Energy News  
FLORA AND FAUNA
Electric Fish May Be A Species Diverging

Photo courtesy of Cornell University.
by Staff Writers
 Ithaca NY (UPI) Jun 05, 2006
 U.S. scientists say some electric fish in Africa might be living examples of a species diverging into separate species.

Cornell University researchers say the fish look alike and have the same genetic makeup, but have very different electrical signals and will only mate with fish that produce the same signals. The Cornell neurobiologists say they believe the different electrical signals are the fishes' first step in diverging into separate species.

"We think we are seeing evolution in action," said Matt Arnegard, a neurobiology postdoctoral researcher.

The electric fish -- known as mormyrids -- emit weak electric fields to sense their surroundings and communicate with other fish. Each species of mormyrid produces a characteristic electric impulse.

While the fish may be able to understand other species' impulses, said Arnegard, "They seem to only choose to mate with other fish having the same signature waveform as their own."

However, when researchers were about to publish descriptions of two separate species, Arnegard decided to take a genetic look at those particular fish -- and he couldn't find any differences in their DNA sequences.

The study appears in the Journal of Experimental Biology.

Source: United Press International

Community
 Email This Article
 Comment On This Article
Related Links
 the missing link Darwin Today At TerraDaily.com


Memory Foam Mattress Review
SPACE MEDIA NETWORK PROMOTIONS
 Solar Energy Solutions
Tempur-Pedic Mattress Comparison ...
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News


FLORA AND FAUNA
Fourth Slovenian bear released in Pyrenees
 Bagneres-De-Luchon, France (AFP) Jun 2, 2006
A fourth brown bear from Slovenia was released in France's southern Pyrenees mountains Friday as part of a programme to ensure the species' survival, the environment ministry said.






ENERGY TECH
  • New US fuel standards give hope to diesel industry
  • Turning Corn Fiber Into Ethanol
  • Ultrasonics Boosts Release Rates Of Corn Sugars For Ethanol Production
  • China looks to harness wind power

    • CIVIL NUCLEAR
  • Ex-French nuclear chief charged over Chernobyl cover-up
  • Iran Calls For Tenders On Two New Reactors
  • India admits more work to be done on nuclear deal with US
  • Radioactive Tritium Pollutes Groundwater

    • BLUE SKY
  • Faster Atmospheric Warming In Subtropics Pushes Jet Streams Toward Poles
  • Atmospheric Warming Expanding The Tropics
  • In The Baltics Spring And Smoke Is In The Air
  • UNH And NASA Unlock The Puzzle Of Global Air Quality

    • WOOD PILE
  • Tropical Forests Reveal Improvements in Sustainable Management
  • Indonesia promises this year will be less hazy
  • Vicious Cycle Of Rainforest Destruction
  • Smithsonian Helps To Plan For Panama's Coiba National Park

    • FARM NEWS
  • In cod we trust -- with a little help from the lab
  • Duck-And-Goose Lock-Up
  • Super-Sized Cassava Plants May Help Fight Hunger In Africa
  • Search for sushi draining Mediterranean's red tuna stocks

    • CAR TECH
  • Activists Press Ford On Environmental Policies
  • Prototype For Revolutionary One-Metre Wide Vehicle Is Developed
  • Highly Realistic Driving Simulator Helps Develop Safer Cars
  • Research On The Road To Intelligent Cars

    • AEROSPACE
  • CENTAF Releases Airpower Summary
  • Giant NASA Balloon Lifts Of From Esrange Space Center
  • Bush, Blair resolve dispute over Joint Strike Fighter
  • British Aerospace Production Up Strongly In First Quarter

    • NUCLEAR SPACE
  • Could NASA Get To Pluto Faster? Space Expert Says Yes - By Thinking Nuclear
  • NASA plans to send new robot to Jupiter
  • Los Alamos Hopes To Lead New Era Of Nuclear Space Tranportion With Jovian Mission
  • Boeing Selects Leader for Nuclear Space Systems Program

    • The content herein, unless otherwise known to be public domain, are Copyright 1995-2006 - SpaceDaily.AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA PortalReports are copyright European Space Agency. All NASA sourced material is public domain. Additionalcopyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement