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Were Psychoactive Plants Designed for a Purpose or Just random evolution at work?

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Author Topic:   Were Psychoactive Plants Designed for a Purpose or Just random evolution at work?
Taz
Member (Idle past 3319 days)
Posts: 5069
From: Zerus
Joined: 07-18-2006

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Message 8 of 19 (451351)
01-27-2008 11:54 AM 		Reply to: Message 6 by Quetzal
01-27-2008 8:09 AM

Re: Intent versus happenstance
Quetzal writes:
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A mere 13,000 years (well, even if we postulate the 25,000 years some authors argue) simply isn't enough time for human-derived selection pressures to have caused this kind of adaptation
That's kinda debatable. For example, the samurai crab off the coast of Japan.
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In only a few thousand years, the Japanese fishermen unknowingly created this crab with a samurai face.
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 Message 12 by Quetzal, posted 01-27-2008 5:42 PM Taz has replied
  
Taz
Member (Idle past 3319 days)
Posts: 5069
From: Zerus
Joined: 07-18-2006

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Message 14 of 19 (451456)
01-27-2008 7:20 PM 		Reply to: Message 12 by Quetzal
01-27-2008 5:42 PM

Re: Intent versus happenstance
Q writes:
​
Oh, and the heike/samurai story may in fact be an urban legend.
Well, duh. The legend may be untrue, but the fact remains that for thousands of years fishermen actually would throw the crabs with the face-looking carapace back into the sea. This gives an advantage to the crabs that look more and more like a samurai face. Artificial selection.
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Taz
Member (Idle past 3319 days)
Posts: 5069
From: Zerus
Joined: 07-18-2006

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Message 18 of 19 (452305)
01-30-2008 12:43 AM 		Reply to: Message 17 by Quetzal
01-28-2008 9:22 AM

Re: Intent versus happenstance
Quetzal writes:
​
Heh. Actually, the urban legend part was about the fishermen actually throwing them back. Apparently that isn't the general case.
Oh well, I guess we'll never know for sure. It's not like the japanese fishermen a thousand years ago actually kept records of throwing them back to the sea or not.
​
But you're right, the claim has been disputed.
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