What eats a bluefin tuna?

What eats a bluefin tuna?

What tuna eats

Tuna is a genus made up of twelve species that live in the ocean, of which the IUCN has classified five species, four of them as endangered; all of them are in need of revision since the data are from 1996:

One of the aggravating factors of this situation is that the measures taken by the European Union and its Member States are not sufficient. Moreover, they ignore the complaints of artisanal fishermen, scientists, fish traders, distribution chains, NGOs such as WWF/Adena or Greenpeace and tens of thousands of citizens.

The back and upper sides are dark blue to black, with a gray or greenish iridescence. The lower sides are silver, with gray bands and dots, which disappear after death. The first dorsal fin is yellow, while the second dorsal fin is reddish brown. The anal fin is blackish with yellow traces.

In 2006, the plan agreed by ICCAT member countries grants quotas (30,000 t) that are double those recommended by their own scientists (15,000 t). It also keeps purse seine fishing open in the main breeding months (May and June).

Bluefin tuna recipe

You may wonder why such a long trip. There is no single answer to that question. The most obvious one is that they are looking for optimal conditions for reproduction. Bluefin tuna are very demanding and need, first of all, that the water temperature reaches 20ºC. When this happens, they release millions of fish into the water. When this happens, they release millions of eggs and large clouds of sperm into the water. The spawning takes place at a depth of about five meters between two and four o’clock in the morning. It seems that the reason they stay up all night is to avoid predators.

Read more  What is IET 18th edition?

Once the adult tuna have reached the ideal place for spawning, the adventure of life begins for a new generation. The fertilized egg is one millimeter in diameter and floats in the water until it hatches. This process can last between 24 and 72 hours, depending, once again, on the temperature of the water. To hatch, the eggs need their environment to be at least 20º and can survive temperatures of up to 30º.

Grilled bluefin tuna

One of its characteristics is the great quality of its meat, smooth and juicy, proof of the number of kilometers that the animal has had to travel from its place of residence -in the Atlantic, between Cape Verde and the Norwegian coasts- to the area chosen for spawning: the Mediterranean and the Gulf of Mexico. This animal has an amazing memory, which makes them return to the area where they were born during the spawning season.

As for the ways to prepare it, traditionally its loins have been cooked with onions, tomato or, in the north, in the renowned Marmitako. Nowadays, and due to the rise of Japanese cuisine, more and more establishments, especially those close to fishing areas, prepare it in tartar, sashimi or tataki.

Bluefin tuna properties

This procedure, although it may seem cruel, is the most effective and the one that causes the least suffering to the animal, since it is almost immediate and is combined with the ike jime, a Japanese technique where the spinal cord is pierced with a rod, to finish off the animal so that its gastronomic properties are not lost.

Read more  Does nil apply d3?

It does not live in large schools (called shoals) but its fishing does occur in this way due to the large agglomeration of animals and it is an endothermic fish, capable of regulating its own temperature. Moreover, it is at the top of the marine trophic pyramid, being a great predator, eating mackerel, mackerel, plaice, squid and other cephalopods and shellfish, only having as natural predators the killer whale, some large sharks and humans.

Its high levels of phosphorus and magnesium are practical to strengthen our bones and teeth, being also advantageous for our nervous system. In addition, the magnesium in it favors our intestinal health and the correct muscular development of our body, making it a good product for athletes.

What eats a bluefin tuna?
Read more  How long can you be delayed before compensation?
Scroll to top