Extant amphibians. Medical search. Frequent questions

Today amphibians are represented by frogs and toads (order Anura ), newts and salamanders (order Caudata ), and caecilians (order Gymnophiona ). (britannica.com)
Frogs and other amphibians have thrived on the planet for over 350 million years, adjusting to dramatic changes to their world over the millennia. (usgs.gov)
Using data from the North American Amphibian Monitoring Program (NAAMP), a citizen-science volunteer project that collected data on the presence or absence of frogs in areas of the eastern U.S. over 15 years, the researchers discovered that most species had increased presence in years with warmer than average temperatures and heavier snowfall. (usgs.gov)
Dozens of species of frogs, salamanders and other amphibians quietly disappeared from parts of Latin America in the 1980s and 2000s, with little notice from humans, outside of a small group of ecologists. (ucdavis.edu)
Some frogs, salamanders and other amphibians eat hundreds of mosquito eggs each day. (ucdavis.edu)
A large-scale phylogeny of Amphibia including over 2,800 species, and a revised classification of extant frogs, salamanders, and caecilians. (wikimedia.org)
Some snakes have a taste for amphibians, including frogs and their eggs. (wildanimalscentral.com)
Frogs and their eggs: Some snakes primarily consume amphibians, such as frogs and their eggs. (wildanimalscentral.com)
Modern caecilians are a clade , the order Gymnophiona / dʒ ɪ m n ə ˈ f aɪ ə n ə / (or Apoda / ˈ æ p ə d ə / ), one of the three living amphibian groups alongside Anura ( frogs ) and Urodela ( salamanders ). (uraniumorien351.click)
Frogs and salamanders show many similarities to dissorophoids , a group of extinct amphibians in the order Temnospondyli . (uraniumorien351.click)

Amphibian populations are declining globally at an alarming rate. (nih.gov)
From the early 1980s to the mid-1990s, a deadly fungal pathogen called Batrachochytrium dendrobatidis , or "Bd," traveled across Costa Rica, devastating amphibian populations. (ucdavis.edu)
Climate change is making life more difficult for specialized amphibians of all kinds, and amphibian chytrid fungus, an infection that is helping to wipe out populations around the globe, afflicts as much as 50 percent of extant amphibians. (scientificamerican.com)
By the time most researchers realized the extent of the decline in amphibian populations, the amphibians themselves had disappeared. (grasscity.com)
In contrast with the well documented strain on extant amphibian and reptile populations today, the Quaternary fossil record of these groups is very conservative showing few changes over long periods of time. (palass.org)
Only 6 of the 22 extant populations south of Ventura are known to contain more than a dozen adults (Jennings and Hayes 1994). (amphibiaweb.org)
This preference can have a significant impact on amphibian populations in the rainforest. (wildanimalscentral.com)
As snakes consume amphibians, it can result in a decrease in amphibian populations, which can disrupt the ecological balance of the rainforest. (wildanimalscentral.com)
With the evidence of decline in amphibian populations caused by habitat changes, Brazilian hotspots need to be studied in order to increase knowledge about the group and provide better prospects for conservation. (bvsalud.org)

New research published today, on 7 th July 2022, in PLOS ONE has discovered the extent to which common toads live in trees. (froglife.org)
Common toads are regarded as typical terrestrial amphibians and as such are known to spend their time both on land and in water during breeding. (froglife.org)
Consequently, common toads and in general UK amphibians have never been surveyed for in trees, unlike bat and dormouse surveys which specifically target such habitat. (froglife.org)
These findings are significant and very exciting for our understanding of the ecology and conservation of common toads, one of the most widespread and abundant European amphibians. (froglife.org)
Further, targeted research will enable scientists to better understand the reasons for this behaviour and the impact on woodland management for common toads and other amphibians. (froglife.org)
Most of the amphibians they discovered were common toads - with 30 discovered in dormice sites and 19 discovered in tree cavities. (ecowatch.com)
This is a really exciting finding, and significant for our understanding of the ecology and conservation of common toads - one of the most widespread and abundant European amphibians," University of Cambridge senior researcher and Froglife trustee Dr. Silviu Petrovan said in the press release. (ecowatch.com)
Amphibians such as Arroyo Toads are thus vulnerable to local and regional extinction in ephemeral freshwater systems (Written by David B. Wake). (amphibiaweb.org)

amphibian , (class Amphibia), any member of the group of vertebrate animals characterized by their ability to exploit both aquatic and terrestrial habitats . (britannica.com)
Class Amphibia Gray , 1825. (wikimedia.org)

