Navigation Links
Sand dollar larvae use cloning to 'make change,' confound predators
Date:3/13/2008

Nature is full of examples of creatures that try to look as big as possible in an effort to scare away potential predators. But to avoid being eaten alive the larvae of sand dollars appear to have a different strategy, in a way exchanging a dollar for a couple of dimes.

University of Washington biologists have found that 4-day-old sand dollar larvae created clones of themselves within 24 hours of being exposed to fish mucous, a cue that predators are near. In each case, the cloning process resulted in a small new larva and the original larva substantially smaller than it had been.

The larvae responded to the general threat of predation rather than the immediate possibility of predator attack, said Dawn Vaughn, a UW biology doctoral student at the University of Washington's Friday Harbor Laboratories. The process caused the original larvae to shrink from about 300 microns, or about a hundredth of an inch, to about half that size, and the new larvae were even smaller.

"We think that by reducing their size they also reduce their visibility to predators," said Vaughn, who is lead author of a paper describing the work in the March 14 edition of Science.

Larval cloning has been observed previously among echinoderms, which include about 7,000 species of sea creatures, including starfish, sea urchins and sand dollars. However, this is the first time cloning by larvae has been seen as a survival mechanism in the face of possible predation.

The larvae of the sand dollar species Dendraster excentricus float as part of the plankton at various levels in open water, feeding as they slowly grow. After six weeks, the larvae reach a size of perhaps a three-hundredths of an inch and then settle to the ocean floor to finish developing to adulthood.

But as they float, the larvae are neither fast nor agile and have a high mortality rate, easily devoured by fish. Vaughn exposed 4-day-old larvae to fish mucous to see how th
'/>"/>

Contact: Vince Stricherz
vinces@u.washington.edu
206-543-2580
University of Washington
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Titanium Group Signs Letter of Intent to Acquire Multimilion Dollar Medical Software Company and Its Existing Sales Network
2. Titanium Group Signs Letter of Intent to Acquire Multimilion Dollar Medical Software Company and Its Existing Sales Network
3. Does the desire to consume alcohol and tobacco come from our genetic makeup?
4. Bacteria from sponges make new pharmaceuticals
5. Extra gene copies were enough to make early humans mouths water
6. Nanotech could make solar energy as easy and cheap as growing grass
7. Scientists, policymakers and industry leaders gather to discuss ocean iron fertilization
8. Engineered eggshells to help make hydrogen fuel
9. New drug makes weight loss safer
10. Jumping genes could make for safer gene delivery system
11. Genetic differences in clover make one type toxic
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/18/2014)... is probably the ultimate form of camouflage: you don,t ... this strategy is not as uncommon as you might ... County, USA, explains that the larval life stages of ... part of the anatomy that most creatures cannot make ... have to shield each individual eye unit with an ...
(Date:9/17/2014)... to reproductive technologies, the justice and well-being of ... to identify key issues, articulate their values and ... most defensible ways forward. But what are the ... The Hastings Center and the Presidential Commission for ... to publish a series of essays to highlight ...
(Date:9/17/2014)... his doctoral student have designed a device based on ... fog and dew., The device could provide water in ... globe., Cheng Luo, professor in the Mechanical & Aerospace ... same College of Engineering department, published "Bioinspired Plate-Based Fog ... Chemical Society) Applied Materials & Interfaces ...
Breaking Biology News(10 mins):Transparent larvae hide opaque eyes behind reflections 2Why bioethics literacy matters 2Why bioethics literacy matters 3Shorebird's beak inspires UT Arlington research on water collection 2
... , ... ... ... ...
... fish says a new research report published in the March ... http://www.fasebj.org ). In the report, scientists show that the omega-3 ... the body kill neuroblastoma cancer cells. This discovery could lead ... neuroblastoma, medulloblastoma, colon, breast, and prostate cancers, among others. ...
... strong farming history and its indigenous people,s relationships ... extended family) provide the landscape for an experiment ... of Hawaii at Manoa transformed an agricultural and ... to strengthen the community of educators and build ...
Cached Biology News:BIO-key(R) International to Showcase Biometric Identification Technology at RSA Conference 2010 2BIO-key(R) International to Showcase Biometric Identification Technology at RSA Conference 2010 3BIO-key(R) International to Showcase Biometric Identification Technology at RSA Conference 2010 4BIO-key(R) International to Showcase Biometric Identification Technology at RSA Conference 2010 5Connecting science with culture 2
(Date:9/19/2014)... , September 19, 2014 Biotech ... development of emerging drug systems and advanced Laboratory Instrumentation. ... and Company (NYSE: BDX ), Thermo Fisher ... Inc. (NASDAQ: RGDO ), Sangamo Biosciences Inc. ... HOLX) Pressure BioSciences, Inc. (OTCQB: PBIO) ("PBI" ...
(Date:9/19/2014)... Barnhardt Manufacturing Company has ... Organic Cotton . The USDA Certified Biobased Product ... ingredients meets or exceeds levels set by USDA. Biobased ... or in significant part of agricultural, forestry, or marine ... cotton to be immediately identified as a USDA certified ...
(Date:9/19/2014)... -- The new , Healthcare and Life Sciences ... on PharmaBoardroom.com for free download , looks ... Spanish economy in 2009, and the austerity measures that followed, ... in times of trouble. "Despite the crisis, ... market, and the general conditions to invest are favorable to ...
(Date:9/18/2014)... , Sept. 18, 2014 /PRNewswire-iReach/ -- DeepResearchReports.com ... China Acetic Acid Industry" and "2014 Deep Research ... reports to its research database. Photo ... Deep Research Report on Global and China Acetic ... report on China and ...
Breaking Biology Technology:Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 2Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 3Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 4Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 5Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 6Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 7Barnhardt Manufacturing Company Earns USDA Certified Biobased Product Certification and Label for Organic Cotton 2PharmaBoardroom Releases New Spain Pharmaceuticals Report 2PharmaBoardroom Releases New Spain Pharmaceuticals Report 3Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 2Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 3Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 4
... games in the classroom, in such varied fields as ... aim of a new project being led by a ... Massachusetts Institute of Technology. , ,The Education Arcade is ... the effectiveness of game-playing in education, encourage software developers ...
... The Wisconsin Historical Societys old Web site is history. The ... news, features and Odd Wisconsin, the latter of which exhibits ... du Chien snuck in their whiskey during Prohibition (hint: it ... agency in Wisconsin to use this technology. , ,The XML-based ...
... acquired RegEd Inc. for an undisclosed amount today in a ... Officer Leslie Muma , allow Fiserv to cross-sell RegEd ... take over the operations of Emerald Learning Solutions, a Fiserv ... industries. All of RegEds 75 employees are expected to join ...
Cached Biology Technology:Video-Games in the Classroom 2Video-Games in the Classroom 3Wisconsin Historical Society Embraces New Web Site Technology 2
Rabbit polyclonal to ErbB 2 ( Abpromise for all tested applications). entrezGeneID: 2064 SwissProtID: P04626...
Mouse monoclonal [TU-20] to beta III Tubulin (FITC) ( Abpromise for all tested applications). entrezGeneID: 10381 SwissProtID: Q13509...
Mouse anti-HIV-Imn PND Class: Antibody Product Group: Bacterial and Viral Antigen...
Rabbit polyclonal to Testosterone 19 ( Abpromise for all tested applications). Antigen: Testosterone 19 CME HSA (Human)...
Biology Products: