Navigation Links
Caribbean frogs started with a single, ancient voyage on a raft from South America


Red frog from mountains of Haiti. Eleutherodactylus audanti, from
Massif de la Selle.
Nearly all of the 162 land-breeding frog species on Caribbean islands, including the coqui frogs of Puerto Rico, originated from a single frog species that rafted on a sea voyage from South America about 30-to-50-million years ago, according to DNA-sequence analyses led by a research group at Penn State, which will be published in the 12 June 2007 issue of the Proceedings of the National Academy of Sciences and posted in the journal's online early edition this week. Similarly, the scientists found that the Central American relatives of these Caribbean amphibians also arose from a single species that arrived by raft from South America.

"This discovery is surprising because no previous theories of how the frogs arrived had predicted a single origin for Caribbean terrestrial frogs and because groups of close relatives rarely dominate the fauna of an entire continent or major geographic region," explained Penn State's Blair Hedges, the evolutionary biologist and professor of biology who directed the research. "Because land connections among continents have allowed land-dwelling animals to disperse freely over millions of years, the fauna of any one continent is usually a composite of many types of animals."
Yellow and black spotted frog from caves in Haiti. Eleutherodactylus
counouspeus
.

The field work for the study required nearly three decades to complete because many of the species are restricted to remote and isolated mountain tops or other inaccessible areas. Some species included in the study now are believed to be extinct because of habitat degradation and possibly other causes such as climate change. A recent global assessment of amphibians found that the Caribbean Islands have the highest proportion of amph
'"/>

Source:Penn State


Page: 1 2 3 4

Related biology news :

