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Thanks for the chuckle, and knock ’em on their rears!
Thanks again, Dan 🙂
I love caterpillars! I got to spend 12 days out in the jungles of Costa Rica with Dr. Lee Dyer (of Tulane University) hunting for caterpillars to study their parasites … and their life cycles… and their food… and their predators… and how to hopefuly control them in crops… it was WAY COOL (figuratively speaking, of course… in reality, it was almost unbearably HOT for an Alaskan Girl)
Right on, Ruth! That sounds like an awesome experience!
So the caterpillar’s “mind” has been so taken over by the parasitoid (wasps?) that it actually defends its own enemies.
Sounds like some people I know.
That’s exactly it, Susannah…it’s likely a chemical reaction induced by the wasps, but the mechanism (in this particular instance, anyways), it not completely understood. Caterpillars who were NOT affected by the wasp didn’t move at all in response to the presence of a predator, even if the researcher stuck a clutch of wasp pupae within reach…
I think learning about toxoplasmosis at an early age was the first time I was introduced to parasites that modify the behavior of their hosts. And since then I’ve found the whole idea to be so frackin’ cool! Especially when it involves kung fu.
Funny, I hadn’t known that toxoplasmosis also could induce changes in host behaviour until yesterday, when a bunch of us grad students were discussing this article yesterday. There are actually a surprisingly large number of examples where viruses, parasites or parasitoids influence host behaviour in order to complete their life cycles. It really is incredibly fascinating (or, as we were calling it yesterday, “sexy”) stuff!
You have just totally FREAKED me out. Holy mind-control. Yikes!
Check THIS example out: right after the wasp larvae emerge from the caterpillar and pupate, the caterpillar’s final act is to construct a protective cocoon around its killers. AAAK!
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