Articles tagged with Frogs
Researchers found a new species of fanged frog on Sulawesi Island, with males guarding eggs on leaves to keep them moist. The tiny frogs weigh about the same as a dime and have barely visible fangs, challenging previous assumptions about their reproductive behavior.
Scientists have discovered the protein that enables poison dart frogs to accumulate and store potent toxins in their skin for self-defence against predators. The findings may suggest potential therapeutic strategies for treating humans poisoned with similar molecules.
Research by the University of Bern reveals that poison dart frog personality traits impact mating success, clutch numbers, and offspring survival. These traits are present in tadpoles and remain stable after metamorphosis.
Frogs from the genus Eleutherodactylus are geologically the oldest Caribbean vertebrates to be found in Florida. They arrived in North America much earlier than previously thought, with evidence suggesting they reached the peninsula through overwater dispersal on flotsam or other buoyant debris.
A new study found that a deadly frog disease, Perkinsea, is more widespread in Central Florida than expected, infecting over a third of sampled frogs. The disease is linked to cooler temperatures and higher precipitation, posing a concern for threatened species like the gopher frog.
Researchers have found that caecilians, an elusive type of amphibian, transfer microbes from their skin and gut to their young during skin-feeding. This unique method of parental care provides nutrients and helps establish a healthy microbiome in juvenile caecilians.
A new study found that a vaccine against the deadly chytrid fungus in frogs can shift the composition of the microbiome, making frogs more resilient to future exposure. The researchers applied a non-lethal dosage of a metabolic product created by the chytrid fungus to tadpoles and observed a protective shift in the microbiome.
A study by Shinji Sugiura and Masakazu Hayashi found that bombardier beetles are better defended against pond frogs than assassin bugs. The researchers also showed that both insects benefit from mimetic interactions with the shared predator.
Scientists developed a new diagnostic test for chytridiomycosis, identifying previously undetected strains and detecting pathogens in amphibians worldwide. The test's success verified its affordability as an alternative for widespread surveillance, addressing the urgent need for rapid detection of the disease.
A study found that the coqui frog's calls have changed over a 23-year period due to rising temperatures, with higher-pitched calls at higher elevations. This shift may indicate a mini-migration of frogs up the mountain as temperatures increase, posing a threat to their survival.
Chelsea Kross, a University of Arkansas alumna in biological sciences, earned the BioOne Ambassador award for her creative approach to science communication. Her research highlights the decline of the crawfish frog due to habitat destruction and provides insights into conservation efforts.
Two new species of poisonous birds have been discovered in New Guinea's rainforest, containing a neurotoxin similar to that found in South American poison dart frogs. Genetic changes in these bird species allow them to tolerate and store the toxin in their feathers, potentially serving as a defensive mechanism.
A recent study found that the highly contagious chytridiomycosis fungus has become more prevalent and widespread in Africa since 2000, posing a new threat to amphibian populations. The disease, which can cause skin sloughing, lethargy, weight loss, and cardiac arrest, may be linked to climate change-induced stress.
Virginia Tech researchers Traci DuBose and Meryl Mims studied 90 species of frogs and toads using publicly available data from the Global Biodiversity Information Facility. They found that approximately 11% of anuran species are sensitive to climate change but not currently listed as at-risk.
A new species of stream frog from the Andes of Ecuador was named Hyloscirtus tolkien, created by one of their favorite writer, JRR Tolkien. The researchers found it in the pristine streams of the Río Negro-Sopladora National Park.
A new study reveals the EU's massive demand for frog legs has led to a global trade chain threatening frog populations, with Southeast Asian and Eastern European species facing extinction. The authors call for greater transparency and monitoring of pesticide residues in traded frogs' legs to ensure sustainability.
Researchers found a unique, silent frog species in Tanzania's Ukaguru Mountains, highlighting the importance of conservation and understanding diverse ecosystems. The discovery provides critical information for protecting this critically endangered species and its habitat.
Australian scientists developed virtual models to reveal a crucial link between natural flooding and the extinction risk of endangered southern bell frogs. The study found that modern river regulation dramatically increases extinction risk in smaller wetlands.
Glassfrogs have a unique adaptation to stay transparent, storing nearly all of their red blood cells in their livers with reflective guanine crystals. This allows them to avoid blood clots and live without the risks associated with aggregation of red blood cells.
Researchers at Duke University discovered that glassfrogs store nearly 90% of their circulating red blood cells in their liver when they want to be transparent. This helps them blend in with their surroundings and avoid predation during the day.
