Young sea animals clone themselvescentury-old debate halted

After more than a century of intensive study, scientists have assumed that larvae of non-parasitic invertebrates reproduce only very rarely, but new research by University of Alberta scientists overthrows this conventional wisdom. Graduate student Alexandra Eaves and Dr. Richard Palmer, from the U of A's Faculty of Science, have found that asexual cloning by some marine invertebrate larvae is not as rare and enigmatic a phenomenon as previously assumed.

"A wealth of knowledge of how embryos grow has come from studying sea urchin development," said Eaves. "The discovery that these young animals can clone themselves provides an exceedingly rare opportunity to examine how a growing animal can repeat its own early development using a part of its body."

Scattered earlier reports have observed that invertebrate larvae can spontaneously clone but Eaves and Palmer discovered this trait in three new echinoderm groups--sea cucumbers, sand dollars, and sea urchins--offering surprising new insight about chordate evolution. Larval cloning represents an intriguing new dimension to invertebrate life histories including the suggestion that clones may subsequently clone. The research is published in the current edition of the prestigious journal Nature.

The larvae of echinoderms (the group that includes starfish, sea urchins, sea cucumbers, etc.) usually swim and feed for several months before transforming into a miniature adult. During this time some larvae form an outgrowth -- essentially a ball of tissue -- that pinches-off of the larval body and grows into a second, normal-looking larva--a clone.

One of the most remarkable parts about the research is that for more than 100 years, scientists may have observed larval asexual reproduction, but did not recognize what they saw, said Palmer. Even more remarkably, at least one early report of larval cloning was dismissed as an artifact of laboratory culture conditions.

"These data make it cle

Contact: Phoebe Dey
University of Alberta

Page: 1 2

Related biology news :

1. Second call for proposals for the European Young Investigator Award
2. Kiratisin wins 2004 Dade MicroScan Young Investigator Award
3. APS announces four 2004 Young Investigators awards
4. Young chimpanzees show sex differences in learning
5. Young scientists awarded for achievements in cancer research
6. A big surprise: Young nerve cells can rewind their developmental clocks
7. Young cancer researchers honored
8. EMBO Young Investigators 2000 2002
9. Young plants natural defenses amount to more than just its seed
10. UT Southwestern postdoctoral researcher wins international Young Scientist Prize
11. APS announces its 2002 Young Investigators Awards

Post Your Comments:

(Date:10/4/2017)... Ill. , Oct. 4, 2017  GCE Solutions, a global ... new data and document anonymization solution on October 4, 2017. Shadow ... pharmaceutical field to comply with policy 0070 of the European Medicines ... and data. ... by GCE Solutions ...
(Date:6/30/2017)... ARLINGTON, Va. , June 30, 2017 /PRNewswire-USNewswire/ ... a leading developer and supplier of face and ... the ATA Featured Product provider program. ... created an innovative way to monitor a driver,s ... benefit greatly from being able to detect fatigue ...
(Date:5/16/2017)... TEANECK, N.J. , May 16, 2017  Veratad ... leading provider of online age and identity verification solutions, ... the K(NO)W Identity Conference 2017, May 15 thru May ... Ronald Regan Building and International Trade Center. ... across the globe and in today,s quickly evolving digital ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... platform specifically designed for life science researchers to analyze and interpret datasets, ... Franklin, who made a major contribution to the discovery of the double-helix ...
(Date:10/11/2017)... ... October 11, 2017 , ... ComplianceOnline’s Medical Device Summit is back for its ... 2018 in San Francisco, CA. The Summit brings together current and former FDA office ... directors and government officials from around the world to address key issues in device ...
(Date:10/11/2017)... Tbilisi, Georgia (PRWEB) , ... October 11, 2017 , ... ... disaster, taking the lives of over 5.5 million people each year. Especially those living ... the greenovative startup Treepex - based in one of the most pollution-affected countries globally ...
(Date:10/10/2017)... Angeles, CA (PRWEB) , ... ... ... Inc., a development-stage cancer-focused pharmaceutical company advancing targeted antibody-drug conjugate (ADC) therapeutics, ... uses of targeted HPLN (Hybrid Polymerized Liposomal Nanoparticle), a technology developed in ...
Breaking Biology Technology:
Cached News: