Navigation Links
Parasites might spur evolution of strange amphibian breeding habits
Date:11/14/2007

Athens, Ga. Parasites can decimate amphibian populations, but one University of Georgia researcher believes they might also play a role in spurring the evolution of new and sometimes bizarre breeding strategies.

Brian Todd, a researcher at the UGA Odum School of Ecology Savannah River Ecology Lab, explains that most amphibians start their lives in water (tadpoles are a good example), and then make their way onto land as adults and return to the water to breed. But there are other breeding strategies as well. Take, for instance, the Darwins frog, the species that swallows its eggs and, a few weeks later, regurgitates its young. Or the marsupial frog, a species that carries its eggs on its back until they hatch. Several species lay eggs in small puddles on land or high up in trees where they hatch as miniature versions of adults, bypassing the larval stage entirely.

Researchers have hypothesized that natural selection favored these non-traditional breeding strategies as a way to avoid predatory fish or the risk of a breeding pond or stream drying up. In a review article published in the November issue of The American Naturalist, Todd argues that the diversity of reproductive strategies that amphibians employ might also be influenced by the benefits that come from avoiding viruses, fungi and other parasites.

Most parasites known to affect amphibians tend to be aquatic, so there are clearly benefits to using non-traditional breeding strategies, Todd said.

He points out that breeding in ponds or streams tends to concentrate amphibians in the same place at the same time, which increases the transmission of parasites. The process of metamorphosis decreases an amphibians immunity, which is another factor that benefits parasites at the expense of their amphibian hosts.

Todd said that the idea that parasites can influence reproductive strategies can be tested. A disease caused by a chytrid fungus is causing rapid declines i
'/>"/>

Contact: Sam Fahmy
sfahmy@uga.edu
706-542-5361
University of Georgia
Source:Eurekalert

Page: 1 2

Related biology news :

1. Adaptation to parasites drive African fishes along different evolutionary paths
2. Social parasites of the smaller kind
3. Coral reef fish harbor an unexpectedly high biodiversity of parasites
4. Predators and parasites may increase evolutionary stability
5. Ultra-low-dose aspirin might decrease bleeding severity in portal hypertension
6. New magnetic separation technique might detect multiple pathogens at once
7. Curry-derived molecules might be too spicy for colorectal cancers
8. Evolution is driven by gene regulation
9. Clones on task serve greater good, evolutionary study shows
10. Uncertainty drives the evolution of cooperative breeding in birds
11. Structure of 450 million year old protein reveals evolutions steps
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/31/2015)... NEW YORK , March 31, 2015  Elephant ... the "Company"), a global provider of Software Defined Network ... solutions, today announced total revenue of approximately $20.4 million ... to a restated $19.5 million for the year ended ... of calendar 2014, the Company had completed its multi-year ...
(Date:3/24/2015)... , Mar. 24, 2015 Research and Markets ... of the "Global Iris Recognition Market 2015-2019" ... the Global Iris Recognition market to grow at a ... This report covers the present scenario and the ... the period 2015-2019. To calculate the market size, the ...
(Date:3/23/2015)... SoundView Technology Group issues a new research update ... Wocket smart wallet. SoundView was one of the selected user groups ... the Wocket in multiple scenarios and outlets. ... retailers, making both debit and credit card payments.  ... the company meets their plans in 2015, it would push ...
Breaking Biology News(10 mins):Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 2Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 3Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 4Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 5Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 6Global Iris Recognition Market 2015-2019 with 3M Cogent, Bioenable Technologies, Cross Match Technology, Iris ID Systems & Safran Dominating 2Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 2Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 3Technology Research Note Update from SoundView; Real-World Usage and Feedback of Wocket Smart Wallet at CVS, Whole Foods and other Retailers 4
... This press release is available in French . ... Cancer (IRIC) of the Universit de Montral have identified a ... the origin of several cancers. In an article published in ... recent discovery of a protein complex that controls the RAS/MAPK ...
... have discovered a disease mechanism that links hereditary amyotrophic lateral ... and points to a possible therapeutic target. The findings ... Nature Neuroscience . ALS is an adult-onset disease ... three to five years of diagnosis. Scott Brady, ...
... accumulating in municipal landfills, and reliance on imported oil ... new ultra-light biodegradable foam plastic material made from two ... The new substance could be used in furniture cushions, ... ACS, Biomacromolecules , a monthly journal. ...
Cached Biology News:Discovery of a mechanism that controls the expression of a protein involved in numerous cancers 2Link between 2 forms of ALS suggests drug target 2Link between 2 forms of ALS suggests drug target 3
(Date:4/24/2015)... Diego, California (PRWEB) April 24, 2015 ... announced key milestones in its allogeneic stem-cell product ... Biopharma to properly reflect the corporate strategic direction. ... our allogeneic (donor) adipose stem cell development program ... completion of our cGMP manufacturing facility and hiring ...
(Date:4/24/2015)... SAN DIEGO , April 24, 2015  Pfenex ... in the development of biosimilar therapeutics including high value ... of its follow-on public offering of 6,000,000 shares of ... of $15.50 per share. Of the shares being offered, ... 3,390,000 shares are being offered by existing stockholders. Pfenex ...
(Date:4/24/2015)... April 24 , 2015 PAREXEL International ... services provider, today announced that Partnerships in Clinical Trials ... Management, the 2015 Clinical Innovator of the Year.  The ... team for the Company,s Perceptive MyTrials ® Data-Driven ... Thursday night during the 2015 Partnership Awards in ...
(Date:4/23/2015)... Athena San Diego, an organization that accelerates ... San Diego’s technology and life science sectors, will announce ... their Gala on April 30, 2015 from 5-9pm at ... http://athenasd.org/events/ , The Pinnacle Awards recognize individuals and ... of fostering networking, risk taking and diversity of thought, ...
Breaking Biology Technology:Vet-Stem, Inc. Meets New Milestones and Changes Name to VetStem Biopharma 2Pfenex Inc. Announces Pricing Of Follow-on Offering 2PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 2PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 3PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 4PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 5Athena Pinnacle Awards to Honor Executives, Corporations and Educators Working to Promote Women Leaders 2
... and BioMed Central are announcing the launch ... today, a new online community for ... opportunities and industry news. (Logo: ... http://photos.prnewswire.com/prnh/20040907/CLTU006LOGO ) (Logo: http://photos.prnewswire.com/prnh/20100916/FL66006LOGO ...
... The PhD thesis by Carlos Echeverra Arrondo, Doctor in ... "On doped semiconductor quantum dots and magnetic nanowires", studied ... The interest aroused by nanoscience and nanotechnology spurred Dr ... their size is reduced to less than one hundred ...
... SIAL ) will be presenting at the UBS ... 12:30 PM ET in New York, NY. Interested parties may ... http://investor.sigmaaldrich.com/ .  Users can click the "Webcast" icon to ... Sigma-Aldrich is a leading Life Science and High Technology ...
Cached Biology Technology:BioSpace and BioMed Central Create Global Career Community 2Ph.D. study of behavior of semiconductor crystals of size less than 100 nanometers 2
...
... Nonanoyl-N-methylglucamide White solid. Water-soluble ... readily removed by dialysis. Useful reagent ... by HPLC. Absorbance (10%, H ... O. CMC 19 - 25 mM. ...
Anti Autotaxin /ENPP2 , - (Rabbit)...
... Tecans MiniPrep series of robotic workstations ... The MiniPrep is the ideal automation ... automation of routine laboratory procedures, improving throughput, ... based Gemini for MiniPrep software allows you ...
Biology Products: