The Pacific Bluefin Tuna Is An Valuable Valued Specie

Besides the species being highly endangered and over fished despite regulations, Bluefin tuna accumulate toxins like mercury in their bodies, which get passed along to happy restaurant goers. Because the species lives in almost every ocean and migrates to reach an immense number of countries, Pacific Bluefin tuna and Atlantic Bluefin tuna (also classified as northern and southern Bluefin tuna) can be caught and eaten around the world. This also makes them especially hard to monitor: when different nations are competing for one resource in the open ocean where no one has jurisdiction, the international regulations are near impossible to enforce and it becomes a free for all.

One of the distinct features of any common resource is that it is a “non-excludable good1”, meaning no one can be prevented from using what is available. As discussed, the consequence of this scenario is that it will produce a socially inefficient outcome. There are differing theories on how to achieve an economically feasible marginal cost and marginal social benefit equilibrium. The difficulty, of course, is to determine what the socially optimal supply level for Bluefin Tuna should be in relation to fish stock restoration and future sustainability as well as empowering the global community to act in unison. The discussion here

Clover’s stance on overfishing may seem over dramatic, but Clover’s statement is correct in pointing out that the real danger to the ocean’s wildlife is overfishing. Overfishing is when fish and other sea animal populations are being depleted to the point that sea animals cannot keep up with being fished by reproduction. Fishing massive amounts is degrading the oceans, yet there are both developed and developing countries whose economies rely heavily on fishing.

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

The allusive bluefin tuna is one of the largest, fastest and highly sought after fish in the wild sea. The Bluefin tuna can weigh over half a ton, grow to over four metres in length, and dive to depths of 1,000 metres. They can reach speeds of 70 miles an hour and even raise their body temperature far above that of the surrounding water in order to traverse arctic waters. They are among the most ambitiously migratory of all fish, with some tagged bluefin being tracked swimming from North American to European waters several times a year. The bluefin tuna is unique, a perfectly adapted products of evolution. They are also dangerously close to becoming extinct (Brown). Today, the bluefin tuna has been fished out by 97 percent from pre-fishing

Economic and Environmental importance: Recently, Skipjack Tuna has become the most fished Tuna in the world; they account for 40% by weight of all of the Tuna caught in the ocean. Skipjack Tuna are usually caught with purse seines or by hook and line, but their tendency to group together when Fish Aggregate Devices (FAD) are

100,000. This number might seem large, but with 96.4% of the population declining after fisherman started hunting for these animals, the coveted fish might not be around for much longer. The Thunnus SPP, or better known as the Atlantic Bluefin Tuna, is one of the largest bony fish in the world. At one and a half Mr. Zunic’s in height and 200 bags of potatoes in weight (6-10 feet, 1500 pounds according to animalplanet.com), the Atlantic Bluefin Tuna is almost invincible, to predators in the fish class of vertebrates that is. The Atlantic Bluefin Tuna is critically endangered due to overfishing. One fish was once sold for $1.76 million due to the fish’s delicy. The Atlantic Bluefin Tuna is highly popular at high-end restaurants around the world. Boy, a tuna roll sure does sound great right about now.

This essay will focus on the bluefin tuna industry in Japan, a country which consumes the majority of the global catch. The industry is one driven by the sudden increase in demand for sushi, a Japanese haute food which is now consumed globally. It will also illustrate the uniqueness and important role which the bluefin tuna plays in aquatic ecosystems throughout the Pacific, Atlantic, and Indian Oceans. Lastly, the issues of globalization and lack of market regulation will be examined as a cause for the collapse in Atlantic bluefin fisheries. The tuna industry in Japan is having negative environmental impacts on the oceanic ecosystem.

Just overfishing one specimen can kill millions of other land and aquatic animals. There are two ways of killing fish. The first way is to target a specific fish. If fishermen set out to only catch salmon can completely deplete the salmon supply. The second way is to capture all the salmons prey. This will leave the salmon with no food source and become the prey for other predators. At the web page, http://overfishing.org/pages/why_is_overfishing_a_problem.php, it says, “We are losing species as well as entire ecosystems. As a result the overall ecological unity of our oceans are under stress and at risk of collapse.” Fish like the Bluefin Tuna have become endangered due to “overharvesting” found at, http://www.biologicaldiversity.org/programs/population_and_sustainability/7_billion_and_counting/species.html. The Atlantic Bluefin Tuna (Thunnus thynnus) is the most endangered Bluefin tuna species. It has been killed multiple times by bottom thawing and has been fished directly by crews on vessels. Excessively fishing oceans and/or freshwater areas cause us to have a decrease in

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.

Hatcheries seem like a plausible alternative because, instead of going out and fishing up all the tuna in the ocean, you're just gathering up a bunch of tuna that were in a very controlled enviornment, thus leaving the wild tuna to swim free and multiply while we continue to enjoy the wonderful taste of Bluefin. It also seems quite easy because all they would need to to is mate two fish together to get started.

The Bluefin Tuna possesses an elongated streamlined body which contains small to moderate sized scales throughout. The upper exterior is metallic blue and the lower exterior is silver in colour, with gold coruscation distributed sparingly around the body. In humans, their bodies are covered in skin which is the largest organ within the human body (Ebling and Montagna, 2017). The skeleton of the Bluefin tuna comprises of the vertebral column, jaw, ribs, cranium and intramuscular bones. ("Skeletal System Of Fish | Meaning Of Fish Skeleton Necklace", 2017). The skeletal system of the Bluefin tuna provides structure, provides protection, assists in leverage and assists in the production of red blood cells, in conjunction with the kidneys and spleen

Bluefin tuna eat other fish such as mollusks, crustaceans, and macro algae. Sharks and giant marine animals prey on the bluefin tuna itself. Up to 72 parasites also host on the bluefin tuna. Farming the bluefin tuna with chemicals can also impact the environment. Removing bluefin before spawning affects the ratio of offspring. The bluefin tuna reproduces by spawning their eggs. The pacific bluefin tuna lay eggs in the Western Pacific ocean. The Atlantic bluefin reproduce in the Gulf of Mexico and the Mediterranean in the west. After the bluefin tuna lay their eggs, they do not look out for them. It takes four to eight years for bluefin tuna to become sexually matured. The bluefin tuna can live up to an estimated thirty to forty years, but many bluefin tuna are captured before they have the chance to mature. The bluefin tuna can produce large amounts of eggs per year. The chance of survival for each egg, however, is 1 in 40 million. The northern and southern Bluefin tuna are critically endangered. The bluefin tuna has been exploited since recorded history began. The population is decreasing from the demand for Bluefin tunas in high end sushi markets. It is a prized fish to eat. Many chefs, mainly in Japan, buy them for a large amount of money. Also, illegal capturing of the bluefin tuna is a huge issue and illegal fishing has not been controlled and constrained well. The market for canned tuna after 1960 removed a lot of bluefin tuna from the population. Although there is not an exact number of bluefin tuna left, there is a very small amount left in the world. According to research, overfishing caused the Pacific bluefin tuna numbers to drop 96 percent. Fishing fleets from the United States, Mexico, South Korea and Japan are the main countries exploiting the bluefin tuna

In order for there to be plenty of fish in the years ahead, fisheries will have to develop sustainable fisheries and some will have to close. Due to the constant increase in the human population, the oceans have been overfished with a resulting decline of fish crucial to the economy and communities of the world. The control of the world's fisheries is a controversial subject, as they cannot produce enough to satisfy the demand, especially when there aren't enough fish left to breed in healthy ecosystems. Scientists are often in the role of fisheries managers and must regulate the amount of fishing in the oceans, a position not popular with those who have to make a living fishing ever decreasing populations.

Overfishing is an enormous issue that needs to be corrected or there will be no more fish to catch in the future. The true definition of overfishing is as defined by the national fisheries act from 1996 overfishing is “a rate or level of fishing mortality that jeopardizes a fishery's capacity to produce maximum sustainable yield (MSY) on a continuing basis(kennedy, 2016)." Some of the facts of overfishing are so shocking they would blow you out of the water, as well as some of the effects overfishing can have on the fisheries. The solutions to overfishing are extremely simple and completely within our power to do.