Vertebrates show variation in species numbers among groups, with land animals exhibiting higher diversification rates, suggests a study by UA evolutionary biologist John Wiens. Habitat is likely a more important variable than climate or metabolic rate explaining species richness.
Researchers have identified two species of Brazilian frogs that are venomous, using their heads as a weapon to deliver toxic secretions. The discovery sheds light on the biology of amphibians and their interactions with predators in the wild.
A Nova Southeastern University researcher has discovered a new deep-sea fish species, the Ceratioid anglerfish, found between 1,000-1,500 meters depth in the Gulf of Mexico. The three female specimens, considered type specimens, will reside in the Ichthyology Collection at the University of Washington.
A team of scientists has identified potential probiotics for frogs to combat the devastating chytrid fungus. The researchers found dominant bacterial species that may provide disease resistance and antifungal properties to their host. This discovery holds promise for protecting vulnerable amphibian populations worldwide.
A global study found that large animals consume a broader range of seed sizes than previously thought, posing a risk to smaller plant species. The research, led by UNSW Australia scientists, analyzed over 13,000 animal-seed interactions and showed that even small seeds are vulnerable if large animals disappear.
The newly discovered Rhombophryne longicrus is an unusually long-legged new species of frog from Madagascar that challenges the traditional burrowing behavior of its relatives. Genetic analyses reveal close relationships to another diamond frog species, highlighting concerns over extinction due to habitat destruction.
Researchers have identified two signaling molecules required for proper cochlea development. The study contributes to understanding of inner ear development and its potential goal of regenerating sensory hair cells, a key step toward reversing hearing loss in mammals.
A new study published in Nature Climate Change suggests that climate change will not lead to widespread interbreeding among closely related species. Only about 6 percent of species with non-overlapping ranges are likely to come into contact by the end of this century.
A new $20,000 grant from the National Geographic Society will support Chan Kin Onn's research on revealing the hidden diversity and riverscape genetics of reptiles and amphibians in Malaysia. Through genetic analysis and ecological niche modeling, Chan aims to catalog and conserve species threatened by habitat destruction.
Researchers found that exotic fish can amplify viral levels in garden ponds, while chemicals like slug pellets weaken frog immune systems. Simple precautions, such as reducing chemical use and not stocking non-native species, can help reduce the spread of the devastating ranavirosis disease.
Researchers from the University of Sydney have found a humane way to kill cane toads by placing them in a refrigerator for a few hours before transferring them to a freezer. This method induces unconsciousness without causing pain, solving a long-standing dilemma for communities affected by the invasive species.
Invasive earthworms in New England's forests are bioaccumulating high levels of toxic metals, including lead and mercury, which may harm birds, amphibians, and mammals that feed on them. The Dartmouth-led study found similar situations in forests across the northeastern United States.
Researchers from Oregon State University found zebrafish produce a chemical called gadusol to protect against UV radiation. Gadusol's successful production in yeast opens the door to large-scale commercialization.
Researchers discovered that many fish, amphibians, reptiles, and birds can naturally produce gadusol, a compound providing protection from ultraviolet sunlight. This ability may have been obtained through prehistoric genetic engineering, with the gene found in algae transferring it to vertebrate animals.
Researchers suggest families choose pet species that carry fewer diseases, such as dogs or cats, and follow general recommendations like handwashing and cleaning cages. The review aims to reduce zoonotic disease transmission among vulnerable groups, including infants and those with compromised immune systems.
Household pets can transmit infection to people, especially those with weak immune systems. Surprisingly, the general public and people at high risk for pet-associated disease are not aware of the risks associated with high-risk pet practices or recommendations to reduce them.
A scientific review synthesizes decades of discoveries on the evolution of whales, dolphins, seals, and other species that adapted to aquatic environments. The study highlights how life in the ocean has responded to environmental change over time, informing an understanding of human impacts on marine species today.
A study published in PLOS ONE created a 3D model of the Chinese giant salamander's bite, revealing its feeding mechanism involves capturing prey in front and biting quickly to the side when approaching. The analysis shows the salamander's unique skull architecture may be related to this ability.
Six CCNY graduates have been named National Science Foundation (NSF) Graduate Research Fellows for their exceptional proposals in biology, environmental engineering, bioengineering, chemical engineering, and geochemistry. The fellowships provide annual stipends and cost-of-education allowances to support graduate study.