1. Parts of the Caribbean and Central America are likely to have less summer rain
2. A whole lot of shaking goin on triggers early hatching in red-eyed tree frogs
3. Picky female frogs drive evolution of new species in less than 8,000 years
4. Laos ?a lost world for frogs
5. Rare Chinese frogs communicate by means of ultrasonic sound
6. Crucial site for endangered frogs and birds saved
7. Study shows frogs can play key role in stem cell research
8. Leptin found to control appetite and limb development in frogs
9. Race to halt global amphibian crisis boosted by rediscovery of endangered Colombian frogs
10. Researchers find missing genes of ancient organism
11. Family trees of ancient bacteria reveal evolutionary moves
Post Your Comments:
(Date:4/27/2015)... LAUDERDALE, Fla. , Apr. 27, 2015 ... of access control and security systems is pleased to ... the company as a consultant and member of its ... is widely known as a thought leader in ... Distance Learning Technology Group, and has published studies and ...
(Date:4/14/2015)... YORK , April 14, 2015  HYPR ... IDentity Online (FIDO ® ) Alliance tm , ... specifications. FIDO members commit to share technology and ... methods that are interoperable, more secure and private, ... enable biometric identity verification that protects sensitive user ...
(Date:4/9/2015)... Calif. , April 9, 2015 Synaptics ... interface solutions, announced today that it will report financial ... Thursday, April 23, 2015, after the close of market. ... analysts and investors at 2:00 p.m. PT (5:00 p.m. ... To participate on the live call, analysts ...
Breaking Biology News(10 mins):Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 2Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 3Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 4HYPR Corp. Joins the FIDO Alliance 2HYPR Corp. Joins the FIDO Alliance 3Synaptics to Report Third Quarter Results on April 23 2
... in partnership with Rothamsted Research have officially joined forces ... how can we sustainably feed a growing population? ... the House of Commons on 26 October amidst reports ... reaching seven billion. The Alliance brings together world-class ...
... 28 2011 the research icebreaker Polarstern sets off on ... from research institutions in 14 countries will take part ... wide variety of topics: oceanography and marine chemistry, atmospheric ... animals all the way to crustaceans, fish and whales. ...
... luxuriously thick winter coat, reindeer are perfectly prepared for the ... just keep the cold out, it keeps the warmth in ... what happens when they are active and generating heat? Usain ... do exercising reindeer avoid overheating? Arnoldus Blix from the University ...
Cached Biology News:UK scientists come together to help feed the 7 billion 2UK scientists come together to help feed the 7 billion 3UK scientists come together to help feed the 7 billion 4UK scientists come together to help feed the 7 billion 5RV Polarstern launches 28th Antarctic season 2Rudolph the red-nosed reindeer's cooling strategy revealed 2
(Date:5/20/2015)... Mass. , May 20, 2015  Haemonetics Corporation ... Concannon , President & CEO, will present at The ... York on June 1 st , 2015 ... may access Mr. Concannon,s presentation live via webcast at: ... Haemonetics (NYSE: HAE ) is a global ...
(Date:5/20/2015)... May 20, 2015  Resolution Bioscience announced today the ... ALK TM , a blood-based liquid biopsy for an ... carcinoma (NSCLC), the most common form of this cancer. ... guide patients to personalized therapies and direct them into ... The Department of Health, the CLIA authority in ...
(Date:5/20/2015)... North Carolina , 20. Mai ... Unternehmen für klinische Logistik (Clinical Logistics ... das Geschäftsjahr 2014, das am 31. ... Das Unternehmen hat die Marktentwicklung übertroffen ... Logo - http://photos.prnewswire.com/prnh/20110930/NY78064LOGO ...
(Date:5/20/2015)... Winston-Salem, NC (PRWEB) May 20, 2015 ... Winston-Salem, NC based not-for-profit organization, is pleased to announce ... International Clinical Trials Day. These donations represent the effort ... a study at the GGI partner sites in 2014. ... and highlight the greater good of clinical trial participation, ...
Breaking Biology Technology:Resolution Bioscience Receives CLIA Certification for its Diagnostic Laboratory and Launches CLIA-Certified Liquid Biopsy for Lung Cancer 2Marken schließt Ergebnisse für das Geschäftsjahr 2014 ab 2The Greater Gift Initiative Donates over 10,000 Vaccines in Honor of International Clinical Trials Day 2
... , LONDON, November 9 ... US Food and Drug Administration (FDA), privately,owned UK company ... its innovative,anti-inflammatory agent AIMSPRO(R) has been awarded an Orphan-Drug,designation ... ALS, also known as Lou ...
... , LYNBROOK, N.Y., Nov. 6 BioSpecifics Technologies Corp. ... collagenase-based products, today announced its financial results for the ... were extremely happy that, in September of this year, ... vote of 12-0, the approval of XIAFLEX(TM) for the ...
... announced today that it has been awarded a Small Business ... Medical Research and Material command. Under terms of the agreement, ... of Dengue virus. , Dengue virus is ... forces deployed to tropical areas of the world. Due to ...
Cached Biology Technology:Reissue with Tables: BioSpecifics Technologies Corp. Reports Third Quarter 2009 Financial Results 2Reissue with Tables: BioSpecifics Technologies Corp. Reports Third Quarter 2009 Financial Results 3Reissue with Tables: BioSpecifics Technologies Corp. Reports Third Quarter 2009 Financial Results 4Reissue with Tables: BioSpecifics Technologies Corp. Reports Third Quarter 2009 Financial Results 5Reissue with Tables: BioSpecifics Technologies Corp. Reports Third Quarter 2009 Financial Results 6Calbiotech Awarded U.S. Army Phase I SBIR Research Contract to Develop Analyte Specific Reagents for the Diagnosis of Dengue Fever Virus 2
... SMZ line is a Greenough stereomicroscope designed for ... is available with a choice of a large ... base (N2GG). This microscope can be easily connected ... at the same time giving you ultimate flexibility. ...
... siRNA applications, contains magnetic nanoparticles (MagTag) which ... of interest. Exploiting magnetic force the full ... towards and delivered into the target cells ... be used for adherent cells; for suspension ...
...
... TNT Coupled Reticulocyte Lysate Systems(a,b,c,d) offer ... vitro translations: a single-tube, coupled transcription/translation ... simplify the process and reduce the ... translation results. Standard rabbit reticulocyte lysate ...
Biology Products: