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Author Topic:   Mimicry and neodarwinism
deerbreh
Member (Idle past 2921 days)
Posts: 882
Joined: 06-22-2005


Message 79 of 188 (348003)
09-10-2006 9:35 PM
Reply to: Message 20 by MartinV
09-01-2006 3:26 AM


MartinV writes:
And how is it possible that insects with totaly different body plans as plants, that they can "mimics" plants with different logic of development?
What kind of screwy logic is that? Insects cannot be selected to look like leaves or twigs because they do not develop in the same way plants do? Anyone who would argue from such biological ignorance should not be on a science board.

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deerbreh
Member (Idle past 2921 days)
Posts: 882
Joined: 06-22-2005


Message 80 of 188 (348007)
09-10-2006 9:59 PM
Reply to: Message 35 by MartinV
09-06-2006 2:38 PM


MartinV writes:
...He also assumes that first inital step of mimic toward its model would have been a big one, otherwise there was no selection advantage for mimic. Afterwards only small changes proceeded - "tuning" - to the model. As far as I know, this is well established darwinian explanation of the phenomenon of butterflies mimicry - but it is certainly in conflict with Darwins idea of small changes.
No this is quite incorrect all the way around. Even a small resemblance of the model gives a selective advantage because it makes it slightly less likely that the animal will be eaten. Tuning to the model occurs because closer resemblence gives even more protection for the animal which possesses the trait. And I have never heard this "well established Darwinian explanation" for mimicry, somehow that was left out of the courses I took in Insect Ecology and Animal Ecology - both of which addressed the phenomenon of mimicry. So where pray tell do you get your knowledge?

This message is a reply to:
 Message 35 by MartinV, posted 09-06-2006 2:38 PM MartinV has replied

Replies to this message:
 Message 86 by MartinV, posted 09-11-2006 1:47 PM deerbreh has replied

deerbreh
Member (Idle past 2921 days)
Posts: 882
Joined: 06-22-2005


Message 81 of 188 (348008)
09-10-2006 10:08 PM
Reply to: Message 35 by MartinV
09-06-2006 2:38 PM


MartinV writes:
...- for instance, how is it possible that a nonpalatable butterfly mimics other nonpalatable butterfly? What is the selective advantage of this so-called Mullerian type of mimicry ?
The more distasteful models there are, the more likely that a predator has encountered one and thus knows to avoid that particular pattern. It is not complicated. Simple old strength in numbers.

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deerbreh
Member (Idle past 2921 days)
Posts: 882
Joined: 06-22-2005


Message 82 of 188 (348009)
09-10-2006 10:38 PM
Reply to: Message 74 by MartinV
09-10-2006 3:23 PM


Re: Heliconius
Wasps (hornets) are aposematics, bees
are cryptic. Yet both groups serves as models for their own mimics
Bees that have mimics are not cryptic. Here is a robber fly bee mimic capturing its model bee. I think you will agree that neither the mimic nor the bee is cryptic in any usual sense of the word.
ATSHQ: American Tarantula & Animals

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deerbreh
Member (Idle past 2921 days)
Posts: 882
Joined: 06-22-2005


Message 83 of 188 (348011)
09-10-2006 10:49 PM
Reply to: Message 75 by MartinV
09-10-2006 3:52 PM


Re: Heliconius and its plants
Do you have any explanation for mushrooms? As far as I have read, there is no selective pressure on them from vision oriented animals (except squirells) yet the shapes and colours are astonishing. Is there any darwinistic explanation of this at all?
You scold Jar for bringing up mimicry in vertebrates and now you want to talk mushrooms? Not all bright colors/patterns are examples of warning coloration. Propose a new topic if you wish to discuss it.

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Replies to this message:
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deerbreh
Member (Idle past 2921 days)
Posts: 882
Joined: 06-22-2005


Message 121 of 188 (349964)
09-18-2006 12:23 PM
Reply to: Message 86 by MartinV
09-11-2006 1:47 PM


Selective replies don't cut it.
MartinV, I see no need to address any questions you raise, as you ignore responses and links that address your questions and assertions. Furthermore you string together comments and links and throw in off the wall tangental topics and think that this suffices for serious debate. It doesn't. I am beginning to think you are not really interested in this debate but just want to stir things up as much as possible in some kind of sophomoric game.

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 Message 86 by MartinV, posted 09-11-2006 1:47 PM MartinV has not replied

Replies to this message:
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