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Author Topic:   Electric Fish on Verge of Evolutionary Split
CK
Member (Idle past 4127 days)
Posts: 3221
Joined: 07-04-2004


Message 1 of 5 (317302)
06-03-2006 5:59 PM


quote:
Electric fish emit weak signals from an organ in their tails that serves as a battery. Different emissions signal aggression, fear or courtship.
While the fish can apparently understand each others' warning signals, "They seem to only choose to mate with other fish having the same signature waveform as their own," explains neurobiologist Matt Arnegard of Cornell University.
But in the Ivindo River in Gabon, Arnegard and colleagues have found fish with the same DNA emitting distinctly different signals. The fish are likely on the verge of splitting into two species, the researchers announced today.
"We think we are seeing evolution in action," Arnegard said.
Electric animals
Because electricity is easily transmitted in water, many species of amphibians and fish have adapted to detect weak electric signals. Some, like sharks, use it to find prey. Others, like the electric eel, generate deadly voltages for defense or to kill prey. Others emit and detect electrical signals primarily as a means to communicate with their own kind.
http://news.yahoo.com/...ctricfishonvergeofevolutionarysplit

Replies to this message:
 Message 2 by Damouse, posted 06-03-2006 6:50 PM CK has not replied

Damouse
Member (Idle past 4905 days)
Posts: 215
From: Brookfield, Wisconsin
Joined: 12-18-2005


Message 2 of 5 (317320)
06-03-2006 6:50 PM
Reply to: Message 1 by CK
06-03-2006 5:59 PM


Nice!
Great example of Microevolution becoming Macro.

-I believe in God, I just call it Nature
-One man with an imaginary friend is insane. a Million men with an imaginary friend is a religion.
-People must often be reminded that the bible did not arrive as a fax from heaven; it was written by men.
-Religion is the opiate of the masses

This message is a reply to:
 Message 1 by CK, posted 06-03-2006 5:59 PM CK has not replied

Replies to this message:
 Message 3 by Faith, posted 06-03-2006 6:56 PM Damouse has replied

Faith 
Suspended Member (Idle past 1444 days)
Posts: 35298
From: Nevada, USA
Joined: 10-06-2001


Message 3 of 5 (317324)
06-03-2006 6:56 PM
Reply to: Message 2 by Damouse
06-03-2006 6:50 PM


Re: Nice!
What on earth would make such a happening "macro?" Changes and adaptations are common and are all micro.

This message is a reply to:
 Message 2 by Damouse, posted 06-03-2006 6:50 PM Damouse has replied

Replies to this message:
 Message 4 by Damouse, posted 06-03-2006 7:02 PM Faith has not replied

Damouse
Member (Idle past 4905 days)
Posts: 215
From: Brookfield, Wisconsin
Joined: 12-18-2005


Message 4 of 5 (317331)
06-03-2006 7:02 PM
Reply to: Message 3 by Faith
06-03-2006 6:56 PM


Re: Nice!
Macro in the sense that they will become a new species.
small changes add up untill one species is larger, has longer gills, doesn't use electricity, ect. and then you have two species and then you have a new species
Edited by Damouse, : No reason given.

-I believe in God, I just call it Nature
-One man with an imaginary friend is insane. a Million men with an imaginary friend is a religion.
-People must often be reminded that the bible did not arrive as a fax from heaven; it was written by men.
-Religion is the opiate of the masses

This message is a reply to:
 Message 3 by Faith, posted 06-03-2006 6:56 PM Faith has not replied

AdminBen
Inactive Member


Message 5 of 5 (317334)
06-03-2006 7:07 PM


Thread copied to the Electric Fish on Verge of Evolutionary Split thread in the In The News (Creation/Evolution only) forum, this copy of the thread has been closed.

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