Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
. 24/7 Space News .




WATER WORLD
Baby sharks stay still to avoid being detected by predators
by Staff Writers
London, UK (SPX) Jan 10, 2013


Please go here to view the video clip of a bamboo shark embryo responding to an electrical stimulus by ceasing gill movements. Credit: Kempster RM, Hart NS, Collin SP.

Baby sharks still developing in their egg cases can sense when predators are near, and keep very still to avoid being detected, according to research published January 9 in the open access journal PLOS ONE by Ryan Kempster from the University of Western Australia and colleagues.

Adult sharks are known to use highly sensitive receptors to detect electric fields emitted by potential prey. In the current study, researchers found that embryos of some shark species employ similar means to detect potential predators and escape being eaten.

The researchers found that, even within their egg cases, brown-banded bamboo shark embryos can sense electric fields that mimic a predator, and respond by reducing respiratory gill movements to avoid detection. According to the authors, their results suggest that even at these early stages, embryonic sharks can recognize dangers and instinctively try to avoid them.

Kempster adds, "Despite being confined to a very small space within an egg case where they are vulnerable to predators, embryonic sharks are able to recognise dangerous stimuli and react with an innate avoidance response. Knowledge of such behaviours may help us to develop effective shark repellents."

Citation: Kempster RM, Hart NS, Collin SP (2013) Survival of the Stillest: Predator Avoidance in Shark Embryos. PLoS ONE 8(1): e52551. doi:10.1371/journal.pone.0052551

.


Related Links
Public Library of Science
Water News - Science, Technology and Politics






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





WATER WORLD
Genetics clues to survival of coral reef
Palo Alto, Calif. (UPI) Jan 8, 2013
A genetic process that lets some corals withstand high temperatures may hold a key to species survival for organisms around the world, U.S. researchers say. The finding is important because coral reefs are crucial sources of fisheries, aquaculture and storm protection for about 1 billion people worldwide, Stanford University scientists said. "If we can find populations most likel ... read more


WATER WORLD
Mission would drag asteroid to the moon

Russia designs manned lunar spacecraft

GRAIL Lunar Impact Site Named for Astronaut Sally Ride

NASA probes crash into the moon

WATER WORLD
Simulated mission to Mars reveals critical data about sleep needs for astronauts

NASA's Big Mars Rover Makes First Use Of Its Brush

Lockheed Martin Delivered Core Structure For First GOES-R Satellite

Opportunity Scores Another Dust Cleaning Event At Vermillion

WATER WORLD
Simulated Mars mission shows good sleep is critical

2012 in Polish space activities

Captain's log: real space chat for Star Trek crew

Congress Approves Bill Supporting Human Space Exploration

WATER WORLD
Mr Xi in Space

China plans manned space launch in 2013: state media

China to launch manned spacecraft

Tiangong 1 Parked And Waiting As Shenzhou 10 Mission Prep Continues

WATER WORLD
Crew Wraps Up Robonaut Testing

Station Crew Ringing in New Year

Expedition 34 Ready to Ring in New Year

New ISS crew docked at Space Station

WATER WORLD
Arianespace to launch VNREDSat-1A built by Astrium for Vietnam

Arianespace says 2012 sales leapt by 30%

CSF Applauds Passage Of Risk-Sharing Regime Extension For Launch Industry

Rokot Launch Set for January 15

WATER WORLD
NASA's Hubble Reveals Rogue Planetary Orbit For Fomalhaut B

NASA, ESA Telescopes Find Evidence for Asteroid Belt Around Vega

Kepler Gets a Little Help From Its Friends

15 New Planets Hint At "Traffic Jam" Of Moons In Habitable Zone

WATER WORLD
LEON: the space chip that Europe built

Counting the twists in a helical light beam

Oscillating Gel Gives Synthetic Materials the Ability to "Speak"

Cloud computing expands in Latin America




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights 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 Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement