Sushi eat Tuna Introduction (let’s meet the fish)
The overfishing is a common problem with some species across the sea world. The Bluefin Tuna is one of the hardest hit victim of this fishery. This specie of Tuna is located in the entire North Atlantic ocean but also in seas closed to it such as the Mediterranean sea, but also a strip from the equator until Norway, and from the Gulf of Mexico to the Black sea.
The Bluefin Tuna is one of the most affected stock by overfishing in the sea world. Indeed, his current stock corresponds to approximately 21% to 29% of what it was in 1970. (Kiger, 2011)
Since the 17th Century, oceans had been governed by «the freedom of the seas». This concept means that there were free to all nations and the property of none. However, some factors have affected stocks by considerably reducing the population.
Before 60’s tuna was a substitute for salmon and sardines but since the situation of Tuna has considerably changed. It is currently fished over 70 countries across the world. The major phenomenon of the 80’s is the growth of the sushi-sashimi market. This new demand has launch a “race to fish”(WWF, 2012). Furthermore, the market value of the Tuna has increased in the same way.The basic price for a kilo of tuna is between 30 and 40$. However, it can easily reach 500$/kg for high quality tuna. In 2001 in the Tokyo Market, a tuna has been sold at 174 000 $ US. Tuna products represent today 9% of the global fish trade for approximately 5 million dollars.
To answer this demand and take a maximum profit from this market, fisheries has improved their fishing technics with the help of new gear technologies such as purse seine nets which scrape the bottom of located areas and leave no chance for tuna. To maximise their profits, they also used aquaculture on seasides. This technic consists to bring them to maturity while the fattening. On the market, these fishes become more valuable because of