Articles tagged with Frogs
Researchers from the Pontificia Universidad Católica del Ecuador discovered a new species of frog, Pristimantis milpe, by reviewing historical specimens preserved at the Natural History Museum in London. The species is widely distributed and easy to detect, inhabiting the Chocó forests of western Ecuador and southern Colombia.
A study published in iScience found that female Cope's gray treefrogs prefer males with longer calls, but can become overwhelmed by too many options, selecting only 25% of target calls. This phenomenon, known as choice overload, may impact the evolution of species.
A study from the Smithsonian suggests that female Cope's gray treefrogs are susceptible to choice overload when confronted with multiple mating calls, leading to reduced ability to select a suitable mate. The research found that cognitive limits play a significant role in sexual selection among animals, highlighting the importance of u...
Researchers identified Adenomera varcena through call and DNA analyses, revealing a hidden diversity in the Amazon's floodplain forests. The discovery highlights cryptic diversity and underscores the need for further research to understand amphibian diversification in the Amazon.
An international team of scientists describes seven new species of Madagascar's elusive diamond frogs, revealing a more diverse group than previously thought. The research provides an important foundation for future conservation efforts in Madagascar's rapidly disappearing forests.
A new study published in Nature Communications finds that a protein called saxiphilin can neutralize the potent neurotoxin saxitoxin, preventing and even reversing paralytic shellfish poisoning. The discovery could have important public health implications as saxitoxin accumulates in shellfish and causes poisoning when consumed.
A study reveals that forests and rivers work together to strengthen amphibian microbiomes and protect them from a deadly fungus. The research found that disconnected habitats impair the ability to recruit defensive microbes.
A study found that some toad populations recover from a deadly fungus due to the early maturation of antimicrobial peptides in their tadpole stage. This immunity allows them to survive as adults, suggesting that environmental factors such as temperature may play a role in disease progression.
Researchers found that wood frogs' adaptation to salty water increases their vulnerability to ranavirus, a common and fatal disease. The study highlights the hidden costs of survival in wildlife under environmental stress.
A study by researchers from the University of Ottawa found that Calling and Non-calling western toads are genetically distinct, behaviourally different, and have ecological variations. This discovery has important implications for conservation and wildlife management in Canada.
Australian researchers found short bursts of intense UVB radiation caused 50% more DNA damage in tadpoles than a lower level for a longer period. This type of damage could impact frog growth and survival.
A study by the University of Florida reveals that young frogs invest heavily in early growth and delay stronger immune responses until infection levels become dangerous. This strategy helps them survive and reproduce in environments with fluctuating food availability and infection risk.
Researchers suggest that the evolution of toxin accumulation in poison dart frogs occurred gradually, with at least four phenotypes representing stages in this process. These phenotypes include species that sequester alkaloids or modify them, while others metabolize toxins without accumulating them.
Researchers found that connected habitats enhance the ability of amphibian skin microbiome to defend against diseases by increasing beneficial bacteria presence. This study highlights a critical link between environmental disturbance, microbial defenses, and disease dynamics.
Researchers found that connected natural habitats help maintain beneficial skin microbes that inhibit deadly fungal pathogens in tropical amphibians. Habitat fragmentation weakens these microbial defenses, leading to increased pathogen infection levels.
Researchers have discovered a new species of glassfrog in Ecuador named after Neisi Dajomes, the first Ecuadorian woman to win an Olympic gold medal. The Dajomes glassfrog has uniformly green skin with a pebbly texture and a white membrane covered in light-reflecting cells on its underside.
Scientists have found that African frogs' diversity is linked to historical climate conditions, indicating they adapted to changing environments. The study suggests that even after 12,000 years, tropical frogs still remember the impact of past ice ages on their habitats.
Parasites alter male calls, creating a complex pattern that can change how females evaluate potential partners. Females prefer lower-frequency calls, but also weigh the risk of parasite infection, making mate choice a nuanced decision.
Researchers found that Gracixalus weii treefrog's call is similar to a bird-like chirp of the Black-Breasted Thrush, highlighting the evolution of acoustic symbols in amphibians influenced by ecological interactions with birds. This phenomenon provides a reliable alternative to morphological or molecular diagnosis for cryptic species
A recent study led by researchers at State University of Campinas confirms that the Bd-Brazil fungal strain originated in Brazil and spread globally through international trade. The strain has already contributed to the decline of over 500 species of anuran amphibians, including toads and frogs.
