Monday 21 June 2021

Scientists Rediscover Critically Endangered Frog in Costa Rica

Adult male of the South Pacific streamside frog. Photo by: Gerardo Chaves
Adult male of the South Pacific streamside frog. Photo by: Gerardo Chaves

COSTA RICA JOURNAL  (EPOCH TIMES)  In the past 20 years, amphibian species around the world have experienced rapid decline due to climate change, disease, invasive species, habitat loss and degradation. Populations have decreased by approximately 40 percent with nearly 200 species thought to have gone extinct since 1980. However, despite these discouraging statistics, new research efforts are turning up lost populations of some vanished frogs.

A new study published in mongabay.com’s open-access journal Tropical Conservation Science reports the rediscovery of two new populations of the South Pacific streamside frog (Craugastor Taurus) in southeastern Costa Rica. This marks the first sighting of the species since 1997.

- Advertisement -

“The rediscovery of [the South Pacific streamside frogs] is one of eight recent discoveries of lost frogs in Costa Rica, which include the endemic and believed to be extinct Holdridge’s toad (Incilius holdridgei),” the researchers write in the study “The non-detection of [South Pacific streamside frogs] in historical streams is troubling, but the discovery of two populations in a new location is encouraging news.”

The new study also finds that breeding populations of the South Pacific streamside frog persist with high prevalence of the fungal disease, chytridiomycosis, caused by Batrachochytrium dendrobatidis (Bd). Past research indicates that this fungal disease was the main cause of the 1987 mass die-off of amphibians in Costa Rica, in which at least 17 species experienced population declines. Historically, frogs most vulnerable to fungal disease Bd lived along streams and at altitudes higher than 500 meters. However, some scientists consider the amphibian population decline in Costa Rica enigmatic because some declines occurred in low elevation areas where fungal disease Bd was not deemed as threatening.

The study used several methods to relocate South Pacific streamside frogs, also known as the Golfito robber frog, in southeastern Costa Rica. First, researchers reviewed museum specimen records discovering that the species inhabited 34 streams from 1963 and 1990. Then between 2000 and 2012, they sampled 47 streams and tributaries within the range of the frog.

In addition, the researchers conducted field surveys at Punta Banco in far southeastern Costa Rica taking voucher specimens from two different stream locations. The specimens were housed and identified at the Museo de Zoologia at Universidad de Costa Rica. Scientists used these new findings and historical distribution records to establish the past and current distribution range of the South Pacific streamside frog. Furthermore, the researchers performed Bd sampling by swabbing fifteen frogs. The swabs were stored in a dry and frozen state then DNA analysis was conducted at the Vredenburg Lab at San Francisco State University.

- Advertisement -

In all, the scientists uncovered two new populations of South Pacific streamside frogs, occurring in areas with a drier environment than those of its historic range. The researchers also found Bd fungal disease on twelve of the fifteen frogs with varying degrees of infection.

The rediscovery of the streamside frog is significant because the scientists have uncovered new habitat records that show surviving populations are able to live with a high prevalence and infection of the fungal disease Bd. But, most importantly, these are now the only known populations of the Critically Endangered species.

But the researchers write that more hidden populations may survive.

“Continuous sampling within the historic range might result in the discovery of additional populations. We emphasis that much more fieldwork needs to be done in order to explain the uniqueness of these two extant populations.”

- Advertisement -

FACT CHECK:
We strive for accuracy in its reports. But if you see something that doesn’t look right, send us an email. The Q reviews and updates its content regularly to ensure it’s accuracy.

Ricohttp://www.theqmedia.com
"Rico" is the crazy mind behind the Q media websites, a series of online magazines where everything is Q! In these times of new normal, stay at home. Stay safe. Stay healthy.

Related Articles

Today’s Vehicle Restriction June 20: only “EVENS” can circulate

Today, Sunday, June 20, only vehicles with "EVEN" ending plates CAN...

Internet speed decreases during peaks in service

QCOSTARICA - Ever wonder why your surfing on the Internet slows...

MOST READ

Today’s Vehicle Restriction June 15: 3 & 4 CANNOT circulate

Today, Tuesday, June 15, vehicles with plates ending 3 & 4 CANNOT circulate The measure is countrywide and applied between 5:00 am and 9:00 pm,...

Diseases, weather and low prices hit the orange sector in Costa Rica

HQ - The appearance of pests and diseases, in particular the 'dragón amarillo' (yellow dragon), the impact of the weather and a sharp drop...

13 Powerful Home Remedies for Acne

Acne is considered to be one of the most common skin ailments on the planet, with a record 60 million people being afflicted by...

Central America is back in the news for the wrong reasons, Costa Rica is once again the exception

QCOSTARICA - Osta Rica has been the epicenter of regional diplomacy in recent days. The successive visits of the Secretary of State of the...

Informants assisted OIJ in corruption investigations, says the minister

QCOSTARICA - The investigation into alleged bribery of public officials in exchange for contracts for road works, received help from informants within the Consejo...

Fifth tropical wave precipitation will be heavier in the north of the country

QCOSTARICA - For this Wednesday, the arrival of the fifth tropical wave of the season is expected, thus reinforcing the rainy activity mainly to...

Despite investigation, construction of road works by H. Solís will continue

QCOSTARICA - Five major road works under the responsibility of the H. Solís company will continue in development despite investigations for alleged corruption involving...

“Caso Cochinilla”: Name arose when comparing parasite with hidden corruption

QCOSTARICA - On Monday, the Organismo de Investigacion Judicial (OIJ) moved to the raid, seize and arrest of their investigation into corruption of public...

Ortega government accuses imprisoned opponents of receiving money from the United States to overthrow him

TODAY NICARAGUA – The Nicaraguan government assures that the imprisoned political opponents detained on charges of “inciting foreign intervention” are “usurpers” financed by the...

WANT TO STAY UP TO DATE WITH THE LATEST!

Get our daily newsletter with the latest posts directly in your mailbox. Click on the subscribe and fill out the form. It's that simple!

Log In

Forgot password?

Forgot password?

Enter your account data and we will send you a link to reset your password.

Your password reset link appears to be invalid or expired.

Log in

Privacy Policy

Add to Collection

No Collections

Here you'll find all collections you've created before.