The first global assessment of amphibians provides new context for the well-publicized phenomenon of amphibian declines. (nih.gov)
The lack of conservation remedies for these poorly understood declines means that hundreds of amphibian species now face extinction. (nih.gov)
Pesticide Mixtures, Endocrine Disruption, and Amphibian Declines: Are We Underestimating the Impact? (nih.gov)
Although it cannot be determined whether all the pesticides in the mixture contribute to these adverse effects or whether some pesticides are effectors, some are enhancers, and some are neutral, the present study revealed that estimating ecological risk and the impact of pesticides on amphibians using studies that examine only single pesticides at high concentrations may lead to gross underestimations of the role of pesticides in amphibian declines. (nih.gov)
Funded by the National Science Foundation, the study suggests that this fungal infection may be the prime suspect in amphibian declines, but Vredenburg says it also offers a way to test whether climate change may have played an indirect role. (grasscity.com)

Phylogenetics, classification, and biogeography of the treefrogs (Amphibia: Anura: Arboranae). (wikimedia.org)
Una revisión de anfibios extintos y actuales en estado fósil (Allocaudata, Anura y Caudata) ha permitido detectar diversos casos que precisan cambios nomenclaturales a fin de estabilizar la taxonomía del grupo. (csic.es)

Approximately 8,100 species of living amphibians are known. (britannica.com)

To what extent can life history characteristics of the host predict global patterns of disease-related population decline among amphibian species? (cdc.gov)
Yet the amphibian decline had direct health consequences for people, according to a study from the University of California, Davis. (ucdavis.edu)
Globally, the pathogen led to the extinction of at least 90 amphibian species, and to the decline of at least 500 additional species. (ucdavis.edu)
Figure 2 from the study shows the date of the pathogen-driven amphibian decline across Costa Rica and Panama. (ucdavis.edu)
All individuals are in fewer than ten locations, and there is likely to be continuing decline in the extent and quality of its forest habitat in southeastern Madagascar. (amphibiaweb.org)
Vulnerable: extent of occurrence is less than 20,000 km 2 , its distribution is severely fragmented, and there is continuing decline in the extent and quality of its habitat in northwestern Madagascar. (amphibiaweb.org)
Also, conceiving and leading the Global Amphibian Assessment, he warned that the decline in the number of amphibians indicates that not only their habitats but also the surrounding ecosystems are deteriorating. (or.jp)

The Chiriqui harlequin frog is among the many species of amphibians that disappeared from the Talamanca highlands of Costa Rica and Panama following the arrival of Bd, a fungal pathogen. (ucdavis.edu)
We now know that the pathogen isn't going to drive every amphibian to extinction,' Vredenburg said, 'but we want to know why. (grasscity.com)
I examined the presence and absence of the amphibian pathogen Batrachochytrium dendrobatidis in three survey areas in Eastern Tennessee. (utc.edu)

This amphibian chytrid fungus continued its path eastward across Panama through the 2000s. (ucdavis.edu)

Amphibians are more threatened and are declining more rapidly than either birds or mammals. (nih.gov)
We're used to discovering woodland birds and other small mammals in nest boxes but we hadn't considered finding amphibians in them. (froglife.org)
Most of the protected areas set up with birds, mammals and amphibians in mind likely have helped to protect many threatened reptiles as well, and the situation is less dire than it could be," says Young. (newscientist.com)
Based on mtDNA divergence from 37 lineages, however, the median estimated divergence time across the EC-MA was 3.26 Ma (SE = 2.84) in amphibians, 2.58 Ma (SE = 1.81) in birds, 2.99 Ma (SE = 4.68) in reptiles and 1.43 Ma (SE = 1.23) in mammals. (biorxiv.org)
Using Bayes Factors, the hypothesis for a single temporal divergence interval containing synchronous divergence events was supported for mammals and but not supported for amphibians, non-avian reptiles, or birds. (biorxiv.org)
We discuss alternative explanations, including dispersal through mountain passes, and suggest that changes in the climatic conditions during the Pliocene and Pleistocene interacted with tetrapod physiology, promoting older divergences in amphibians and reptiles relative to mammals and birds on an already established orogen. (biorxiv.org)

Global emergence of Batrachochytrium dendrobatidis and amphibian chytridiomycosis in space, time, and host. (cdc.gov)