Researchers have made significant progress in understanding the complex relationship between bacteria and the deadly frog disease chytrid fungus. The study found that only a small proportion of bacteria inhibited all forms of the disease, highlighting the need for diverse probiotic treatments to combat its shifting targets.
Scientists at the University of Granada have confirmed Bergmann's rule for ectotherms, revealing that long-tailed lizards are larger and retain heat longer in high-altitude habitats. This study resolves decades-long debates on the mechanism behind the Bergmann clines, showing that larger animals indeed have slower cooling rates.
The $670,797 grant will support research on biodiversity in West and Central Africa, with a focus on amphibian and reptile wildlife. The project aims to identify the processes driving high species diversity in the region and develop efficient approaches for maintaining biodiversity.
A Louisiana State University chemistry professor has secured a grant to study the habits of the elusive three-toed amphiuma. The research aims to document the animal's life cycle and determine if they are territorial using radio transmitters, underwater cameras, and video recordings.
A previously undiscovered species of giant salamander-like amphibian was identified in southern Portugal, growing up to 2m in length and feeding mainly on fish. The discovery reveals that this group of primitive amphibians was more geographically diverse than previously thought.
A new study identifies 15 animal species at the highest risk of extinction due to low conservation opportunities. Researchers estimate that conserving these species would require a significant investment of $1.3 billion annually.
By channeling food to large individuals, fish biomass doubles, highlighting the importance of size-dependent efficiency in population growth. This study has significant implications for fisheries management and predator-prey interactions.
Researchers at Benaroya Research Institute have discovered that chitin, previously thought to be absent in vertebrates, is endogenously produced in fishes and amphibians. This finding challenges longstanding biological assumptions and opens up new avenues for biomedical applications.
A new study reveals that female killifish avoid mating with males of closely related species and also tend to shun males of their own species if they come from an unfamiliar population. This phenomenon, called cascade reinforcement, can lead to the early stages of speciation.
Researchers found that deadly frog fungus Batrachochytrium dendrobatidis has been present in Illinois and Korea since the 1880s, with stable dynamics for over 100 years. This discovery helps scientists better understand the disease caused by Bd and its survival conditions.
Researchers detect deadly chytrid fungus in Madagascar, threatening its unique amphibian population. The discovery highlights the global pandemic's impact on biodiversity and calls for continued monitoring and breeding programs.
A new study by PETA found a staggering 73% increase in the number of animals used in US laboratories between 1997 and 2012, despite industry claims of reduced animal use. Mice usage accounted for a 72.7% increase due to genetic modification experiments.
A study found that diverse small predators, like dragonfly larvae, reduce parasitic flatworm infections in frogs. The research suggests a link between dwindling global biodiversity and increased infectious diseases.
A study by USF biologists reveals that an abundance of predators can help control parasite transmission in amphibians, potentially reducing disease risk. The researchers identified a key trait of predators that predicts their ability to dilute disease risk.
Studies on lungfish and salamander hearing shed light on the evolution of aerial hearing in early terrestrial vertebrates, suggesting they could have detected airborne sound without a tympanic middle ear. The research provides insight into the development of hearing 250-350 million years ago.
A UNSW-led study demonstrates long-term control of cane toads by erecting fences around dams, effectively converting their invasion refuges into ecological traps. The approach could work on a large scale to halt the spread of these toxic amphibians across Australia.
The study found that disease was the primary culprit, accounting for 26% of mass die-offs, while direct human effects and biotoxicity from algae blooms contributed significantly. The number of mass mortality events has been increasing by about one event per year over 70 years.
A new report from the Lasker/IRRF Initiative for Innovation in Vision Science explores approaches to restoring sight to those with retinal degeneration. The initiative aims to identify promising methods and accelerate discovery of treatments.
A team of scientists completed the largest whole genome study of a single class of animals to date, sequencing and comparing full genomes of 48 bird species. The study resolves early branches in the tree of life of modern birds, providing new insights into their evolutionary history and adaptation to different lifestyles.
A meta-analysis of studies on reduced-impact logging (RIL) and conventional logging found that RIL causes smaller shifts in species abundance and less harm to birds, arthropods, mammals, and bats. RIL certified timber can support the diverse benefits of tropical forests and promote sustainable forestry practices.
