Saturday, December 09, 2006


Category Craziness in "Decapod Duels"

The other day during the end-of-semester review for my Information Organization and Retrieval course at UC Berkeley I reminded my students that every classification scheme is biased. Even when this message is softened by rephrasing it as every classification takes a point of view it doesn’t sit well with people who want to believe in "reality" where categories are based on objective features or characteristics of objects, documents, or other "bibliographic entities" that we want to describe.

A few months ago when Pluto’s "demotion" from the "planet" category was a hot topic I wrote about how poorly people understand the nature of categories and classification systems. Yesterday I ran across another example, this one involving lobsters, which I’ve also written about in the different contexts of logistics and customs documentation.

This new lobster story has been reported on National Public Radio and in the Economist (2 December 2006 print edition, story titled "Dueling Decapods") and concerns a dispute about what can be called a lobster. The state of Maine wants to protect its lobster industry by enforcing some rules about the lobster category.

Maine's first approach is downright silly, branding lobsters as "Certified Maine Lobsters" in a jingoistic attempt to smear lobsters from Nova Scotia or New Hampshire as somehow inferior. This classification is unscientific because it denies the fact that lobsters migrate. If Maine's goal is to classify lobsters by geographic origin, I think it needs to distinguish native ones from those "just passin' through" from Nova Scotia who are visiting their Maine relatives.

And furthermore, 60-70% of the lobsters caught in Maine are exported to Canada for processing, and many of them are then re-exported to the US. So many "Canadian" lobsters are in fact incorrectly classified as "Maine" ones, except for those that were born in Canada and unfortunately caught as tourists "passin' through" Maine's waters.

A second front in the lobster classification war concerns whether a "langostino" can be marketed as lobster. From the perspective of biological taxonomy, both langostinos and lobsters are "decapods," hence the title of the Economist article, but the former isn't a lobster. So this time, instead of denying science to establish a classification scheme, Maine is relying on it. However, the Wikipedia entry for "langostino" says that:

Langostino is a Spanish word for prawn that is commonly used by restaurants to refer to the meat of the "squat lobster," which is neither a true lobster nor a prawn.

So there are some conflicts between scientific classification and "folk" classification. The US FDA sides with the restaurant industry and recognizes that many people think of langostino as a kind of lobster, and so it approved that classification on restaurant menus. But this unscientific classification has outraged Maine's senator Olympia Stowe, and she has asked the FDA to reconsider:

"Permitting this inferior product to be improperly marketed as 'lobster' not only pollutes consumers' appetite for real lobster, but it also exposes consumers who suffer from certain allergies to potentially life-threatening allergic reactions."

Perhaps Maine needs a branch of the “Minutemen” dedicated to securing its borders against illegal lobsters. But their rules of engagement would be complicated. They would want to let migrating lobsters in but then not let them leave in order to let Maine report higher numbers of "Certified Maine Lobsters." But they would want to stop all langostinos at the border.

-Bob Glushko


Once lobsters reach adulthood, it is believed that they only migrate relatively short distances to warmer water--see the link you cited. So it is not necessarily unscientific to classify ADULT lobsters as "Maine" lobsters.

Also, there may be some legitimate reason to do so--lobsters from Southern New England are suffering a shell disease and the waters off Maine are, arguably, cleaner (not than Canada, however).
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