Articles tagged with Salamanders
A new genus of giant salamander, Limnospondylus ajimuensis, has been identified from fossilized vertebrae found in the Ajimu region of Japan. The discovery sheds light on Japan's evolutionary history and highlights the importance of preserving extant species for the future.
New study redefines the existence of necks in fish and amphibians, identifying functionally distinct anatomical regions. The project aims to build new definitions that apply more widely across all major vertebrate groups.
The Japanese giant salamander's diet shifts from aquatic insects to large prey like fish and crabs as it grows, allowing it to reach the top of its ecosystem. This transition is accompanied by an increase in trophic position, enabling the species to become a superpredator.
Scientists suggest that managing pond conditions can tip the balance in favor of native species. Research found that longer hydroperiods, typically over 110 days, lead to larger and more stable populations.
Researchers at Harvard University have discovered that salamanders rely on the sympathetic nervous system to activate stem cells throughout the body, enabling them to regrow entire limbs. This finding may provide insights into developing regenerative treatments for humans, particularly in limb regeneration and organ repair.
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.
Researchers at Washington State University discovered that wandering salamanders use a unique mechanism to control blood flow in their toe tips, enabling them to optimize attachment and detachment on irregular surfaces. This discovery has implications for bioinspired designed, including the development of adhesives and prosthetics.
Researchers found that monkeys swiftly identify snakes because of snake scales as a visual cue, revealing an evolutionary adaptation for threat detection. This insight into primate vision and brain evolution can improve our understanding of animal cognition.
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.
A recent study reveals that red-backed salamanders are more abundant than expected in eastern North American forests, with an estimated 5,300 individuals per football field-sized patch. The discovery highlights the ecological importance of these small but mighty creatures in maintaining forest health.
A recent USGS study found that red-backed salamanders have higher densities and biomass than expected, playing a key role in terrestrial temperate ecosystems. The discovery suggests that salamanders are more prevalent than previously suspected, and their disappearance could have significant ecosystem-level consequences.
The North American Bsal Task Force has helped keep the novel pathogen at bay by developing diagnostic techniques, a rapid response template, and a surveillance program. Thirty-five of 80 North American amphibians can be infected with Bsal, causing lethal skin disease in susceptible species.
Researchers have uncovered a 270-million-year-old ancient amphibian ancestor in the Smithsonian's collection, naming it Kermitops gratus in honor of Kermit the Frog. The fossilized skull possesses unique features that shed light on the origin of living frogs and other amphibians.
Researchers have developed a noninvasive method to quickly detect the deadly fungus Batrachochytrium salamandrivorans in shipments and captive settings. The new approach tests environmental DNA for Bsal DNA to assess the pathogen's prevalence, providing a way to make an essentially invisible pathogen visible.
Scientists identified habitats and simulated solutions like conservation buffers and open-bottom culverts to allow safe passage for salamanders and other wildlife. The model boosts ecological connectivity while reducing costs compared to large-scale barrier removal.
The Ngoc Linh Crocodile Newt is a newly discovered species of crocodile newt found in the Central Highlands of Vietnam. The species is considered Endangered due to its small population size and limited geographic range.
A Virginia Tech study found that hellbender fathers are more likely to eat their eggs in deforested areas, leading to a drastic increase in filial cannibalism. The research suggests that protecting and re-establishing forest cover around streams is crucial for the species' survival.
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.
Researchers at University of Illinois have recalibrated climate change effects on salamanders, showing a somewhat more hopeful future. The study found that incorporating microclimate data at fine spatial scales reduced predicted habitat loss by 55-80% compared to using free-air temperature data.
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.
A fungus infecting salamanders has evolved to contain multiple copies of jumping genes, which contribute to its increased virulence. The 'copy and paste' mechanism allows the fungus to amplify skin-destruction genes, making it more deadly.
Researchers at the University of Tsukuba found that the Newtic1 protein plays a crucial role in limb regeneration by secreting TGFβ1 growth factors. This discovery sheds light on the regenerative abilities of adult newts and their potential as a model for regenerative medicine.