Though some aspects of the biology and anatomy of the various amphibian groups might demonstrate features possessed by reptilian ancestors, amphibians are not the intermediate step in the evolution of reptiles from fishes . (britannica.com)
A one page color illustrated fact sheet featuring endangered fishes, reptiles, amphibians and invertebrates of Australia, plus a page of 6 discussion questions for upper elementary/middle school and a page of completion and multiple choice questions for elementary students. (abcteach.com)
Restore critical spring and riparian habits to pre-agricultural conditions for native fishes, amphibians and springsnails in Oasis Valley, Amargosa Canyon, Ash Meadows, and Shoshone/Tecopah. (nature.org)

The name amphibian , derived from the Greek amphibios meaning "living a double life," reflects this dual life strategy-though some species are permanent land dwellers, while other species have a completely aquatic mode of existence. (britannica.com)
In addition to having highly permeable skin (which makes amphibians particularly vulnerable to chemical contaminants), amphibians also typically reproduce and pass through critical hormone-regulated developmental stages while in the aquatic environment. (nih.gov)
Ponds were established with terrestrial (e.g. bamboo) and aquatic vegetation, and "seeded" with fish, amphibians, and snails. (conservationevidence.com)
The Herpetological Research Team focuses on issues related to conservation and management of amphibians and other aquatic and semi-aquatic species. (usgs.gov)
Second intermediate hosts are typically aquatic animals that feed on copepods (e.g., fish, amphibians), and paratenic hosts are usually animals that prey on these second intermediate hosts (e.g., snakes, birds). (cdc.gov)

Field Guide to the Amphibians and Reptiles of Madagascar. (amphibiaweb.org)
Amphibians and Reptiles of Madagascar. (amphibiaweb.org)

Reptilian & Amphibian Hearts", undated [ca 193? (nih.gov)

Amphibians, therefore, may serve as overlooked vectors/hosts for zoonotic pathogens and the amphibian IFN system provides a model to study IFN evolution in molecular and functional diversity in coping with dramatic environmental changes during terrestrial adaption. (nature.com)

1994. Biology of Amphibians . (wikimedia.org)

Data deficient" amphibians are the most imperiled, according to the study, which found that 85 percent are likely threatened with extinction. (yale.edu)

Now, museum jars stuffed full of amphibians may help scientists decide whether this wave of extinctions was caused by a fungal infection. (grasscity.com)

Caecilians ( New Latin for 'blind ones') ( / s ɪ ˈ s ɪ l i ə n / ) are a group of limbless, vermiform (worm-shaped) or serpentine (snake-shaped) amphibians with small or sometimes nonexistent eyes. (uraniumorien351.click)
They mostly live hidden in soil or in streambeds, and this cryptic lifestyle renders caecilians among the least familiar amphibians. (uraniumorien351.click)
Gymnophionomorpha is a recently coined name for the corresponding total group which includes Gymnophiona as well as a few extinct stem-group caecilians (extinct amphibians whose closest living relatives are caecilians but are not descended from any caecilian). (uraniumorien351.click)
Some studies have instead argued that caecilians descend from extinct lepospondyl or stereospondyl amphibians, contradicting evidence for lissamphibian monophyly (common ancestry). (uraniumorien351.click)
Rare fossils of early gymnophionans such as Eocaecilia and Funcusvermis have helped to test the various conflicting hypotheses for the relationships between caecilians and other living and extinct amphibians. (uraniumorien351.click)

Remember that you can report your sightings of #amphibians , #reptiles & their eggs on our #DragonFinderApp . (ecowatch.com)
Successful reproduction was recorded two years after the first release (158 eggs, producing 80 hatchlings were discovered), though the full extent of nesting was unknown. (conservationevidence.com)

Our findings highlight the need to adequately assess the brain-endocast relationship in a broad range of vertebrates, in order to inform neural reconstructions of fossil taxa using the Extant Phylogenetic Bracket approach and future studies of brain evolution. (frontiersin.org)
How amphibians will respond to ongoing climate change is uncertain and doubtless will vary among taxa and environments. (amphibiaweb.org)
Amphibians are among the most sensitive taxa to climate change, and species inhabiting arid and semiarid landscapes at the extremes of their range are especially vulnerable to periods of drought. (usgs.gov)