Researchers found that male wasp genitalia serve as an effective anti-predator defense, deterring some tree frogs from eating them. Male genital spines are used to pierce and sting predators, preventing them from swallowing the wasps. This study highlights the significance of male genitalia in animal defense.
A large international team has discovered and described 20 new frog species from Madagascar, marking a major milestone in the country's biodiversity efforts. The discovery was made possible by integrating phylogenomics, archival DNA analysis, morphology, and bioacoustics to identify previously unknown species.
A large-scale analysis of over 2,700 species of anurans reveals that the vertebral stripe evolves repeatedly and is adaptive to the animal's habitat. The study identifies a key gene linked to the stripe pattern, which may allow species to adapt to environmental changes.
A new study reveals how cane toads (Rhinella marina) consume prey by using a complex pulley system of cartilage and muscle. The mechanism involves the hyoid plate, which is attached to muscles and loops like a marionette, pulling food backward into the throat.
Researchers found that 90% of surveyed individuals did not recognize six out of seven endangered species. Increasing public knowledge and recognition can boost conservation support for these vulnerable animals. The study highlights the need for targeted marketing initiatives to change people's perception of lesser-known species.
A study published by the University of Zurich has found that vocal communication in vertebrates has a common and ancient evolutionary origin, dating back to around 407 million years ago. The research used vocal recordings and contextual behavioral information from 53 species across four major clades of land vertebrates.
Research at the University of Arizona found a strong link between bright color use and ancestral day-night activity patterns. Species that use bright colors for sexual signals were descended from diurnal ancestors, while those using aposematism had nocturnal ancestors. This pattern holds across land vertebrates with over 40,000 species.
A study from the University of California, Davis found a clear connection between an amphibian die-off and a spike in malaria cases in Costa Rica and Panama. The research suggests that stable ecosystems are crucial for disease prevention and health, and massive ecosystem disruptions can have significant consequences for human well-being.
A new study reveals that red-eyed treefrogs use bimodal acoustic calls, combining sound with plant-generated vibrations to convey messages. Female frogs prefer calls with both sound and vibration, while male frogs become more aggressive when feeling the vibrations of rival calls.
Researchers found two distinct populations of the invasive American bullfrog in Brazil, one descended from 1935 introductions and another from the 1970s. The study highlights the need for law enforcement to prevent escape from frog farms.
Researchers at the Florida Museum of Natural History found that frog forelimbs are not just for jumping, but also for fighting and grasping mates during reproduction. The fused radius and ulna bones provide strength and weight reduction, while also increasing stress on the tendon connecting to the bone.
A new study from the University of South Australia shows that captive frogs can be protected from the deadly fungus Batrachochytrium dendrobatidis (Bd) through natural skin shedding processes. However, captivity also reduces skin bacteria diversity and richness, potentially affecting the frogs' resilience to pathogens.
Research reveals that heat-escape behaviors vary among frog species due to functional changes in thermal sensors. The study suggests that perception of noxious heat plays a crucial role in the evolutionary adaptation, while heat tolerance is relatively less important.
Researchers found that frogs with few predators rely on escape strategies with large brains and conspicuous coloration, while those with many predators use camouflage with smaller brains. This study establishes a link between brain evolution and predator evasion strategies.
A team of researchers, led by UTA biologist Eric Smith, has identified six new species of miniature frogs in Mexico. These tiny amphibians have evolved to retain juvenile characteristics, limiting their adult growth and size.
A new study reveals that 41% of Vietnam's amphibian species are threatened with extinction, with many having limited distribution ranges and no conservation data available. The researchers highlight the importance of implementing targeted conservation efforts, including ex-situ programs and protected areas, to address these gaps.
Researchers found that the eyes of tadpoles undergo significant changes in gene expression and photoreceptor cell sensitivity to adapt to life on land. The study reveals that 42% of genes involved in vision changed between tadpole and juvenile frog stages, enabling better adaptation to a bluer light environment.
Researchers studied miniature frogs from the genus Brachycephalus and found that their small vestibular system prevents them from maintaining balance. The tiny frogs can jump but struggle to control their trajectory mid-leap.
Researchers from CIIDIR-Oaxaca Amphibian Ecology Laboratory studied the consumption of tadpoles in stone soup, revealing its significance as an indicator of water health and the species' vulnerability to overfishing. The study highlights the importance of accurately documenting human interaction with amphibians.
A Dartmouth study using advanced recording technology reveals that females prefer lower frequency songs with low variance, while males time their songs to follow neighbors. The research shows how chorus composition and individual songs impact mating in wood frogs.
