Tag Archives: Limosa harlequin frog

Rescue Project Successfully Breeds Endangered Frog Species

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Limosa harlequin frog (Atelopus limosus) baby on a U.S. quarter.

Limosa harlequin frog (Atelopus limosus) baby on a U.S. quarter. (Photo by Brian Gratwicke, Smithsonian Conservation Biology Institute)

The limosa harlequin frog (Atelopus limosus), an endangered species native to Panama, now has a new lease on life. The Panama Amphibian Rescue and Conservation Project is successfully breeding the chevron-patterned form of the species in captivity for the first time. The rescue project is raising nine healthy frogs from one mating pair and hundreds of tadpoles from another pair.

“These frogs represent the last hope for their species,” said Brian Gratwicke, international coordinator for the project and a research biologist at the Smithsonian Conservation Biology Institute, one of six project partners. “This new generation is hugely inspiring to us as we work to conserve and care for this species and others.”

Nearly one-third of the world’s amphibian species are at risk of extinction. The rescue project aims to save priority species of frogs in Panama, one of the world’s last strongholds for amphibian biodiversity. While the global amphibian crisis is the result of habitat loss, climate change and pollution, a fungal disease, chytridiomycosis, is likely responsible for as many as 94 of 120 frog species disappearing since 1980.

Between its facilities at the Smithsonian Tropical Research Institute in Gamboa, Panama, and the El Valle Amphibian Conservation Center in El Valle, Panama, the rescue project currently cares for 55 adult limosa harlequin frogs of the chevron-patterned form and 10 of the plain-color form. The project has had limited success breeding the plain-color form of this species, and has successfully bred other challenging endangered species, including crowned treefrogs (Anotheca spinosa), horned marsupial frogs (Gastrotheca cornuta) and toad mountain harlequin frogs (A. certus).

Each species requires its own unique husbandry to thrive and breed. The project’s animal care team and scientists learn husbandry techniques as they work with a limited number of individuals. Jorge Guerrel, conservation biologist at the Smithsonian Tropical Research Institute, arranged rocks in the breeding tank to create the submerged caves that appear to be the preferred egg deposition sites for limosa harlequin frogs. Like other Atelopus species, tadpoles require highly oxygenated, gently flowing water between 22 and 24 degrees Celsius. The tadpoles’ natural food is algal film growing on submerged rocks, which Guerrel and his colleagues re-created by painting petri dishes with a solution of powdered spirulina algae, then allowing it to dry.

The mission of the Panama Amphibian Rescue and Conservation Project is to rescue amphibian species that are in extreme danger of extinction throughout Panama. The project’s efforts and expertise are focused on establishing assurance colonies and developing methodologies to reduce the impact of the amphibian chytrid fungus so that one day captive amphibians may be reintroduced to the wild. Current project partners include Cheyenne Mountain Zoo, Houston Zoo, Smithsonian’s National Zoological Park, Smithsonian Tropical Research Institute and Zoo New England.

Lindsay Renick Mayer, Smithsonian’s National Zoo

Cute in any form.

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Limosa harlequin frog (Atelopus limosus)

Highland color-form of the Limosa harlequin frog (Atelopus limosus)

Cute Frog of the Week: May 30, 2011

Camouflaged among the moss-covered rocks in the highlands and lowlands of Panama, the Limosa harlequin frog (Atelopus limosus) is difficult to spot even with its yellow clinging toes. These green-and-black-eyed amphibians leave their superb hiding places during the dry season and make their way to the fast-flowing streams of the Panamanian rainforest. Females lay their eggs in streambeds, where eager males wait to fertilize them. Laying clutches of eggs in faster-flowing waters may seem treacherous for the tiny frogs, but they brave the risk. Eggs that are laid in those areas of streams are less likely to be preyed upon, or to face competition from other frog species.

Limosa harlequin frog (Atelopus limosus)

Lowland color-form of the Limosa harlequin frog (Atelopus limosus)

Limosa harlequin frog tadpoles are not left to be swept away by hurried streams once they hatch. Suction disks on their bellies help anchor them to the rocks in the streambeds. However, the species seems to be losing its grip in its fight to survive. It is listed as endangered in the wild and the population is still decreasing. It is facing threats ranging from deforestation to pollution. Those threats are compounded by the ravaging affects of the chytrid fungus.  The Panama Amphibian Rescue and Conservation Project has brought the Limosa harlequin frog into captivity and is learning how to successfully breed them, giving hope for the survival of the species.