A rarely seen tapeworm, Spirometra erinaceieuropaei, has been sequenced for the first time, revealing its genetic secrets. The parasite was detected in a UK resident's brain after traveling 5cm from one side to the other.
A new UCSB study reveals that a fungal pathogen in amphibians disrupts the skin microbiome, leading to dramatic changes in bacterial communities. The research has significant implications for understanding infectious disease dynamics and developing responses to diseases causing amphibian extinction.
Allocating $45-76 billion to protected areas annually could help manage them effectively, ensuring their contribution to the planet's well-being is met. Many threatened species and plants rely on well-managed protected areas for survival.
A deadly fungus, Batrachochytrium salamandrivorans, is threatening wild populations of fire salamanders in Europe and may reach the US through international trade. Scientists are warning that the fungus could have devastating effects on North America's salamander biodiversity.
A recent study by Germán Orizaola and colleagues found that female frogs can influence the growth rate and development of their offspring in response to changes in reproduction dates. By delaying breeding, females can accelerate larval growth, potentially helping species adapt to environmental uncertainty.
A previously unknown fungus, Batrachochytrium salamandrivorans, discovered in the Netherlands, poses a significant threat to European salamander populations. The fungus is found in amphibians from Thailand, Vietnam, and Japan but has only been detected in Europe recently.
A Rutgers researcher and team of scientists have proven the existence of a new frog species living in wetlands from Connecticut to North Carolina. Named Rana kauffeldi, it was initially dismissed by naturalist Carl Kauffeld's claim in 1937.
Researchers found that bright coloration preceded louder, more complex calls in certain species of poisonous frogs, which helped protect them from predators. This led to the development of unique vocalizations, with females preferring lower-pitch, pulsing calls.
Researchers have found that emerging viruses are causing severe disease and mass deaths in many amphibian species, including frogs and salamanders. The viruses, part of the Ranavirus group, are being spread through human activities and are having a devastating impact on entire host communities.
A recent study reveals that two viruses have led to the collapse of three amphibian species and impacted six others in northern Spain, causing severe disease and mass mortality.
Researchers analyzed Madagascar's lizard, snake, frog, and tortoise populations to understand how biodiversity hotspots come to be. Climate change and land use affect different species differently, with some doing better while others decline.
Researchers found that chickens have a limited number of bitter taste receptors but can compensate with a wider tuning range. Frogs, on the other hand, have more receptors and a mix of broad and narrow tuning capabilities. This diversity may be an adaptation to their environment, which includes both land and water.
A study found that warmer winters lead to earlier breeding in wood frogs, resulting in fewer eggs and delayed tadpole development. However, more rain and snow appear to increase egg production, potentially counteracting the negative effects of warming.
A study in Diversity and Distributions documents the discovery of 27 new vertebrate species in Tanzania's Eastern Arc Mountains, including 23 amphibians and reptiles. The region's exceptional biodiversity is attributed to factors such as forest extent, elevational range, and rainfall.
A study found that modern methods for predicting species distributions under climate change often leave out rare and threatened species. In Africa, over 90% of listed species are missed by popular tools, despite these species being critical to conservation efforts.
The European Union's Natura 2000 network has a positive impact on maintaining biodiversity, but lacks connections between protected areas. The researchers recommend establishing minimum standards for conservation in these areas to improve species migration and genetic stability.
A study published in BioScience argues that the US Environmental Protection Agency's pesticide risk assessment practices are flawed, inviting bias towards industry interests. The agency's reliance on manufacturer-funded studies and rigid inclusion criteria may lead to incomplete assessments. The authors recommend improving the process ...
Hansen's tree frog embryos hatch earlier after being preyed upon by katydids, responding to chemical cues. This flexible hatching behavior allows the frog an adaptive advantage, as it gives them time to escape into the next life-stage.
Researchers at McGill University studied a living fish, Polypterus, to understand the evolution of tetrapods. The fish showed significant anatomical changes, including modified fins and increased support during walking.
A large-scale biogeographic analysis by GW researcher Alex Pyron shows that amphibians have moved across the planet throughout time, with some species dispersing long distances over water. The study reveals three major processes driving their distribution: vicariance, dispersal, and unexpected oceanic dispersals.
The Reptile Database has recorded over 10,000 known species, making it the most diverse vertebrate group after fish and bird species. The 10,000th species, Cyrtodactylus vilaphongi, is a tiny gecko discovered in Laos.