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.
Invasive house mice on Southeast Farallon Island consume and compete with native species for food, leading to significant impacts on the island ecosystem. The study found that mice are highly opportunistic eaters whose diets vary throughout the year in response to changes in food availability.
A new study reveals that four living amphibian clades, including the dominant Plethodontidae family of lungless salamanders, develop lungs as embryos but lose them as adults. This finding sheds light on the evolution of lung loss over millions of years and suggests that losing lungs may have enabled their remarkable evolutionary success.
Researchers from the University of Tsukuba discovered that changes in the extracellular environment during metamorphosis and body growth enable newt muscle fibers to dedifferentiate and contribute to limb regeneration. This process is crucial for newts' ability to regenerate limbs throughout their life cycle.
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.
Several salamander species in eastern US and Canada face drastic habitat loss due to climate change, threatening ecosystem stability. Proportions of suitable habitats predicted to decline significantly, with some species facing up to 96% reduction.
Researchers discovered that wandering salamanders, living in redwoods, have developed aerial behaviors to avoid predators, including parachuting and gliding. They are able to maintain control and make horizontal maneuvers, defying expectations of their sluggish nature.
Researchers discovered that salamanders rely on aerial postures similar to skydivers to slow and direct their descent. These 'parachuting' animals use fine-scale control to maintain upright body postures and execute banking turns.
A new species of dusky salamander has been discovered in the Gulf Coastal Plain of Mississippi and Alabama, increasing knowledge of the region's biodiversity. The species, Desmognathus pascagoula, is similar to another recently discovered species but has distinct morphological, genetic, and geographic characteristics.
Researchers used X-ray computed microtomography to produce stunning 3D reconstructions of the proteus' head, revealing extensive changes in sensory organs and physical appearance. The study provides detailed information about evolutionary-designed adaptations for surviving in lightless caves.
A new study found that red-backed salamanders have limited ability to adjust to warming climates, with depressed metabolic rates in warmer conditions. This may lead to energy deficits and negatively impact individual growth and reproductive success.
Researchers are using a salamander virus to predict the future of biodiversity amid a changing climate. The study aims to create better models to understand how climate change and infectious diseases interact, with potential implications for conserving species at risk of extinction.
A recent study by James Godwin, Ph.D. has identified the liver as a primary reservoir for pro-regenerative macrophages essential to limb regeneration in axolotls. The research paves the way for regenerative medicine therapies in humans, potentially treating diseases like heart and lung disease with scar-free healing.
Researchers at Bigelow Laboratory are exploring a unique relationship between salamanders and algae to develop innovative drugs regulating human immune systems. The team aims to find molecules that regulate immunity without harming the host, potentially treating autoimmune diseases.
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 Tohoku University and Swiss Federal Institute of Technology have decoded salamanders' body-limb coordination mechanisms. Their findings provide insights into adaptive locomotion and could aid the development of agile robots.
A new study found that spotted salamanders' egg mass coloration is influenced by two opposing evolutionary forces: genetic drift and balancing selection. In small populations, genetic drift drives changes in morph frequencies, while balancing selection helps preserve multiple traits.
The newly discovered Carolina Sandhills Salamander boasts distinct genetic and physical traits, setting it apart from other two-lined salamander species. Its restricted range in the Sandhills region of North Carolina underscores the importance of preserving this unique ecosystem.
Research found that beaver-dammed sites had 2.7 times more amphibian species than undammed sites, supporting species that develop slowly like red-legged frogs and northwestern salamanders.
Researchers re-examined ancient fossils found in Myanmar's amber deposits, revealing that a species initially thought to be an ancient form of chameleon was actually part of the albanerpetontid lineage. The new findings indicate that these ancient amphibians were climbers with specialized tongues for catching food.
Researchers discover that West African lungfish can regenerate lost tails using similar molecular mechanisms as amphibians, suggesting a common ancestor possessed this trait. The study provides new insights into the evolutionary origin of tail regeneration and offers potential opportunities for regenerative medicine.
Researchers discovered that salamander eggs and algae compete to assimilate carbon from their surroundings, challenging previous assumptions about the benefits of symbiotic relationships. This finding has implications for understanding dark ocean carbon fixation and its impact on global food webs.
A team of international researchers found that evolution tends to dampen or smooth out variations in ecological patterns across landscapes. The study, published in the Proceedings of the National Academy of Sciences, analyzed over 500 studies and identified 14 mechanisms affecting the direction of evolution's impact.
A new method using environmental DNA (eDNA) detection can efficiently monitor captive animals for pathogens, reducing the need for huge sample sizes and costly processes. eDNA sampling from tank water is more efficient than testing individual samples, according to Washington State University researcher Jesse Brunner.
A seven-year field experiment found no discernible difference in Oregon slender salamanders on recently harvested tree stands compared to older stands. The study highlights the importance of downed wood in detecting both species.
Researchers report a Triassic-era fossil that may be an ancestor of modern salamanders, extending the fossil record by 60-74 million years. The discovery provides insight into the evolution of salamander-like body plans and suggests Eurasia as the point of origin for salamanders.
Researchers found that salamanders' ballistic tongue projection is less temperature-dependent than muscle-powered systems, relying on elastic-spring mechanics to achieve extreme performance. The study identified key morphological features, including rearranged collagen structures, as central to the function of this system.
Scientists at the University of Tennessee Institute of Agriculture have discovered that host contact rates and habitat structure significantly impact the transmission of Bsal among eastern newts. Adding habitat complexity and reducing population density can curtail transmission rates, similar to COVID-19 mitigation strategies.
A new conservation tool has identified top priorities and projections of what species would benefit from increased conservation dollars. The algorithm considers diverse data, including land acquisition costs, development patterns, budget allocations, and threatened species, to find optimal protection opportunities.
A recent study published in African Journal of Ecology found that naked mole rats do not disperse according to moon phases. Captured dispersing naked mole rats showed no correlation with full moon or new moon, suggesting cues from the social environment may be triggering this behavior.
A study reveals biofluorescence is widespread among amphibians, including salamanders and frogs, which may aid in finding each other and avoiding predators. The phenomenon's mechanisms are linked to the presence of fluorescent proteins and compounds in skin, secretions, and bones.
Researchers identified a new genus and species of salamander from the Middle Jurassic period, approximately 166-168 million years ago. The fossil discovery provides insight into the evolution of stem salamanders and their ecological niches.
Researchers at Clemson University discovered that salamanders use temperature rather than humidity to anticipate changes in their environment, and harness limb regeneration to minimize the impact of hot temperatures. This adaptation may have implications for other animals and plants, and could provide insights into regenerative medicine.
A research team has successfully identified an unknown population of the endangered Yamato salamander in Gifu Prefecture, Japan. Using a combined methodology of GIS and eDNA analysis, they discovered five new potential habitats for the species.
Researchers found that streamflow variability can negatively affect the survival of salamanders as they transition from larvae to adults. The study suggests that climate change will exacerbate this issue, highlighting the need for long-term monitoring and protection of vulnerable headwater ecosystems.
Researchers at the University of Guelph discovered that meat-eating pitcher plants in Algonquin Park wetlands consume not just bugs but also young salamanders. The plants' digestive enzymes break down prey, which may help them obtain essential nutrients like nitrogen from poor bog soil.
Researchers have made the largest individual record within the genus Gyrinophilus and the Plethodontidae family in the United States. The discovery is reexamining growth limits of cave-obligate salamanders in harsh environments, highlighting the hospitability of underground ecosystems.
New research by Oregon State University suggests that coastal cutthroat trout and giant salamanders can recover from drought conditions within just a few years. The study found that the fish populations were negatively affected by hot, dry summers, but recovered quickly in predrought form.