A study by Kobe University ecologist Shinji Sugiura reveals that adult pond frogs actively attack and consume hornet workers despite being stung repeatedly. The frogs showed no noticeable harm from the venomous stings, making them a unique model organism for studying mechanisms underlying venom tolerance.
A new species of rocket frog, Dryadobates erythropus, has been discovered based on a single dried specimen kept at the Smithsonian Institution's National Museum of Natural History for 62 years. The species is considered 'probably extinct' due to lack of further sightings or specimens in the wild.
A University of Houston biologist has received a $2.16 million federal grant to study how some coastal frogs survive in salty environments. The research could reveal how cells cope with salt stress and have implications for understanding the health risks of high-salt diets in humans.
Researchers have identified three new species of tree-dwelling toads from Africa that skip the tadpole phase and give birth to live toadlets. This rare reproductive strategy is found in less than 1% of frog species, making these toads exceptionally interesting.
A new study by Cornell University researchers found that tadpoles that lose their lungs through evolution never regain them, even when environmental change would favor it. This challenges the assumption that lost traits can easily reemerge.
Scientists have discovered that gray tree frogs prepare for winter by responding to shorter days rather than colder temperatures, allocating energy resources unnecessarily. This 'ecological trap' could affect critical behaviors like breeding cycles and migration patterns in species adapted to seasonal cues.
A new study reveals that female treefrogs prefer mates with impressive calls in open environments, but their choices become inconsistent when faced with multiple options. The findings suggest that crowded choruses may hamper the evolution of calls and impact mate selection.
A new database compiled by researchers at the University of Queensland provides a detailed picture of the frog and freshwater fish species on hundreds of Australian islands. The study found that 536 islands have freshwater habitats, with 102 amphibian species and 95 freshwater fish species recorded.
Researchers have discovered that combining antimicrobial peptides from bees and frogs can prevent bacteria from mutating quickly, making them a promising alternative to traditional antibiotics. This finding could lead to safer disease control in livestock and agricultural settings.
Researchers have identified a new genus of frog, Dryadobates, comprising at least 12 species, with three already declared extinct. The study utilized historical DNA analysis to clarify the taxonomic classification of previously single-species frogs, revealing hidden diversity and extinctions in the Atlantic Forest.
In a groundbreaking discovery, researchers have identified three new species of frogs in the Cordillera de Huancabamba highlands. The study reveals that these secretive creatures possess unique characteristics, such as prominent tubercles on their bodies and adaptations to the harsh environment.
A new study from Goethe University confirms that climate change and extreme weather events are devastating amphibian diversity. Analysis of global weather data reveals a direct connection between increased heat waves, droughts, and declining salamander populations.
A new species of ancient tree frog, Litoria tylerantiqua, has been discovered in Australia, challenging previous estimates of when Australian and South American tree frogs separated. The fossil record indicates that the separation occurred approximately 22 million years ago, rather than 33 million years ago as previously thought.
A new blue Ranitomeya species has been discovered in the Amazon's Juruá River basin, featuring copper-colored legs. This finding represents one of only two novel Ranitomeya species identified in a decade.
A study predicts that over 80% of amphibian species in the Upper Paraguay River Basin will lose suitable habitats by 2100. The region, which includes the Pantanal and its surroundings, is expected to experience local extinctions under both optimistic and pessimistic greenhouse gas emissions scenarios.
A team of researchers from the University of Kansas has confirmed that the Leyte Chorus Frog is a hybrid of two species with overlapping ranges whose intermingling was driven by deforestation. The discovery sheds new light on the impact of human activities on the environment and highlights the importance of conservation efforts.
Larvae of wood frogs grow and mature precociously when infected with ranavirus, exhibiting accelerated growth and development. This may help tadpoles tolerate the energetic demands of infection or escape risky environments to avoid infection entirely.
Researchers at the University of Pennsylvania School of Engineering and Applied Science have discovered a new class of antibiotics derived from frog secretions, which show promise in targeting harmful bacteria without affecting human cells or beneficial gut bacteria. The synthetic peptides were developed using structure-guided design a...
The Bezos Earth Fund has launched a five-year project to conserve amphibian species in Latin America, partnering with the Smithsonian Tropical Research Institute and Amphibian Survival Alliance. The initiative aims to halt amphibian extinctions and boost captive populations by 15%.
A team of researchers has rediscovered the elusive Alsodes vittatus frog species in Chile, providing critical ecological data and highlighting conservation concerns. The rediscovery is a significant milestone for South American herpetology, emphasizing the need to study and protect this rare species.
