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Originally published July 7, 2009 at 12:00 AM | Page modified July 7, 2009 at 11:28 AM

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Breeding breakthrough helps sushi baron create sustainable tuna

The majestic bluefin, a metallic-blue-and-silver fish, is prized by sushi lovers in Japan, the U.S. and Europe for the rich taste and creamy texture of its meat. In their zeal to feed those palates, fishermen have almost wiped out the two species of bluefin — northern and southern — while also threatening the yellowfin and bigeye tuna.

Bloomberg News

Hagen Stehr was at home in Adelaide, Australia, on March 12 when his company's chief scientist called with news that their $48 million bet on the breeding of southern bluefin tuna in captivity — a feat never accomplished — might finally pay off.

"Big fella, you better come back," scientist Morten Deichmann said to the 6-foot-1-inch Stehr.

Stehr, chairman of Port Lincoln, Australia-based Clean Seas Tuna, rushed more than 300 miles to his company's fish hatchery outside Arno Bay in southern Australia. With tears in his eyes, he pushed his Toyota Land Cruiser to its top speed of 112 mph as he raced to see the fertilized eggs for himself.

As the owner of a fishing fleet during the past four decades, Stehr had helped empty the seas of the bluefin tuna used in sushi restaurants from New York to Tokyo. Now, at 67, he believed he was on the verge of saving the tuna — and the industry that made him rich — from the threat of extinction.

"Everyone thought I was a bloody lunatic," says Stehr, in jeans and a checked shirt from the iconic line of boots and outdoor clothing named for R.M. Williams, an Australian bushman.

"Nobody in the world had ever done this. We've created a sustainable fishing industry for years ahead."

The majestic bluefin, a metallic-blue-and-silver fish, is prized by sushi lovers in Japan, the U.S. and Europe for the rich taste and creamy texture of its meat.

In their zeal to feed those palates, fishermen have almost wiped out the two species of bluefin — northern and southern — while also threatening the yellowfin and bigeye tuna.

"In a few years, there'll be nothing left for us to fish," says Atsushi Sasaki, a Japanese fisherman who's caught bluefin for 20 years. "The collapse of bluefin is just around the corner."

The Japanese are the biggest consumers of bluefin, devouring 80 percent of the world's catch.

The fish has been served at restaurants such as Nobu, a chain of at least 18 high-end Japanese eateries. The menu at Nobu London, however, warns that bluefin is a threatened species and asks patrons to order an alternative dish.

The saga of the bluefin, a creature that can swim 45,000 miles in 17 months to spawn and feed, shows the difficulties in managing resources across borders — a sign of the challenges ahead as countries confront the more intractable problems of environmental degradation and global warming.

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At the same time, Stehr's indoor-breeding breakthrough points to the role technology may play in addressing these broader resource issues.

Since the early 1980s, countries working through the United Nations have tried, and failed, to set catch quotas tough enough to protect bluefin and other tuna from overfishing.

"Where you have politicians arguing for a share of a quota, that quota will inevitably be inflated," says Callum Roberts, a marine conservation biologist at the University of York in England. "That kind of decision making guarantees the collapse of a population."

Stehr and his scientists now must find a way to grow fertilized hatchery eggs into adult tuna.

One challenge: The bluefin, a predator, eats its young.

"If Hagen Stehr can solve the issues surrounding breeding predacious fish, he'll have a sustainable product that will last forever," says Barbara Block, a professor of marine science at Stanford University.

"The future lies somewhere in what they're doing."

Clean Seas, which has raised about $58 million since its initial public offering in December 2005, plans to build more indoor tanks to protect and grow young fingerlings before they're put into the ocean.

Stehr aims to produce at least 250,000 bluefin by 2015 — a number that would almost equal the total bluefin catch of Australia's fishermen in a single year.

Bluefin sell for as much as $20,000 a fish at Tokyo's Tsukiji, the world's largest fish market.

As prices soar Stehr stands to add to his fortune. He's worth about $135 million, according to the 2009 annual Australian rich list by BRW magazine, a business publication owned by Fairfax Media.

Since the 1970s, Stehr has helped build a tuna industry worth about $7.2 billion globally in 2006.

The fishermen have thrived on the high seas, particularly in the Mediterranean, where they have exceeded quotas established by regulators.

If Stehr's breeding experiment bears fruit, it will change his place in history — from one of the fishermen who endangered the bluefin to the entrepreneur who helped save it.

Copyright © 2009 The Seattle Times Company

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Comments (5)
The Japanese are the biggest consumers of bluefin, devouring 80 percent of the world's catch. Hmmm, and I thought only American's were...  Posted on July 7, 2009 at 12:47 PM by reasonablemind?. Jump to comment
Uh, farmed Australian tuna? Why is that any different than farmed Atlantic salmon?  Posted on July 7, 2009 at 1:54 AM by Dipstick Duck. Jump to comment
mmmm...tasty fish3  Posted on July 7, 2009 at 8:26 AM by Whazzap Dude. Jump to comment


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