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Marine tubeworms need nudge to transition from larvae state
Date:1/9/2014

A common problem at Pearl Harbor, biofouling affects harbors around the world. It's the process by which barnacles, muscles, oysters, and tubeworms accumulate on the bottom of boats and other surfaces. Now researchers at the University of Hawai'i at Mānoa's Kewalo Marine Laboratory have discovered a biological trigger behind the buildup.

Crusty marine creatures begin life as miniscule larvae floating in the open ocean, says Michael Hadfield, a Professor of Biology. But before the larvae settle on a surface and start to grow, they need a bacterial cue to initiate metamorphosis.

"The critical issue is how they find the right spot to make that transformation: the right place where food will be available and where there will be others of the species with which to reproduce," Hadfield said. "The success of the species depends on the larvae settling in on exactly the right spot."

Or the wrong spot, depending on who you're talking to. The U.S. Navy, commercial cargo shippers, and many private boat owners would like to find a way to stop biofouling before it starts. A surface layer of barnacles or other marine life slows down boats and increases the amount of fuel it takes to move them through the water.

Biofouling begins when floating larvae come into contact with a biofilm formed by a microbe that coats steel, plastic, and glass surfaces in calm ocean waters. Now new research from UH Mānoa and the California Institute of Technology has isolated the genetic underpinnings of this novel form of bacterium-animal interaction.

The results were published in the January 9, 2014, issue of the journal Science, in an article titled, "Marine tubeworm metamorphosis induced by arrays of bacterial phage tail-like structures." Collaborator Nicholas Shikuma, the first author on this paper, studied with Hadfield and earned his masters degree at UH Mānoa. He is now a postdoctoral scholar at Caltech.


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Contact: Talia S. Ogliore
togliore@hawaii.edu
808-956-4531
University of Hawaii at Manoa
Source:Eurekalert  

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