The Loh Down On Science

Blistering Barnacles

And you thought online dating was wacky!

This is Sandra Tsing Loh with the Loh Down on Science

Saying, prepare to be impressed. For their body size, these crustaceans have some of the world’s longest male members!  Four or more times their body length!

That’s handy, since they live glued to rocks. To mate, scientists have thought that barnacles simply reach over and fertilize their neighbors. Or, if alone, fertilize themselves. They’re hermaphrodites. So they can do that.

But Pacific “gooseneck barnacles” have smaller units. They can’t always reach neighbors. Is, uh, "self-service" their only option?

To find out, biologists from the University of Alberta collected goosenecks. Some were clustered; others were sad, isolated barnacles. All contained fertilized eggs.

When the team analyzed the eggs’ DNA ... surprise! All egg masses from isolated barnacles’ contained DNA other than their own.

So these barnacles must shoot their sperm out into the water, and likewise catch sperm from others doing the same thing.
 
And if that’s too much information, perhaps it’s time for us to clam up.  Yikes.
 

The Loh Down on Science is produced by LDOS Media Lab, with 89.3 KPCC Pasadena, California. And made possible by the generous support of the Gordon and Betty Moore Foundation.

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