A new study estimates it would cost $15.6 billion per year for 30 years to prevent extinction for 99 of Australia's priority species, due to habitat destruction, invasive species, and climate change. The Australian Government has committed to reversing the decline of 110 priority species, but experts warn that urgent action is needed t...
A comprehensive survey predicts that 36% of anurans' habitats worldwide will be threatened by rising temperatures and water scarcity. The Amazon and Atlantic Rainforest, home to the most diverse anuran species, will face devastating effects from drought events.
Cricket frogs use a combination of underwater push and leg movement to propel themselves out of the water, resulting in a 'belly flop' motion. This discovery could lead to advancements in bio-inspired robotics and water testing systems.
A genomic analysis reveals eight different sex chromosomes in 11 species of the frog, indicating unique and newly evolved genes for male or female sexual differentiation. This unexpected variation allows researchers to explore rapid evolution in sex determination, with possible 'on-off switch' genes orchestrating sexual differentiation.
Researchers at ISTA and Columbia University developed a technique using adeno-associated viruses (AAVs) to track a frog's nervous system throughout its metamorphosis, shedding light on the neural circuit and behavior changes during this transition. The breakthrough can help usher amphibian neurobiology into a new era.
A Kennesaw State University researcher has received a National Science Foundation grant to study the evolution of salamanders' behavioral habits in urban streams. The study aims to broaden research participation at minority-serving universities and will provide undergraduate students with hands-on experience conducting field research.
Brachycephalus dacnis is the seventh species of flea toad identified in the genus Brachycephalus. The study published by a group at the State University of Campinas provides detailed information about its anatomy, skeleton, and internal organs.
A team of researchers from UConn and Washington State University explored how environmental DNA (eDNA) can help better understand population size and health in wood frogs. They found that environmental factors impact eDNA concentrations, but the precision of this method remains unclear due to sample-to-sample variation.
An international team of researchers has discovered seven new species of tree frogs in Madagascar, characterized by their high-pitched whistling calls. The unique vocalizations are believed to serve as self-promotional advertisement calls to convey information about the male frog's suitability as a mate.
A new study applies modern portfolio theory to conserve the coquí llanero frog by diversifying investments and managing risk under future climate uncertainty. The analysis suggests that relying on existing protected areas may not be enough to mitigate climate risks, and investing in additional habitats could be worth the cost.
Researchers at Nagoya University found that Eiffinger's tree frog tadpoles store ammonia in their bodies, excreting less waste into the environment. This adaptation allows them to thrive in small water bodies with limited space and few predators.
Researchers from the University of Kansas have identified a new species of fanged frog, Limnonectes cassiopeia, found in the Philippine island of Luzon. The species was overlooked due to its similarity to the well-known Luzon Giant Fanged Frog. Key differences include smaller toe discs and unpigmented toe pads.
A recent study reveals tarantulas have mutually beneficial relationships with various species, including amphibians and army ants. The spiders' dense hair may serve as a defense mechanism against these predators. Tarantulas also employ unique escape strategies and potentially utilize chemical defenses to deter attacks.
Researchers found that green and golden bell frogs can clear the infection when exposed to warmer temperatures in artificial 'frog saunas.' The study suggests that warm-preferring species may have an advantage over cold-preferring species, offering a potential solution for conservation efforts.
A team of biologists has discovered a unique breeding behavior in the Andamanese Charles Darwin's frog, laying terrestrial eggs inside tree holes in an upside-down position. The frog also produces complex advertisement calls and engages in aggressive fights for mating rights.
A new study uses machine learning to analyze the genetic diversity of two amphibian species, finding that different processes shaped their evolution. The research suggests that population demographic events and contemporary landscape factors played a significant role in shaping the genetic variation of these species.
Researchers have created a detailed 3D atlas of the African clawed frog's development, revealing key changes during metamorphosis. The atlas uses X-ray microtomography to show the transformation from tadpole to mature adult frog.
A study published in Nature has found that artificial heat shelters can significantly reduce chytrid infections in frogs, allowing them to co-exist with the deadly disease. The simple intervention uses readily available materials and can be easily scaled up for community involvement.
A recent study has found that frogs retain a surprising number of light-sensing proteins, contradicting the hypothesis that they lost these genes through evolution. The researchers discovered that most modern frog species have all 18 ancestral nonvisual opsins and four of five ancestral visual opsins.
Researchers have discovered that frogs possess an unexpected range of nonvisual opsins, which play a crucial role in regulating their day-night cycles. This finding provides new insights into the evolution and adaptation of sensory systems in different animals.