giacca peuterey donna You Should Know These Five Fish
Tuna are wild animals, but many people simply understand them as food. Using the shorthand can be a bit confusing, as it tends to cover a whole family of species, from the relatively small and widespread skipjack, right up to the majestic and beleaguered bluefin. or Europe.
This is not intended to encourage you to eat them, but toraise awareness of what it is that being served up. If you going to eat tuna responsibly, here are some issues you need to think about.
There are about 15 species of tuna recognized worldwide, but you are likely to only encounter these five:Skipjack is relatively small and the most abundant and widely fished of tuna species. The fish can be up to a meter in length, but is rarely recognizable when served up. It makes up more than70 percent of the American canned tuna market (often called chunk light). Tuna chunks and flakes in brine or oil, on a sandwich, baked potato, or pizza? Safe bet it skipjack.
It a pretty abundant species, but there are still issues around how it is fished. In particular, fishing methods indiscriminately harm other species, which end up as bycatch.
Most skipjack is caught using large purse seine nets. When these are set around Fish Aggregation Devices (or FADs, which are reallyjust floating structures that act like fish magnets) they result in huge amounts of bycatch of other fish, as well as sharks, rays, even sea turtles, and, occasionally, whales or dolphins. Using FADs has been shown to increase the amount of bycatch tenfold.
The famous dolphin safe logo on tuna may tell you that its not caught in a way that deliberately catches or sets nets around dolphins, but it no guarantee. And of course, tells you nothing about impacts on other species.
A net bulging with tuna and bycatch on the Ecuadorean purse seiner Lady which was spotted by Greenpeace in the vicinity of the northern Galapagos Islands while using fishing aggregating devices (FADs).
Sadly, many of the species caught and killed as bycatch are endangered, including several species of open ocean sharks and sea turtles. And when you factor in the scale of the fishing operation to fill those little cans, that adds up to a whole lot of collateral damage, including tens of millions of sharks every year.
Luckily, there are better, cleaner ways to catch skipjack. And, yes, they have yellow fins, including characteristically sickle shaped elongated go faster ones. They are found around the world but mostly confined to tropical waters. They can grow to over two meters in length.
Yellowfin tuna can be found either in cans or sold fresh and frozen as tuna steaks. You may also find it in sushi. The package should tell you what species it is (if it doesn don buy it).
Like skipjack, yellowfin are caught with purse seines, and when FADs are used, the vast majority are young yellowfin that never get a chance to breed. Another method of catching them is using longlines: lines of baited hooks that can be many miles long. This method of fishing can be very indiscriminate and responsible for lots of bycatch. Sharks, swordfish, turtles, and seabirds can all fall victim to the baited hooks. Longlining is the main reason that global albatross populations are endangered, and as with purse seining, some of the species caught and killed are endangered sharks and turtles, too.
Turtle caught in Spanish longline, Mediterranean.
There are ways to make longlining better, but the safest way to know that your yellowfin hasn come at the cost of other animals lives is to look for pole and line caught.
However, there are now real concerns that populations of yellowfin have been totally overfished, and in many places are still plummeting. west and east coasts. They have an unusually long pectoral fin and are sometimes referred to as white tuna because of their pale flesh.
Albacore tuna is often sold as solid white albacore in cans. shelf stable tuna market.
Skipjack tuna are caught by pole and line off Flores, Indonesia.
Albacore is mainly caught on longlines, but they can be caught with much more ocean friendly methods, such as pole and line and a similar method called trolling.
Most populations of albacore have been totally overfished. The only relatively healthy stocks are in the Pacific, but these are in decline. Sadly, bigeye tuna are in trouble, with many populations plummeting in recent years due to overfishing. It caught in similar ways to yellowfin, and while you might encounter it served up as tuna steaks, its much more likely you find it served as sushi. It is one of the two species known as along with yellowfin.