Articles tagged with Salamanders
Research reveals that genetic divergence, rather than ecological adaptation, is responsible for the reproductive isolation of lungless salamander populations. The study found strong associations between genetic and ecological divergence, but only nuclear divergence was linked to hybridization.
Researchers developed a chemical cocktail to convert mouse muscle fibers into cells that form the first stages of regenerating limbs. The methods have implications for regenerative medicine and stem cell biology, potentially speeding wound healing and creating new tissues.
Scientists have discovered algae living inside the cells of developing spotted salamanders, marking the first known example of a eukaryotic algae endosymbiont in vertebrates. This finding highlights the complexity of animal-algae interactions and raises questions about the evolutionary origins of mitochondria and chloroplasts.
Despite decades of research suggesting UV radiation was a major contributor to amphibian declines, new findings reveal that natural water conditions and female behavior are more significant factors in protecting embryos from harm. Amphibians exhibit adaptations such as laying eggs in shaded areas when water clarity puts them at risk.
Researchers tracked salamander movements across all three life stages to understand population stability. The study found that overland movement increased the likelihood of population persistence under low to moderate extinction risk scenarios.
A multi-institutional team is using genomic tools and the Mexican axolotl salamander to understand regenerative capacity after spinal cord injury, stroke, and other neural conditions. The goal is to tap unused human capacities to treat these conditions.
Researchers found that salamanders' regenerative cells retain the 'memory' of their original tissue, contributing only to the same type of tissue. This suggests that harnessing salamander's regenerative wonders may be within the realm of possibility for human medical science.
A Purdue University study found that animals make complex decisions about choosing mates, considering multiple factors beyond major histocompatibility complex (MHC) genes. Tail length also plays a role in reproductive success, with larger males being more likely to be chosen as sires.
Researchers found that birds target salamanders with dominant traits more frequently, even when the ratio of these traits changes. This suggests that predators prioritize common prey forms, allowing unusual traits to persist.
Scientists found that 26-73% of fishers used tiger salamanders as bait and 26-67% released them into fishing waters. A quarantine program could help prevent the introduction of non-native pathogens into threatened populations.
A new study by University of California, Berkeley biologists reveals that many common salamander species have plummeted in Central America, contradicting previous attributions to habitat destruction and pesticides. Instead, researchers believe global warming is driving these species to higher elevations where habitats become inhospitable.
A new University of Missouri study examines the effect of golf courses on salamander populations, finding suitable habitats for species native to the area. The researchers propose managing landscapes for human recreation and biodiversity preservation, creating a win-win situation for stakeholders and wildlife.
A new study by Purdue University researchers found that inbreeding is not responsible for the high incidence of malformation among salamanders. The study of 2,000 adult and juvenile salamanders revealed an 8% rate of deformities, including missing or extra digits, similar to those seen in frog species.
Stanford researchers found a catastrophic decrease in frog and salamander populations in Yellowstone's ponds due to high temperatures and drought. The amphibians need ponds for their young to hatch, but drying water kills eggs that are unsuitable for gestation on land.
Researchers found a greater diversity of animals in areas with deer populations than without. Higher deer activity creates nutrient-rich soil, attracting insects and larger predators like salamanders and snakes. This complex food web is often overlooked in traditional wildlife management practices.
The Gerobatrachus fossil provides key evidence for the evolution of modern amphibians from one ancient group, resolving a long-standing controversy. It suggests that frogs and salamanders separated around 240-275 million years ago, contrary to previous estimates.
A recent MU study found that black-bellied salamanders play a crucial role in the productivity of headwater streams, contributing significantly to the food chain. The research suggests these salamanders are a key link in the ecosystem, consuming aquatic insects and supporting other species.
Researchers found that hybrid young salamanders survived more in the wild than pure native or introduced species, challenging prevailing scientific thought. The study raises questions about managing endangered populations and considers hybrids as threats to native salamanders.
A recent study by a UT researcher found that hybrid salamanders are thriving in California water bodies, contradicting the general understanding of hybridization in animals. The hybrids, created by mating between two different species, show surprising vigor and may even enhance the chances for survival of the native species.
A new invention, Gasclam, can continuously monitor underground methane levels, allowing for more efficient brownfield development. This technology could lead to increased construction on previously restricted sites.
