total, Canada’s entire fishing industry is worth around $5 billion a year, being one of the world’s most valuable. However, the coasts have not been treated with respect; overfishing, over consumption, and wasteful practices have deteriorated, not only the industry, but the ecosystems and fish populations. This is a huge global issue; the worldwide collapse of fisheries is projected for 2048.
Many of the methods used in commercial fishing are very destructive to the aquatic systems. Industrial ocean trawlers scrape the bottom of the water, often dragging up the seafloor with them. This destroys the habitat and kills many of the bottom dwelling organisms that are vulnerable to these practices. There is also a large amount of marine animals that are unintentionally caught by the large nets. These animals are considered bycatch, having no value to fishermen and are usually killed. These large fishing vessels also add a significant amount of pollution to the water. Fishing vessels cause oil spills as well as discharging chemical elements and wastes into the water. The thousands of of trawlers that pass through Japanese waters create large quantities of water pollution that can devastate aquatic life by changing the chemical composition of the water and affecting all the organisms that inhabit these
Algae blooms can develop slowly and their effects can be long lasting. The toxicity continues to take its toll on marine life, long after the bloom has dispersed (Edwards, 2013). Algae blooms in the water can contaminate the food supply of marine life and humans, posing health hazards to both (Phlips et al., 2012). The blooms limit the amount of light that can penetrate down into the water; thus, cutting down oxygen levels needed to sustain plankton and sea grass (Phlips et al., 2015). The toxins released by the blooms pass through the gills of fish and lead to death by respiratory failure (Flaherty & Landsberg, 2011). Plankton, seagrass, and fish are not the only marine life affected by the toxic blooms. Larger animals, such as the Florida manatee, are harmed by these algae blooms. Manatees succumb to toxic poisoning from the algae blooms by ingesting seagrass that has been polluted with neurotoxins (Edwards, 2013). Also, coastal birds that feed on fish in algae bloom infested waters are exposed to deadly bacteria levels. It is evident how climate change issues are causing Florida temperatures and rainfall to rise, while spreading the harmful effects of algae blooms (Phlips et al., 2012). A solution must be found to rid the water of this extremely harmful
Our oceans take a large beating every day by the extremely large amount of pollution humans produce. Our society easily dumps their waste into the oceans to dispose of the excessive amount of garbage, sewage, and chemicals, but this small and simple solution is creating an even bigger problem. The way humans dispose of their wastes is causing the death of our beloved marine life. Not only are we killing off our animals, our food source, and our resources, we are also minimizing our usable water. By having a better understanding of the problem on the severe dumping, it will be easier to find ways to help minimize the pollution that is going into the ocean.
Growing food with Aquaponics is more efficient than growing food the traditional soil garden way. In a typical soil garden, growers end up spending hours of their time doing back breaking work on their garden, but not anymore, with Aquaponics the need for any tilling, digging, or weeding is eliminated. Aquaponics combines Aquaculture (Raising fish in tanks), and Hydroponics (Growing plants without soil). The outcome is a working system that provides plants with all the nutrients they need, while using a minimum of space, effort, water, fertilizers, and pesticides. Aquaponics allows farmers to use up to 90% less water than normal farming would use, so instead of watering your soil and having the majority of your water either lost by run off or evaporated by the sun, the water is recycled repeatedly through the system saving farmers hundreds of dollars on their monthly water bills. Also when growing with Aquaponics, much more food can be produced in a smaller space, in some cases growers have produced around twenty times the amount of produce in the same area a soil garden would. In addition, with the closed, controlled environment of the system, the need for the use of any pesticides a basically eliminated. Finally, Aquaponics enables growers to grow bigger, better and more quality produce.
Today's waters are constantly being treated like sewage dumps or trash cans. We use them as garbage cans every day polluting the water more and more. "Pollution is often by way of rivers, drains and outflow pipes." Causing an outflow of sewage into our ocean waters. This is not only affecting the community but also the marine life and other sea creatures living in the ocean." This pollution includes human sewage and domestic waste water, factory outflows of acids and poisonous metals, engine oil from roadside drains and garages, farm chemicals washed off the land by rain, building-site rubble, nuclear waste from power plants, and oil from wells, refineries, and tankers." Stating that most of today's waste is from factory or factory ran products that shouldn't be polluting the water
lines, rope, and plastic nets are being caught in the rutter and the engine, but
Research from the University of California San Diego Scripps Institution of Oceanography said that species in the ocean consume a projected 12,000 to 24,000 tons of plastic every year in the Pacific Ocean (Nall, 2014). Pollution of recyclable materials in the oceans is one of the leading causes of why some marine species are nearing extinction. Many authors of articles and books analyzing this topic tend to agree that pollution of our oceans is a problem. The future of this problem is where their ideas tend to differ. The following four literature reviews attempt to demonstrate and support my belief that pollution is getting worse in the ocean and more marine life ecosystems are being affected, but there are things that we as humans can do to change this. Imagine a world where we didn’t have to constantly worry about the vicious cycle of humans affecting animals and then animals in turn affecting us through consumption.