Purty Molluscs

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Architeuthis
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To make a short story long...

I got my hair cut today, which is something I loathe even more than having my teeth cleaned. (While the results are wonderful in both cases, there's just something awfully disturbing about trying to sit still while sharp/pointy objects are being applied to bits of my head.) As I was waiting for my turn in the chair, I was trying to think of interesting things not to talk to the hairdresser about. (Where did all the barbers go?) While I was staring vacantly at a picture of some lovely model with some lovely haircut vacantly staring back at me, I hit upon chromatophores as a suitable topic to concentrate on while I was being tormented for the next 20 minutes. It was the model's makeup. It occurred to me that chromatophores would be an absolute godsend to most of the women I know. Think of the time, money, and frustration (mostly incurred by male companions) that could have been saved, if only the vagaries of evolutionary pressure had so allowed. (BTW, what's the deal with eyeshadow? :yuck: ) So here's what's been bothering me:

How did cephalopod chromatophores evolve? Are there any good theories or studies that indicate how this might have happened?

I'm having a hard time convincing myself of a plausible way around that "irreducible complexity" bunk.
 

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Jean

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Think of the time, money, and frustration (mostly incurred by male companions) that could have been saved, if only the vagaries of evolutionary pressure had so allowed. (BTW, what's the deal with eyeshadow? :yuck: )
I actually think it was a con job by the male of the species! If you look at most other species it's the MALE who gets all gussied up to attract a mate, somewhere along the line we got conned into putting that gunk on our skin for you fellas to admire(?)

BTW yes I DO have some eyeshadow & if you give me a year or so I may even remember where I put it...........don't wear it much (ever!) course that may be why I'm footloose & fancy free at the moment, that and the fact I have no life (the thesis thingy!) and often smell of eau d' squid! :lol: :lol: :lol:

J
 

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Jean said:
I actually think it was a con job by the male of the species! If you look at most other species it's the MALE who gets all gussied up to attract a mate, somewhere along the line we got conned into putting that gunk on our skin for you fellas to admire(?)
Such is the price of enforcing monogamy (which I happen to prefer, since the alternative seems like too much damned work :D ). Shall I launch into my rant about De Beers? :x


Mmmmm, eau d'squid... :yuck:
 

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Jean said:
Shall I launch into my rant about De Beers? :x
If you like, personally, I prefer saphires!
All this talk of sparkly things reminds me of something...

I think my question should be expanded to encompass the evolution of cephalopod body patterning from a holistic point of view. (Does anyone even care? I'm going to turn this thread into a blog, eventually.) Doesn't the efficacy of chromatophores in crypsis/communication depend on the distribution of reflecting cells, iridophores, and leucophores? Does it make sense to inquire about the evolution of chromatophores in isolation?

I'm assuming that the whole papillation(?) issue can be studied separately from colouration. Does that make sense?

Enough questions. I'm going to :beer: :beer: :beer: ... :sleeping: now.

Avast! There be new smilies in the hold: :arr: I'll be raisin' a cup 'o me finest grog ta salute the beauties (sorry, Phil) that painted these! Arrrrr!
 

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Architeuthis
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BTW; thanks, Jean, for being the only person to reply to this thread. As for you hundred (or so) others...

:P
 

tonmo

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Well I think these are good questions... in fact I promoted them in the newsletter last week!

Tough ones though... evolution of chromatophores... Have you seen this one?

Shells are often seen as a major contribution to the success of molluscs. Why, then, have many molluscs lost or reduced their shells?

Talks about how the shedding of shells led to the evolution of chromatophores.

That's from Andrew Gray, not to be confused with Andrew Packard from one of your excellent links up there...

Does it make sense to inquire about the evolution of chromatophores in isolation?
I would think so!
 

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