These include the Devil's Hole pupfish, at least eight other subspecies of pupfish and speckled dace, endemic spring snails, native amphibians, such as the Amargosa toad (ranked by the Nevada Natural Heritage Program as globally rare), and endemic beetles. (nature.org)

Vulnerable: extent of occurrence is less than 20,000 km 2 . (amphibiaweb.org)
Its Extent of Occurrence is estimated at 323 sq km. (indianamphibians.org)
Its Extent of Occurrence is approximately 7,204 sq km. (indianamphibians.org)

Address correspondence to T.B. Hayes, Laboratory for Integrative Studies in Amphibian Biology, Department of Integrative Biology, University of California, Berkeley, CA 94720-3140 USA. (nih.gov)

This work highlights the vulnerability of this group of amphibians to rapid climate change and demonstrates that global changes have nuanced impacts on species survival. (usgs.gov)
The data presented here demonstrate that the current amphibian loss seems to be driven by anthropogenic influence, with climate a factor of a secondary importance. (palass.org)
Data files contain mercury concentrations in amphibian and dragonfly tissues, mercury concentrations in sediment, as well as amphibian morphometrics, and habitat and climate characteristics where the samples were collected. (usgs.gov)

Amphibian IFNs represent a molecular complex more complicated than those in other vertebrate species, which revises the established model of IFN evolution to facilitate re-inspection of IFN molecular and functional diversity. (nature.com)
Distinguishing features of the recorded species, such as reproductive mode and association to different habitats, together with degree of diversity found among assemblages, highlights the importance of preserving this region for the amphibian conservation. (bvsalud.org)

Bioassessments can be a powerful tool in expanding our knowledge of Bd in Tennessee and can be used to focus biological hazard protocols in respect to the conservation status of amphibians. (utc.edu)

The Mesophytic Semideciduous Forest (MSF) is one of the most critically endangered ecosystems, whose extent was reduced to about 7% of the original cover, scattered in small fragments. (bvsalud.org)

Kilpatrick AM , Briggs CJ , Daszak P . The ecology and impact of chytridiomycosis: an emerging disease of amphibians. (cdc.gov)
To find out, the researchers combined their knowledge of amphibian ecology, newly digitized public health record data, and data analysis methods developed by economists to leverage this natural experiment. (ucdavis.edu)

We study the evolutionary history of amphibians and early reptiles, their ontogeny and phylogeny. (naturkundemuseum-bw.de)
Cnidarians (corals, sea anemones, sea fans, sea pens, jellyfish, and hydroids) are believed by many evolutionary biologists to be the most ancient lineage of extant venomous animals. (grisda.org)

Any UK residents who observe arboreal amphibians can record the findings via the Dragon Finder App , or to contact them directly . (ecowatch.com)

The volunteers went looking for hazel dormice in nest boxes and bats in tree cavities and found 56 amphibians in total, according to the study. (ecowatch.com)

Metamorphosis is a process by which organisms such as insects, fish, and amphibians, undergo physical changes. (cisco.com)

The disappearance of Monteverde's famed golden toad, which vanished within three years, brought widespread attention to the amphibian crisis. (grasscity.com)

The U.S. Geological Survey's Eastern Ecological Science Center is home to the Northeast Amphibian Research and Monitoring Initiative (NEARMI), one of 7 ARMI regions across the United States. (usgs.gov)
Amphibians were swabbed to assess for Bd and other ecological qualities like canopy cover, and air and water temperature are a few of the measurements evaluated. (utc.edu)

Comma-separated values (.csv) file containing data related to amphibian sampling across the United States between 2016 and 2021. (usgs.gov)

Another promising area of research lies in exploring the extent to which precursor cells derived from non-neural tissues, or from different stages of development, can generate specific classes of neurons and glia that can be used to repair particular neural circuits. (nih.gov)

Among our current studies are effects of invasive species, disease, and land use change on the dynamics of amphibian communities to inform conservation and management decision making. (usgs.gov)

The researchers used swabs to gently swipe the amphibian skins and collect the short DNA sequence needed to confirm Bd 's presence. (grasscity.com)

The bushfires in southeastern Australia during the summer of 2019/20 were unprecedented in their extent and intensity. (queensu.ca)

Control and eliminate population levels and extent of exotic and invasive species. (nature.org)

The limbless amphibian Pseudonata squedelium , commonly known as the squeedle, was first described by an expeditionary force several hundred years ago. (freelancetraveller.com)

