Blog:Tiger tamed
Posted in news on November 2nd, 2009 by admin – Comments OffConservationists often refer to the bluefin tuna as the “tiger of the sea”, but in truth a mature bluefin outweighs, outgrows and outpaces even the heftiest wild cat.
Bluefin can weigh up to 1,400lbs (635kg) and measure 15ft (5m) long, and can sustain bursts of speed up to 60 mph (100 km/h) in pursuit of prey.
Warm-blooded, they migrate across oceans, and females produce up to 30 million eggs each spawning season.
Bluefin tuna have fascinated and fed humans for ages. The first evidence of bluefin fishing in the Mediterranean dates to the 7th Millennium BCE when the Phoenicians established fisheries using hand-lines and primitive seine nets.
Aristotle studied tuna in his History of Animals, written in 350 BCE, and contended that the enormous fish gorged for two years before bursting from overeating.
Four hundred years later, Pliny the Elder recommended eating tuna to treat ulcers, suggesting the neck, belly and throat as the finest pieces that must be eaten fresh even though “they cause severe fits of flatulence”.
But it wasn’t until the late 20th Century that that tuna became a global business.
In recent years, sushi and sashimi have exploded in popularity in Japan and around the world, and consumers tout the fatty flesh of the bluefin as the most prized meat.
Purse seine ships, which close drawstring nets around schooling fish, became larger and more sophisticated, and fattening cages dotted the seas starting in 1996.
These cages, which can measure 50m (165ft) across, may represent the biggest threat to bluefin survival.
Tuna, often juvenile, are captured and dumped in the cages – or “ranches” – for months to fatten up, with all the associated problems of aquaculture: disease, waste and overfishing of the smaller fish used to feed the bluefin.
Fishing for giant bluefin has become hugely profitable.
In the 1960s, its meat sold in the US for seven cents a pound. This season, the first bluefin sold in Taiwan netted $105 a pound.