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:11/4/2014)... CORAL GABLES, Fla. (November 4, 2014) — Think about ... and ask: How do neighboring cells know that they ... cell and how do these tissues find the correct ... (UM) are answering these crucial questions. , In a ... tissues use to communicate with their surrounding neighbors, at ...
(Date:11/4/2014)... 2014) – A majority of Madagascar,s 101 species of ... serious consequences for the rainforests they call home. A ... impacts lemurs can have on rainforest tree populations, which ... have on the region,s rich biodiversity. , A large ... by lemurs. Lemurs in turn disperse the seeds ...
(Date:11/3/2014)... University of Colorado Cancer Center study published ... of Sciences describes the activity of a recently ... 37 or IL-37. It has been known to limit ... the adaptive immune system: IL-37 inhibits the ability of ... , "Knowing this mechanism that underlies IL-37,s effect on ...
Breaking Biology News(10 mins):The inside story: How the brain and skull stay together 2Gardeners of Madagascar rainforest at risk 2Gardeners of Madagascar rainforest at risk 3PNAS: From HIV to cancer, IL-37 regulates immune system 2
... Scientists at Cold Spring Harbor Laboratory (CSHL) and ... implying that commonly occurring large chromosomal deletions that ... multiple functionally linked genes whose loss, they posit, confers ... Looking closely at one large deletion -- a so-called ...
... , This press release is available in ... doctors need unique features which they can use to unequivocally ... search for the biomarkers for an illness or a combination ... possible to measure. Researchers at the Max Planck Institute for ...
... with research associate Jerilyn Walker and assistant professor Miriam Konkel, ... ancient jumping genes called Alu, which are more than 16 ... the Zoological Society of San Diego and the Institute of ... open access journal Mobile DNA . These tiny ...
Cached Biology News:Clusters of cooperating tumor-suppressor genes are found in large regions deleted in common cancers 2Clusters of cooperating tumor-suppressor genes are found in large regions deleted in common cancers 3Biosignatures distinguish between tuberculosis and sarcoidosis 2Biosignatures distinguish between tuberculosis and sarcoidosis 3LSU research finds orangutans host ancient jumping genes 2
(Date:11/26/2014)... (PRWEB) November 26, 2014 The report ... defines and segments the concerned market for revenue forecasts ... at a CAGR of 51.9% from 2013 to 2018. ... reach a value of $1,415.6 million by 2018. , ... Automation Report TOC for information about the market segmentation ...
(Date:11/26/2014)... The announced sales of three healthcare units ... to expand in non-healthcare areas, says Kalorama Information. Siemens ... firm says that  Siemens is the third largest company ... the IVD market , with 5.5 billion in IVD ... would likely affect IVD market shares.  ...
(Date:11/26/2014)... The ETC (Emerging Technology Centers) ... centers, announced today that applications for AccelerateBaltimore™ (AB) ... “Do you have a big idea?,” asked ETC’s ... know about it. AccelerateBaltimore helps you and your ... just 13 weeks.” Interested game changers with ...
(Date:11/26/2014)... Silicon Valley Electronic Data Capture (EDC) ... Alliance , provider of clinical research and data management ... addition to its CRO Partnership Program, Clinovo expands ... India. , “We have found Clinovo’s ClinCapture to ... platform which is both user friendly and easy to ...
Breaking Biology Technology:Global Smart Sensor Market in Building Automation is expected to reach a value of $1,415.6 million by 2018 - Report by MicroMarket Monitor 2Global Smart Sensor Market in Building Automation is expected to reach a value of $1,415.6 million by 2018 - Report by MicroMarket Monitor 3Global Smart Sensor Market in Building Automation is expected to reach a value of $1,415.6 million by 2018 - Report by MicroMarket Monitor 4Kalorama: Sale of Three Siemens Healthcare Units Raises Questions About Firm's IVD Future 2AccelerateBaltimore Applications to Close in 6 Days 2AccelerateBaltimore Applications to Close in 6 Days 3RPM Alliance Joins Clinovo’s CRO Partnership Program, Further Strengthening Its Presence in Southern California and India 2
... 2011 China PharmaHub Corp. (OTC Bulletin Board: ... today announced that it has signed a exclusive worldwide ... rights to develop, commercialize and market a universal donor ... UCSD Associate Professor of Medicine and Pediatrics Dr. Ewa ...
... FREMONT, Calif. and SAN CARLOS, Calif., March 21, ... WGBS ), a leading developer of ... a leader in innovative genomic samples preparation, today ... integrated workflows for gene expression profiling and target ...
... N.J., March 21, 2011 Intrasphere Technologies ( ... solutions firm that provides services to Life Sciences ... SafetyXpress for Argus is Intrasphere,s proprietary implementation accelerator ... Safety suite. Intrasphere is a Specialized Oracle Argus ...
Cached Biology Technology:China PharmaHub In-Licenses Universal Donor Red Blood Cells Technology Exclusively From University of California, San Diego 2WaferGen and NuGEN Announce Agreement to Co-Develop Integrated Workflows Using SmartChip System and SPIA® for Single Cell Analysis, FFPE and Next Generation Sequencing 2WaferGen and NuGEN Announce Agreement to Co-Develop Integrated Workflows Using SmartChip System and SPIA® for Single Cell Analysis, FFPE and Next Generation Sequencing 3WaferGen and NuGEN Announce Agreement to Co-Develop Integrated Workflows Using SmartChip System and SPIA® for Single Cell Analysis, FFPE and Next Generation Sequencing 4Intrasphere Technologies Launches SafetyXpress(TM) for Oracle(R) Argus Safety 2
Rabbit Serum New Zealand or California Origin...
Collected from 8-12 week old New Zealand or Californian rabbits. Aseptically collected and processed to minimize hemolytic activity. Pricing: $60/unit for 1 - 10 units...
... Synthesis , Containing one Phospho-Amino Acid , ... customer conjugation of peptide to KLH protein , Rabbits ... , Pre-immune bleed x1 /each , ... bleed (app. 5 ml) x1 /each , ...
... Serum • Mouse serum is collected off the clot ... weeks of age. Available Anticoagulants: N-02: ... K2EDTA N-08: Potassium Oxalate N-10: ... ACD N-07: CPD N-09: ...
Biology Products: