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:1/22/2015)... , Jan. 13, 2015  Today, FreeWavz ( www.FreeWavz.com ... its crowdfunding campaign on Fundable, https://www.fundable.com/freewavz . ... of production capacity to meet customer demand. ... - http://photos.prnewswire.com/prnh/20150113/168790 Invented ...
(Date:1/22/2015)... and POINT ROBERTS, Washington , January ... covering leading sectors including technology and tech stocks, releases video ... featuring master pickpocket and security consultant Apollo Robbins . ... and talks about the Wocket™ biometric smart wallet, a product ...
(Date:1/22/2015)... 2015 Infinisource has launched its new NXG series of ... G2 sets a higher standard for collecting attendance and labor ... With plug-and-play installation, touch screen interface and seamless connection to ... time collection solution for the small to mid-size employer. ...
Breaking Biology News(10 mins):FreeWavz Launches on Fundable to Drive Speed-to-Market in 2015 2Apollo Robbins Talks about the Illusion of Personal Safety and How Easily Your Wallet is Stolen; If a Wocket Wallet is Stolen the Thief Can't do Anything With it! 2Apollo Robbins Talks about the Illusion of Personal Safety and How Easily Your Wallet is Stolen; If a Wocket Wallet is Stolen the Thief Can't do Anything With it! 3Infinisource's NXG series sets new time clock standard 2
... Md A fossil leaf fragment collected decades ago on ... North America,s oldest flowering plants, a 115- to 125-million-year-old species ... today,s bleeding hearts, poses a new question in the study ... evolve along with its distinctive pollen? Or did pollen come ...
... drinks high in caffeine and taurine had significantly increased heart ... today at the annual meeting of the Radiological Society of ... what effect these energy drinks have on the function of ... cardiovascular imaging section at the University of Bonn, Germany, which ...
... produced by MRSA (methicillin-resistant Staphylococcus aureus ) could ... toxin. This "nanosponge vaccine" enabled the immune systems of ... toxin from MRSAboth within the bloodstream and on the ... described the safety and efficacy of this nanosponge vaccine ...
Cached Biology News:Evolution, Civil War history entwine in plant fossil with a tragic past 2Evolution, Civil War history entwine in plant fossil with a tragic past 3Cardiac MRI reveals energy drinks alter heart function 2'Nanosponge vaccine' fights MRSA toxins 2'Nanosponge vaccine' fights MRSA toxins 3'Nanosponge vaccine' fights MRSA toxins 4
(Date:1/22/2015)... Jan. 22, 2015   Cypher Genomics, Inc., ... (NASDAQ: SQNM ), the leading molecular ... next generation noninvasive prenatal tests (NIPT). Through this ... called Mantis™, to advance analysis of clinically-relevant fetal ...
(Date:1/22/2015)... 2015  Derma Sciences, Inc. (Nasdaq: DSCI ... wound care, announces that AMNIOEXCEL® and AMNIOMATRIX®, amniotic ... to the Premier, Inc. Regenerative Skin Grafting contract ... AMNIOEXCEL® and AMNIOMATRIX® product lines, which continue to ...
(Date:12/24/2014)... NEW YORK , Dec. 24, 2014 PlasmaTech ... care in critical areas, announced the closing of an underwritten ... to purchase up to an aggregate 3,500,000 shares of common ... $.01 per warrant.  The warrants have a per share exercise ...
(Date:12/24/2014)... 23, 2014 “Preparative & Process ... Flash), Consumables (Columns, Solvents, Buffers, Valves, Guages, Seals), ... Agriculture) - Forecasts to 2019” provides a detailed ... current market trends, and strategies impacting the preparative ...
Breaking Biology Technology:Cypher Genomics and Sequenom Announce Development Agreement 2Cypher Genomics and Sequenom Announce Development Agreement 3Cypher Genomics and Sequenom Announce Development Agreement 4Derma Sciences Expands Access of its AMNIOTIC TISSUE Product Line with New Premier, Inc. Agreement 2Derma Sciences Expands Access of its AMNIOTIC TISSUE Product Line with New Premier, Inc. Agreement 3Derma Sciences Expands Access of its AMNIOTIC TISSUE Product Line with New Premier, Inc. Agreement 4Derma Sciences Expands Access of its AMNIOTIC TISSUE Product Line with New Premier, Inc. Agreement 5PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 3Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 2Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 3Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 4
... Biosystems, Inc. (OTC Bulletin Board: WGBS), a leading ... that Christopher Sears, Ph.D. has joined the company,s ... focused on designing and commercializing novel molecular diagnostics ... the development of computational biology systems for several ...
... ... safety specialty firm BioSoteria announced that its Vice President of eLearning ... credential from the American Society for Training and Development (ASTD) Certification ... communications and health care training experience and is responsible for the ...
... ... November 19 and is of interest to anyone working in continuous flow chemistry processing, will ... scale flow chemistry equipment. Professor Ley,s work of over 670 publications has been recognized ... ...
Cached Biology Technology:WaferGen Names Christopher Sears, Ph.D., Architect of High-Value Molecular Diagnostics and Computational Biology Platforms, to Company's Scientific Advisory Board 2WaferGen Names Christopher Sears, Ph.D., Architect of High-Value Molecular Diagnostics and Computational Biology Platforms, to Company's Scientific Advisory Board 3WaferGen Names Christopher Sears, Ph.D., Architect of High-Value Molecular Diagnostics and Computational Biology Platforms, to Company's Scientific Advisory Board 4BioSoteria eLearning Executive Michelle Nolin Flewell Earns Certification 2BioSoteria eLearning Executive Michelle Nolin Flewell Earns Certification 3BioSoteria eLearning Executive Michelle Nolin Flewell Earns Certification 4Professor Steven Ley of University of Cambridge will Present Free Webinar, 'Application of the ReactIR Flow Cell to Continuous Processing Technology' 2Professor Steven Ley of University of Cambridge will Present Free Webinar, 'Application of the ReactIR Flow Cell to Continuous Processing Technology' 3
Whole blood is collected from mice (Swiss Webster, 8-10 weeks old,either sex) and processed within 45 minutes of collection. The complement is then filtered and pooled on ice, bottled and stored at -...
Whole blood is collected from healthy guinea pigs of either sex from US source which are free of visible diseases at time of blood collection. Hemolytic titer: CH50 = 435 units...
Luminometers...
cDNA Size Fractionation Columns offer an efficient and convenient method for size-fractioning double-stranded cDNA....
Biology Products: