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  Topic: Coloration of animals, mimicry, aposematism, Is really natural selection behind it?< Next Oldest | Next Newest >  

Posts: 807
Joined: Jan. 2006

(Permalink) Posted: Oct. 12 2007,16:05   

Quote (VMartin @ Oct. 12 2007,15:53)
So according the article spiders are mimicking ants only when there are no predators present. It is very weird, isn't it?


Ants, when disturbed, tend to respond aggressively to the threat, whereas spiders tend to dodge the threat, hiding beneath a leaf or in a crevice, or dropping on a drag line. It has been noted that spider myrmecomorphs, which are also behavioral mimics, abandon their ant-like gait when disturbed (Emerton 1911, Marson 1947, Fowler 1984, Brignoli 1984). This sudden, unexpected change in the behavior of the spider would most likely facilitate its escape from an ant predator.

I would say if they didn't use an ant-like gait at all it would give them even more protection, he?

You are misunderstanding the article.  The spiders mimic ants when there are no ant predators present.  When a predator is present that specifically feeds on ants, the spiders change their signals to indicate that they are not ants.

I pointed this out days ago, but apparently you never bothered to read my post.

Quote (afdave @ Oct. 02 2006,18:37)
Many Jews were in comfortable oblivion about Hitler ... until it was too late.
Many scientists will persist in comfortable oblivion about their Creator ... until it is too late.

  365 replies since Sep. 21 2007,11:31 < Next Oldest | Next Newest >  

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