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Survival Smarts: Healthy Lobsters Shun the Sick
ap ^ | 5/24/06 | Bjorn Carey

Posted on 05/25/2006 3:57:00 AM PDT by Flavius

Caribbean spiny lobsters are normally gregarious creatures, enjoying the company of living together in underwater caves. ADVERTISEMENT

But friendships are quickly severed if a lobster starts to smell like it's infected with a lethal disease.

Even before an infected lobster starts showing symptoms, its mates pick up on the infection and avoid the sick one like, well, the plague, forcing it into a solitary existence.

While the cold shoulder might sound harsh, it's an extremely effective means of maintaining low incidence of the disease in the wild, researchers write in a new study published in the May 25 issue of the journal Nature.

Deadly disease

The lethal virus, called PaV1, was first noticed by Donald Behringer, a graduate student at Old Dominion University. He was drawing blood from lobsters. Some, he noticed, had milk-colored blood instead of the normal, healthy clear stuff. PaV1 infects juvenile spiny lobsters and is transmitted mainly by physical contact. Seawater can spread the disease among the smallest creatures.

During subsequent field studies, the researchers found that 93 percent of infected lobsters lived on their own.

Unsure whether what they were seeing was an intentional split, the researchers brought lobsters into their laboratory and gave them the option of entering dens containing either healthy or diseased lobsters. While the sick lobsters did not discriminate, healthy lobsters shunned the sick.

"This is the first record of healthy animals avoiding diseased members of their own species in the wild," said study co-author Jeff Shields of the Virginia Institute of Marine Science.

Cruel but effective

The behavior helps curb spread of the disease in the wild, the study found. In the lab, when healthy lobsters are placed with infected ones, they too become infected and 60 percent die within 80 days.

In populations off the coast of Florida, however, the rate of infection is just 7 percent.

The ability of healthy lobsters to determine that their neighbors are infected, but not yet infectious, provides an important evolutionary advantage, Shield said. Lobsters that possess this trait, and are successful at avoiding the sick, are more likely to survive, breed, and pass on the trait to their offspring.

* Mystery Disease Killing Lobsters * Boiling Lobsters Likely Feel No Pain * Take That! Lowly Slugs Escape Lobster's Grasp * Virtual Pandemic: 90 Days to Infect Entire U.S. * Vote for the World's Ugliest Animal

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TOPICS: News/Current Events
KEYWORDS: diseases
well this could never work for humans we are to bright,

instead we should take all exotic airborne toxins and fly them 550 miles per hour across the globe

and feel dandy about it

1 posted on 05/25/2006 3:57:03 AM PDT by Flavius
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To: Flavius
with concern over contamination, I always wear protective devices around lobster......

I also practice safe consumption by first dipping any offensive tail or claw flesh in drawn butter.

2 posted on 05/25/2006 4:08:19 AM PDT by Vaquero ("An armed society is a polite society" Robert A. Heinlein)
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To: Flavius

Well, I've helped the cause by eating as many of these little healthy gold-and-purple babies as I possibly can, so that I too can sense a diseased one before it hits the grill - ha ha.

Ooh, the smell of these lobsters, hacked in two and thrown on an outdoor grill with just a few spices and mops and mops of butter is heavenly beyond description! Resistance is futile.


3 posted on 05/25/2006 4:14:55 AM PDT by Rte66
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To: Flavius

Sounds like even Lobsters are smarter than homosexuals.


4 posted on 05/25/2006 4:33:23 AM PDT by sgtbono2002
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To: Flavius

I'm all for banishing Washington and libs far, far away.


5 posted on 05/25/2006 4:34:38 AM PDT by mtbopfuyn (I think the border is kind of an artificial barrier - San Antonio councilwoman Patti Radle)
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To: Flavius

Any lobsters on Mt. Everest?


6 posted on 05/25/2006 4:40:28 AM PDT by SlowBoat407 (A living insult to Islam since 1959.)
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To: SlowBoat407
Any lobsters on Mt. Everest?

sad part is we'd not leave one behind

7 posted on 05/25/2006 4:48:55 AM PDT by Revelation 911 (nnnnnneeeeet)
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To: Flavius
If only we did that with HIV carriers instead of celebrating how well they have overcome such obstacles we might get somewhere in slowing the spread down.
8 posted on 05/25/2006 4:55:13 AM PDT by Abathar (Helen Thomas's first job was the test dummy at the Ugly Stick Manufacturing Co.)
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To: sgtbono2002
Sounds like even Lobsters are smarter than homosexuals.

The lobsters are just being shellfish.

9 posted on 05/25/2006 5:01:32 AM PDT by pikachu (I do not see the glass as half full or half empty but as the Jack Daniels is gone and the ice melted)
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To: Vaquero

Lobster bibs are for sissies.


10 posted on 05/25/2006 5:25:52 AM PDT by Maceman (Fake but accurate, and now double-sourced)
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To: Maceman

A real man would wear a white sport coat with a pink crustacean.


11 posted on 05/25/2006 5:39:37 AM PDT by Rte66
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To: Maceman

never wore one myself.

use my sleeve to wipe my mouth too.


12 posted on 05/25/2006 6:05:52 AM PDT by Vaquero ("An armed society is a polite society" Robert A. Heinlein)
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To: Rte66

I show my age by knowing how bad that was.


13 posted on 05/25/2006 6:58:08 AM PDT by Maceman (Fake but accurate, and now double-sourced)
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