Researchers have identified a bacterium that repels a deadly fungus causing worldwide amphibian deaths and extinctions. The discovery could lead to procedures for 'vaccinating' endangered populations.
A long-term study found that salamander exposure to atrazine had persistent effects on mortality rates, even after recovery. Survivors of the exposure suffered lower survival rates compared to those not exposed to atrazine.
A group of European researchers developed a spinal cord model and implemented it in an amphibious salamander-like robot. The robot changes its speed and gait in response to simple electrical signals, suggesting that the distributed neural system in the spinal cord holds the key to vertebrates' complex locomotor capabilities.
Researchers found that spotted salamanders, wood frogs, and American toads employ various defense strategies to avoid water mold infections, including protective jelly layers and early hatching. These mechanisms help reduce mortality rates and increase survival chances for the amphibian species.
Researchers at Ohio University found that salamanders and the ancient lizard-like animal tuatara can both walk and run on land, using energy-saving mechanisms similar to those in fast-running animals. This discovery suggests that these early vertebrates may have had a key role in shaping the evolution of locomotion in later species.
A study published in BMC Biology found that Oklahoma salamanders metamorphose into more terrestrial adult forms in fine, tightly packed gravel streambeds and retain juvenile forms in large, loosely packed particles. The researchers discovered a strong negative correlation between small streambed sediments and paedomorphosis.
Researchers analyzed fossil records of Tiger Salamander to track morphological traits over the last 3,000 years. The study found that paedomorphic individuals were smaller than terrestrial adults during the Medieval Warm Period, reflecting a response to warm and dry climate conditions.
A newly discovered lungless salamander in Korea has significant implications for the understanding of amphibian evolution and biogeography. The species, named Karsenia koreana, is distinct from other lungless salamanders and sheds light on their historical distribution across Asia and Europe.
A study by Rachel Mueller and David Wake rewrites the evolutionary history of salamanders, finding inconsistencies with accepted classifications. The research suggests that some terrestrial salamanders regained their larval stage after moving back to water, contradicting previous assumptions.
A recent genetic analysis found a viral strain linked to the decline of amphibian populations in the US, which may have been introduced through live bait and infected salamanders. The study suggests that emerging diseases are having a major effect on ecosystems globally.
Scientists discover five new species of salamanders from Asian sites, including Chunerpeton tianyiensis, which closely resembles the North American hellbender. The newly found species offer unique features such as unicapitate ribs, with implications for understanding the evolution of salamander families.
A study by Rothermel and Semlitsch found that juvenile amphibians preferentially use corridors of natural vegetation to move through fragmented forests. The researchers also discovered that these animals lose more water in open fields, making forest habitats a safer choice for survival.
Researchers found salamanders with unusual, asymmetrical spots in a pond on an Ithaca golf course, suggesting environmental stress. The study compared 60-year-old samples with contemporary ones, showing a significant change in spot symmetry.
Research shows that ant diversity near forest fragments is higher in shade than sun coffee farms, and salamander abundance is higher in disturbed streams confluent with undisturbed ones. Conservation efforts may focus on making surrounding areas more conservation-friendly rather than connecting fragments.
Zoologists at UC Berkeley have discovered a new species of salamander in southeastern Mexico that was mistaken for another species due to identical appearance. DNA analysis revealed the two species evolved from different ancestors despite shared adaptations to burrowing.
Researchers at Arizona State University have identified a viral infection as the likely cause of mass salamander deaths in various regions. The iridovirus, typically found in insects, was detected in infected salamanders across North America and Australia.
Scientists have pinpointed a protein called plethodontid receptivity factor (PRF) that directly influences female receptivity in salamanders, shortening the courtship time by 15%,. This discovery highlights the importance of pheromones in survival and provides insights into the evolution and mechanism of action of these complex chemicals.
A team led by Owen Sexton successfully repopulated ponds with wood frog and spotted salamander egg masses, resulting in healthy and thriving populations. The reintroduction showcases the importance of habitat preservation and genetic similarity in facilitating amphibian dispersion and adaptation.
A five-year study on salamander populations in southern Appalachian forests reveals that canopy disturbance has a significant impact on their abundance. The results suggest that forest managers may need to adopt more intensive management practices to maintain salamander populations.