Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Climate change a likely culprit in coqui frog's altered calls, say UCLA biologists

15.04.2014

Changes in the Puerto Rican climate over the past three decades have caused small but significant changes to the coqui frog, the territory's national animal. UCLA biologists have found that not only have male coquis become smaller, but their mating call has also become shorter and higher pitched.

Authored by Peter Narins, UCLA distinguished professor of integrative biology and physiology and of ecology and evolutionary biology, and Sebastiaan Meenderink, a UCLA physics researcher, the study examined 170 male coqui frogs (Eleutherodactylus coqui) in 1983 and then 116 males in 2006. The study included frogs found at 28 altitudes in Puerto Rico, ranging from about 10 yards above sea level to more than 1,100 yards above sea level.


This is the coqui frog (Eleutherodactylus coqui) of Puerto Rico.

Credit: Dante Fenolio

The study, the first to show the effect of temperature change on a species of frogs in the tropics over a period of more two decades, was published online April 9 in the journal Proceedings of the Royal Society B, and will appear later in the print edition.

"We think the animal adapted to temperature change by becoming smaller, which we believe causes the differences in their calls," said Meenderink, who was previously a postdoctoral scholar in Narins' laboratory. The male's call is significant because it is used to attract females and to defend territory from other males.

Narins, who has studied the coqui for 41 years, said although the change is not very large, it is statistically significant and may well be a sign of difficult years ahead for the animal. The coqui is so beloved in Puerto Rico that it is the subject of songs and children's stories there.

Now, because of climate change, its reproductive success is likely to decrease substantially, the scientists predict.

"If current trends continue unabated, the coqui frog will sound and look quite different before this century is over," said Narins, a faculty member in the UCLA College of Letters and Science.

The scientists found that frogs at comparable altitudes are more than 10 percent smaller in length than they were 23 years earlier. Using data from four weather stations in Puerto Rico, the researchers also learned that the temperatures increased by almost 0.5 degrees Fahrenheit over that time. Although that amount of warming doesn't sound like much, it is meaningful over such a brief period of time. If it continues or worsens in coming decades, it could be very dangerous for the coqui, whose existence dates back more than 11,000 years, and perhaps much longer than that.

According to Narins, some 30 percent of the world's more than 6,300 species of frogs and toads are endangered for a variety of reasons including climate change, chemical contamination of the water supply, destruction of their habitats and exposure to deadly fungi. In addition to their own intrinsic value, many of the species are important because scientists can study them to discover new treatments for disease. That opportunity would be lost if the animals become extinct.

In addition, the changes affecting the coqui could have an adverse effect on Puerto Rico's food chain, because owls, snakes, land crabs and other animals dine on the animal.

###

The research was funded by the National Institutes of Health (grant R01DC00222), the UCLA Academic Senate and the Netherlands Organisation for Scientific Research (grant NWO-VENI 863.08.003).

Stuart Wolpert | Eurek Alert!
Further information:
http://www.ucla.edu

Further reports about: Climate Coqui Frog Eleutherodactylus UCLA animals species temperature tropics

More articles from Life Sciences:

nachricht The birth of a new protein
20.10.2017 | University of Arizona

nachricht Building New Moss Factories
20.10.2017 | Albert-Ludwigs-Universität Freiburg im Breisgau

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Terahertz spectroscopy goes nano

20.10.2017 | Information Technology

Strange but true: Turning a material upside down can sometimes make it softer

20.10.2017 | Materials Sciences

NRL clarifies valley polarization for electronic and optoelectronic technologies

20.10.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>