Photo credit: Brian Gratwicke, Panama Amphibian Rescue and Conservation Project

Every week the Panama Amphibian Rescue and Conservation Project posts a new photo of a cute frog from anywhere in the world with an interesting, fun and unique story to tell. Be sure to check back every Monday for the latest addition.

Send us your own cute frogs by uploading your photos here: http://www.flickr.com/groups/cutefrogoftheweek/

Notes from the Field: Finding the Limosa harlequin frog

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Jenyva Turner, Cheyenne Mountain Zoo animal keeper

Jenyva shows off an Atelopus limosus the Cheyenne Mountain Zoo team captured during the February expedition. (Photo courtesy of the Cheyenne Mountain Zoo)

Wanted: Adventurous expedition members to hike into the jungles of Panama looking for the rare Atelopus limosus. Must be willing to hike long hours in rugged, muddy terrain and in thigh-deep water, and ready to be wet, hungry, tired, and not afraid of spiders, snakes, scorpions, and lots of insects.

SIGN ME UP!!!

How could I pass up an opportunity to hike, explore, and camp in the jungle, all while helping save a species? This February was my first trip to Panama, however I followed the blog posts from other Cheyenne Mountain Zoo team members during previous expeditions to Panama, so I felt like I had already been there. I knew it was going to be a challenging trip, both physically and mentally. Would we find frogs? That was my biggest concern. As we all know, the chytrid fungus is taking its toll on frog populations around the world and the rare Atelopus limosus is not immune to chytrid’s deadly sting.

Atelopus limosus was our target species since the Panama Amphibian Rescue and Conservation Project only had one female and four males in captivity. The future of the species appeared to depend on our findings. It was the “dry season” in Panama (although, being from Colorado, rain every day does not seem very “dry”!) and therefore, was the best time to find females, as they would be coming down to the streambeds to lay their eggs. The males would be there waiting.

We hiked along the stream and carefully searched the moss-covered rocks for the small, highly camouflaged black and green frogs. It was tough to be quiet and sneak up on our target as we sloshed around streambeds, stepped over branches, and slipped on rocks. We paid especially close attention to areas of the stream where the water moved a little faster. Atelopus limosus lay their eggs in faster-moving water to reduce competition from other frog species and reduce predation. The tadpoles are specially designed with little suction cup disks on their bellies to help them hold onto the rocks and keep them from being washed away. Pretty cool!

Our team found just four Atelopus limosus during our time in the field, but we were able to give hope to the species as one of those caught was a young female. We handed off our precious cargo to the capable staff at the Summit Zoo, who take their job and role in frog conservation very seriously. They are working hard to care for and propagate many other amphibian species besides Atelopus limosus to ensure the sounds of frogs continue to be heard in the jungles of Panama.

Here’s a video of Antonia Chastain, a member of the Cheyenne Mountain Zoo team, finding out first-hand how difficult it is to catch an Atelopus limosus during the February trip:

—Jenyva Turner, Cheyenne Mountain Zoo animal keeper (and first-time frog finder!)

An update from Summit Zoo

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Toad Mountain harlequin frogs

A pair of the project's Toad Mountain harlequin frogs (Atelopus certus) were in amplexus for about 100 days and recently produced a clutch of eggs. (Photo by: Jorge Guerrel, Panama Amphibian Rescue and Conservation Project)

Hi amigos!

We are glad to give you the latest update on what is going on with our frogs here at the Panamanian Rescue and Conservation Project at the Summit Zoo in Panama. And we are going to start with some great news: After almost 100 days of a very long amplexus (from the latin “embrace,” amplexus is a form of pseudocopulation in which a male amphibian grasps a female with his front legs as part of the mating process), we have our very first Toad Mountain harlequin frog (Atelopus certus) clutch!

This is huge news especially since A. certus is facing a very high risk of extinction in the wild and is classified as “endangered” by the IUCN Red List of Threatened Species. The Toad Mountain harlequin frog is an endemic species from the Darien region of eastern Panama and little is known about its reproductive and breeding behavior. From observations made here at the Summit Zoo in Panama, we have noticed some interesting behavior. For example, during amplexus, the male A. certus holds on to the female so tight that he won’t eat for three months or more. We are taking notes and paying attention to the smallest change in water quality and temperature in their tank to assure the largest number of juveniles possible.