Scientists have discovered six new species of frog in Mexico's forests, with one being the country's smallest, the 13mm-long Craugastor candelariensis. The newly discovered species are known as 'direct-developing' frogs, emerging from eggs as perfect miniature frogs.
Researchers at Gauhati University studied roadkill on a 64-kilometer stretch of National Highway 715 in India's Kaziranga-Karbi Anglong Landscape. They found dramatic mortality rates among frogs, toads, snakes, and lizards, with over 6000 animals killed annually.
In a study on cannibalism in poison frog tadpoles, researchers found that relatedness affects aggression levels. Large tadpoles were less aggressive towards their smaller siblings than non-siblings, suggesting they can discriminate between relatives and change behavior accordingly.
A new study employs computer algorithms to design multimaterial structures mimicking natural designs for efficient actuators and energy absorbers. The approach enables the creation of sustainable devices with reusable and fully recoverable energy dissipators.
Researchers discover new species of burrowing frog, Synapturanus danta, in Amazon peatlands. The frogs' unique calls and adaptations make them an important part of their underground ecosystem, contributing to nutrient cycling and soil structure.
Research by UC Berkeley biologists highlights the importance of conserving harlequin toad diversity due to the loss of potential pharmaceuticals. A review of 113 species found that only 16 have been studied for toxins, and many are in decline or extinct.
Researchers at Tufts University successfully regrow a functional, nearly complete limb on adult frogs using a five-drug cocktail and silicone wearable bioreactor dome. The treatment sets in motion an 18-month period of growth restoring a fully functional leg.
A new species of rainfrog, Pristimantis gretathunbergae, has been discovered in Panama and named after global environmental activist Greta Thunberg. The frog's habitat is threatened by climate change and deforestation, highlighting the importance of conservation efforts.
Researchers at the University of Vermont have created the first living robots capable of reproducing, using AI-designed Xenobots. This groundbreaking achievement has significant implications for regenerative medicine, as it demonstrates a new form of biological self-replication.
Researchers confirmed the presence of dentin and enamel in the teeth of Gastrotheca guentheri, a species long believed to have lost this trait. The discovery challenges Dollo's Law, which states that lost traits are never re-evolved.
A Brazilian study expands amphibians' known reproductive modes to 74, creating a new classification. The research analyzed 2,171 species of amphibians, including anurans with 71 reproductive modes, some laying eggs in aquatic environments while others develop directly.
A study in the Atlantic Rainforest detected high mortality rates among tiny frogs known as pumpkin toadlets infected with the chytrid fungus. The infection causes a physiological imbalance leading to death from a heart attack. Climate change and drought may exacerbate the threat to terrestrial amphibians.
A new species of frog, Bishop's frog Leiopelma bishopi, has been discovered from fossils in North Canterbury and named in honor of late Professor Phil Bishop. The finding provides significant insights into the evolution of New Zealand's frogs and highlights the impact of climate change on isolated island ecosystems.
German scientists developed a method to supply oxygen to tadpole brains using photosynthesizing algae injected into their bloodstream. This approach effectively revived neurons in oxygen-deprived tadpoles, showing promise for new therapies for conditions such as stroke and high-altitude environments.
A new study led by a University of Maine graduate student found that 50% fewer frogs died from vehicle collisions in spring 2020 compared to previous years. This decline was part of a broader reduction in animal road fatalities during the pandemic, similar to findings in other studies worldwide.
Researchers at Binghamton University found that wood frog eggs laid later in the breeding season are less resilient to road salt pollution. The study highlights the complex effects of climate change on amphibian breeding, which may lead to population declines in vulnerable species.
Researchers have discovered that toxic animals produce 'toxin sponges' to mop up deadly toxins and prevent them from binding to vital proteins. This alternative autoresistance strategy may offer a general means of toxin protection, including the development of antidotes against various toxic agents.
Researchers studied six species of amphibian at Slimbridge Wetland Centre during COVID-19 lockdowns and partial reopenings. Amphibian activity varied depending on the number of visitors, with some species more visible when there were fewer people around.
Researchers used a new survey method to detect Eastern spadefoots in Rhode Island, finding 42 individuals over 10 nights, contradicting previous assumptions of their rarity. The study also revealed sub-adult frogs were common, and the species' social structure is more complex than previously thought.
Researchers analyzed CT scans of nearly every living amphibian genus to reveal that frogs have lost teeth over 20 times during their evolution. The study found a correlation between the absence of teeth in frogs and a specialized diet on small insects.