Typical levels of tree canopy loss increase annual malaria cases by up to 0.12 cases per 1,000 people, compared to 1 in 1,000 for the amphibian die-off. (ucdavis.edu)

It may be that venoms make an excellent model for studying how and to what extent natural processes are capable of altering life since the Fall. (grisda.org)
Emphasizing the remarkable similarity in codewords used by bacteria, amphibian, and mammalian processes and the fact that most, if not all, forms of life on the planet use almost the same genetic language, Nirenberg suggests that developments in genetic research also point to a physio-chemical or molecular basis for processes 'governing such fundamentally biological phenomena as cell metabolism and replication. (nih.gov)

Scientists wondered, could the crash in amphibians have influenced the rise in malaria cases? (ucdavis.edu)
For many, if not most, creationist scientists, a major question relating to origins is not whether organisms evolve, i.e. change through time, but to what extent and how quickly these changes occur. (grisda.org)

Donations to Mass Audubon are tax-deductible to the full extent provided by law. (massaudubon.org)

Reptile, Amphibian and Fish Conservation Netherlands (RAVON). (gbif.org)

Neither the lissamphibians nor any of the extinct groups of amphibians were the ancestors of the group of tetrapods that gave rise to reptiles . (britannica.com)

For the first time, we show that the emergence and expansion of intronless IFN genes is evident in amphibians, shown by 24-37 intronless IFN genes in each frog species. (nature.com)

Dr. Sattler's current research involves the determination of the distribution of amphibians in Virginia, particularly those species for which morphology is inadequate to identify the species, necessitating the use of molecular markers. (liberty.edu)
This work benefitted from data gathered by the North American Amphibian Monitoring Program (NAAMP) and the U.S. Geological Survey Amphibian Research and Monitoring Initiative (ARMI). (usgs.gov)
In response to growing public concerns about this loss of biodiversity, the U.S. Congress funded the Amphibian Research and Monitoring Initiative (ARMI), a national program coordinated by the U.S. Geological Survey. (usgs.gov)
The study, published in the journal Environmental Research Letters , links an amphibian die-off in Costa Rica and Panama with a spike in malaria cases in the region. (ucdavis.edu)
The research , conducted by the University of Cambridge and the charity Froglife, with support from PTES, was published in the journal PLOS ONE on Wednesday and represents the first time that amphibians ' tree-climbing capabilities have been assessed on a national scale. (ecowatch.com)

Data collected is sent to the @NBNAtlas & can help us get a wider picture of amphibians & reptiles in the UK. (ecowatch.com)

At the spike's peak, up to 1 person per 1,000 annually contracted malaria that normally would not have had the amphibian die-off not occurred, the study found. (ucdavis.edu)
The study team also brought living amphibians into the lab and infected them with Bd to get a better handle on how the fungus might have felled so many of their comrades. (grasscity.com)
This study aims to describe the anurofauna of a site in MSF landscape in Paranapanema River Basin, considered a geographical gap in knowledge of amphibians. (bvsalud.org)

The amphibian tree of life. (wikimedia.org)
On some instinctual level, they know the vernal pools will not last forever and will dry up by late summer-a big problem for amphibians, whose early life cycles require water. (massaudubon.org)
But the short life of the vernal pool is a blessing for the young amphibians since they have fewer predators to worry about in the water. (massaudubon.org)

Anatomy9

Organisms30

Diseases4

Chemicals and Drugs6

Phenomena and Processes15

Anthropology, Education, Sociology and Social Phenomena1

Technology, Industry, Agriculture2

Information Science4

Health Care6

Geographicals1

Frogs10

Populations9

Toads8

Class Amphibia2

Declines5

Anura2

Species of living amp1

Decline7

Pathogen3

Chytrid fungus1

Mammals6

Batrachochytrium1

Fishes3

Aquatic5

Reptiles of Madagascar2

Reptilian1

Terrestrial1

19941

Extinction1

Extinctions1

Caecilians5

Eggs2

Taxa3

Snails1

Occurrence3

Biology1

Climate3

Diversity2

Conservation status1

Ecosystems1

Ecology2

Evolutionary2

Dragon Finder App1

Bats1

Insects1

Widespread1

Ecological2

20161

Tissues1

Disease1

Researchers1

20191

Invasive species1

Limbless1

Typical1

Processes2

Scientists2

Full extent1

Fish1

Group1

Frog1

Research5

Data1

Study3

Life3