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Narwhal ivory

Discussions, identification and analysis of the different types of Marine Ivory
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Clive
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Postby Clive » Tue Mar 25, 2014 2:34 pm

Fascinating article..

http://www.independent.co.uk/news/science/scientists-solve-the-mystery-of-the-narwhals-tusk-9202935.html

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souldeep
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Postby souldeep » Tue Mar 25, 2014 2:44 pm

A fascinating article and thanks for sharing it... also an equally good counter to the theory on the same page. If the tusk is used for identifying saline levels why would it not be on both the male and female Narwhal's? Perhaps the Male Narwhal's are socially responsible for directions in the group... more research required but adds a very interesting depth to the material section.
Piglet: "Pooh?" Pooh: "Yes, Piglet?" Piglet: "I've been thinking..." Pooh: "That's a very good habit to get into to, Piglet." - A.A. Milne.

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DSW90049
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Postby DSW90049 » Tue Mar 25, 2014 5:44 pm

Good God, what an amazing evolutionary adaptation to swimming around in Arctic waters for millions of years!


"Now, a team of scientists from Harvard University led by marine dental specialist Martin Nweeia say they’ve cracked the mystery, and that the tusk is actually a massive sensory organ, used by the whales to measure the salt concentration of water and let the know whether icebergs nearby are melting (low salinity) or forming (high salinity).

ImageA small percentage of female narwhals grow tusks as well, and approximately one in 500 males grow two tusks.

Central to this theory is the composition of the tusk. Just like a human tooth, the narwhal's twisted canine is made up of distinct layers, with a permeable outer layer (the cementum) that channels seawater through the tough inner layer (the dentin) to a central, pulp core that's full of nerve endings and blood vessels."

------> You have to simply stand in awe of evolution. It is maddening that here in the US, we have so many complete morons who deny evolution, a group which seems to grow each year. Evolution is not a theory; it is a fact, and stories like this one, prove just how amazing a fact it really is.Image
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JimLewis
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Postby JimLewis » Wed Mar 26, 2014 12:56 pm

Interest6i8ng story.

Creationists, of course, say God "designed" the narwhale because he wanted to.
Jim Lewis - lewisjk@alltel.net - Western NC - [font=8]People, when Columbus discovered this country, it was plumb full of nuts and berries. And I'm right here to tell you the berries are just about all gone. Uncle Dave Macon, old-time country musician[/font]

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Clive
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Postby Clive » Wed Mar 26, 2014 1:17 pm

.. and that the Platypus proves God has a sense of humour. ;)

Image
Attachments
1841960_platypus-03-swimming.jpg

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DSW90049
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Postby DSW90049 » Wed Mar 26, 2014 1:21 pm

Amen to that . . . . ;)8-)
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carlomagno
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Postby carlomagno » Thu Mar 27, 2014 11:13 pm

as usual in nature, male narwhal do all the heavy job, not only carrying that heavy stuff but alerting females when need to migrate. sounds wire isn't? really I do not believe it! this is one of the things in need of lot more research, nothing is for free in nature.
Nec spe nec metu

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DSW90049
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Postby DSW90049 » Fri Mar 28, 2014 12:31 am


Image
"There is no shortcut to netsuke collecting; it takes time, study and patience. The market is flooded with utterly worthless rubbish. . . . "
Netsukes: Their Makers, Use and Meaning, H. Seymour Trower(1898)~~~~David

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chonchon
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Postby chonchon » Fri Mar 28, 2014 2:49 am

Carlo, do you think some of the females are butch, or could they be the ones goading the males to do all the work?

"A small percentage of female narwhals grow tusks as well,"
Piers

Size is something.

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souldeep
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Postby souldeep » Fri Mar 28, 2014 8:20 am

Piers - it's possible evolution has been able to lend a helping a hand to some of the females where some social groups have issues with "lacking" males...

Narwheller: "But dear - are you sure it's this way - looks a bit icy to me. Perhaps you should consult your tusk first?"
Narman: *blowhole*. o O ( fsssssssSSSSST ) "hmmmmph... I don't need to consult the tusk for directions - I know the way."
Narwheller: "Errr.. Dear... I seem to be stuck in ice again!"

And of course far better joke than mine;

Why does it take 100 million sperm to fertilize one egg?
Because not one will stop and ask for directions.
Piglet: "Pooh?" Pooh: "Yes, Piglet?" Piglet: "I've been thinking..." Pooh: "That's a very good habit to get into to, Piglet." - A.A. Milne.


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