La loma tree frog morph

The rescue project is the first ever to successfully breed the La loma tree frog. (Photo by: Jorge Gurrel)

The rest of the group is doing just fine. The La loma treefrog (Hyloscirtus colymba) tadpoles are growing and some have fully developed legs, though we still need to wait until they come out of the water and absorb the tail to place them in their new individual tanks. The baby Limosa harlequin frogs (Atelopus limosus) are bigger and stronger–they have been eating lots of springtails and we are making sure that UV light is always available to them to prevent any bone disease.

The male adults are calling very often, especially early in the morning for our diurnal species, such as the Pirre harlequin frog (Atelopus glyphus). The rest of the harlequin frogs, H. colymba and our single male Bob’s robber frog (Craugastor punctariolus) call to attract their females throughout the night, particularly when is raining. We are also testing a few ways to feed the big C. punctariolus so we can offer them a variety of food as part of their diet.

Thanks to our collaborators and volunteers for all their suggestions and new ideas.

That’s all for now, but we will continue to keep you updated. Thanks for your support!

-Angie Estrada, Panama Amphibian Rescue and Conservation Project

Rescue Project First to Breed Critically Endangered Tree Frog

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Atelopus limosus

The Panama Amphibian Rescue and Conservation Project has successfully bred the endangered Limosa harlequin frog, Atelopus limosus. (Credit: Angie Estrada, Panama Amphibian Rescue and Conservation Project)

As frogs around the world continue to disappear—many killed by a rapidly spreading disease called chytridiomycosis, which attacks the skin cells of amphibians—one critically endangered species has received an encouraging boost. Although the La Loma tree frog, Hyloscirtus colymba, is notoriously difficult to care for in captivity, the Panama Amphibian Rescue and Conservation Project is the first to successfully breed this species.

“We are some of the first researchers to attempt to breed these animals into captivity and we have very little information about how to care for them,” said Brian Gratwicke, international coordinator for the project and a research biologist at the Smithsonian’s National Zoo, one of nine project partners. “We were warned that we might not be able to keep these frogs alive, but through a little bit of guesswork, attention to detail and collaboration with other husbandry experts—we’ve managed to breed them. The lessons we’re learning have put us on target to save this incredible species and our other priority species in Panama.”

The rescue project currently has 28 adult La Loma tree frogs and four tadpoles at the Summit Municipal Park outside of Panama City, Panama. In addition to the La Loma tree frog, the project also has successfully bred the endangered Limosa harlequin frog, Atelopus limosus. Keepers will continue to carefully monitor the tadpoles of both species.

H. colymba

Although the La Loma tree frog, Hyloscirtus colymba, is notoriously difficult to care for in captivity, the rescue project is the first to successfully breed this species. (Credit: Brian Gratwice, Smithsonian's National Zoo)

Nearly one-third of the world’s amphibian species are at risk of extinction. The rescue project aims to save more than 20 species of frogs in Panama, one of the world’s last strongholds for amphibian biodiversity. While the global amphibian crisis is the result of habitat loss, climate change and pollution, chytridiomycosis is likely at least partly responsible for the disappearances of 94 of the 120 frog species thought to have gone extinct since 1980.

“Although the outlook for amphibians is grim, the rescue project’s recent developments give us hope for these unique Panamanian species,” said Roberto Ibáñez, local director of the project and a scientist at the Smithsonian Tropical Research Institute, one of the project’s partners. “We are creating what amounts to an ark for these animals so that their species may survive this deadly disease. We’re also looking for a cure so that someday we can safely release the frogs back into the wild.”

Of Panama’s six harlequin frog species, five are in collections at the Summit Zoological Park and the El Valle Amphibian Conservation Center in El Valle, Panama. One species, the Chiriqui harlequin frog, A. chiriquiensis, from western Panama, is likely extinct. The other species range from being extinct in the wild—the Panamanian golden frog, A. zeteki—to being endangered.

The mission of the Panama Amphibian Rescue and Conservation Project is to rescue amphibian species that are in extreme danger of extinction throughout Panama. The project’s efforts and expertise are focused on establishing assurance colonies and developing methodologies to reduce the impact of the amphibian chytrid fungus so that one day captive amphibians may be reintroduced to the wild. Project participants include Africam Safari, Panama’s Autoridad Nacional del Ambiente, Cheyenne Mountain Zoo, Defenders of Wildlife, El Valle Amphibian Conservation Center, Houston Zoo, Smithsonian’s National Zoological Park, Smithsonian Tropical Research Institute, Summit Municipal Park and Zoo New England.

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Media only: contact Lindsay Renick Mayer, Smithsonian’s National Zoo, 202-633-3081