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FAO forensic techniques to improve seafood safety for consumers

Tuesday, February 2nd 2010 - 04:44 UTC
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Did you say this is fish? Did you say this is fish?

An unknown percentage of the fish we eat isn't what's it's purported to be and could have fatal consequences. FAO explores how forensic techniques could help address the problem.

“Identifying unprocessed fish is usually fairly easy,” says Michele Kuruc of FAO's Fisheries and Aquaculture Department. “But today seafood is transported far abroad, to places where it may not be well known. Plus, as the industry has globalized, it is common that fish products are processed on floating factories before they come to shore. What inspectors see often doesn't look much like a fish in the wild.”

In some instances, accurately identifying fish may be beyond the abilities of inspectors. Innocent clerical errors can end up turning one type of fish into another.

Or unscrupulous fishers and traders game the system to avoid restrictions or taxes.

According to Kuruc, those involved in illegal, unreported and unregulated (IUU) fishing use many methods to conceal their illegal activities and get their ill-gotten goods to market.

“Fraudulent product substitution and use of false labels and documentation are frequently employed to transport and market products illicitly,” she says.

As a result an unknown percentage of seafood on the shelves simply isn't what's it's purported to be.

This is a problem. Today's more conscious consumers are aware of the multiple health benefits of eating seafood—but are also keen to be sure they're eating fish that has been caught or farmed responsibly and is safe to eat. And there's much more at stake.

In recent years a number of major food retailers have committed to stocking only seafood certified as sustainable.

As of January 1, 2010, the world's biggest seafood market, the European Union, has put in place regulations aimed at blocking imports of fish not harvested legally.

With 110 million tonnes of seafood consumed globally per year, international trade in fish is valued at a record high of 86 billion USD annually and is a major source of employment and government revenue for developing countries, where many of the fishing grounds that feed the first world are found.

Additionally, concerns about the wellbeing of many fish stocks necessitates diligent oversight of what fish are being taken and where.

Forensic technologies based on genetics and chemistry are already being used by some countries to monitor and control trade in produce, animals and timber. So FAO recently convened a workshop of experts, inspectors, law enforcement officials, scientists and academics to discuss how they might be more widely deployed in fisheries enforcement.

“We're interested in promoting wider use of available forensic techniques, in particular by developing countries”, says Kuruc. ”Some countries have successfully used various forensic methods in investigations and court cases, but many fisheries monitoring, control and surveillance personnel still remain unaware of their existence.“

DNA analysis can reveal the species of a suspect white fillet. Chemical tests on fish ear-bones reveal absorbed nutrients and pinpoint the region where they were caught.

”We need to push the envelope, because we can be sure that those involved in IUU fishing are doing so,“ Kuruc added.

”One workshop participant related how a group convicted of illegally trading abalone confessed that they learned techniques for destroying evidence by watching CSI: Miami.”

In addition to surveying the state of the art and brainstorming how forensics might be used in fisheries and identifying needs—especially for capacity building in developing countries—the meeting also looked at best practices in handling evidence, how inspectors should be trained, and identifying laboratories capable of handling testing. (In many cases, labs in developing countries currently testing for food quality could be upgraded to conduct forensic work.)

The group also agreed to operate as an ad hoc FAO reference network that can be tapped by authorities around the world for guidance and advice.

“Fish can be properly identified if samples are handled properly, get to the right labs, and checked using forensic techniques,” said Kuruc. “So the idea is to help countries that don't have such facilities and know how can access so them so they can identify and prosecute cases of malfeasance.”

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