Articles tagged with Vertebrates
Researchers studied the Seychelles warbler's gut bacteria, finding that immune genes influence which microbes thrive, and that this relationship affects host health and survival. The study suggests a two-way relationship between immune genes and gut bacteria, with potential benefits for human health and disease prevention.
A new study reveals that hedgehogs can hear high-frequency ultrasound, up to 85 kHz, which could be used to design sound repellents for cars to deter them from roads. The findings suggest a potential solution to reduce hedgehog deaths, which are a major cause of road traffic accidents.
A new study reveals that the ancient reptile Sonselasuchus, a relative of the crocodile, began life on four legs before learning to walk on two. The discovery was made by analyzing the proportions of the limb skeletons of different animals, suggesting that the creature's bipedal stance may have resulted from differential growth patterns.
The earliest known bird, Archaeopteryx, had unique mouth features such as oral papillae, tongue bones, and bill-tip organs. These structures suggest that early birds evolved specialized ways to find and digest food efficiently, which is key to flight. The discovery provides new criteria for identifying dinosaur fossils as birds.
Researchers identified 48 OR genes, 2 V1R genes, and 135 V2R genes in hagfish, indicating functional roles in smell perception. The discovery overturns the assumption that true V2Rs evolved only in jawed vertebrates.
Researchers found that Gifted Word Learner dogs can quickly learn hundreds of toy names through natural play sessions with their owners. These dogs excel in learning both directly and from overheard speech, similar to human infants.
A new species of Brachycephalus, a tiny pumpkin toadlet, has been discovered in the Serra do Quiriri mountains of southern Brazil. The discovery underscores the importance of conservation efforts in these fragile ecosystems.
Researchers are tracking the New World screwworm's potential return to California, deploying traps baited with a lure that attracts the fly. Early detection is critical to preventing an outbreak, particularly among farm animals vulnerable to wounds. The project aims to raise awareness and prevent infestations if the fly were to reappear.
Penguin populations off South Africa have declined drastically due to collapsing food supplies, with some species facing an estimated 62,000 breeding individual losses. The study suggests that sardine biomass has fallen below a quarter of its peak levels in 17 years, posing a significant threat to the long-term survival of these birds.
A University of Cambridge-led team analyzed giant anaconda fossils to determine their maximum size occurred 12.4 million years ago. The study found that ancient anacondas were four to five metres long, matching the size of modern anacondas, suggesting they have remained giants due to a suitable environment.
Researchers discovered a new 233-million-year-old nonflying relative of pterosaurs that provided breakthrough insights into the evolution of flight in these animals. The study found that pterosaurs evolved their own 'flight computers' from scratch, with unique brain structures and smaller brain sizes compared to birds.
A newly discovered carnivorous lizard, Tainrakuasuchus bellator, lived 240 million years ago and resembled a dinosaur due to its armour-plated body. The species was among the top predators of its time in Brazil during the Triassic Period.
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 reveals that island reptiles are more threatened with extinction than mainland species, yet remain largely ignored by researchers. The study found that 30% of island-dwelling reptiles are threatened, while only 6.7% of reptile-focused research publications have studied them.
A new study reveals that polar bears act as crucial providers for Arctic species, leaving behind millions of kilograms of prey annually. This carrion provides a vital energy source for a wide network of arctic scavenger species, including Arctic foxes and ravens.
Researchers assessed the impact of reactivity in red brocket deer on training efficiency, finding that calm individuals can learn commands like 'Come'. In contrast, more restless individuals had difficulty learning and following instructions.
Recent studies using portable nanopore sequencing technologies document and sequence Amazonian wildlife, increasing representation of Peruvian species in global genetic libraries. This initiative empowers conservationists to generate their own data, making informed decisions to combat species extinction.
A new study explores why certain parts of reptiles, such as lizard jaws and snake vertebrae, are more likely to be preserved as fossils. The research reveals that physical characteristics like bone density and body size, as well as the environment in which the animals lived and died, are major predictors of fossil completeness.
Two new species of black bass, Bartram’s and Altamaha bass, have been documented by UGA ecologists. These fish have distinctive physical characteristics, such as patterned dark brown blotches on their sides and carmine-red eyes with a black pupil ringed by a thin gold margin.
A team of researchers has developed a mathematical model that integrates sensory feedback to enable eel-like robots to swim and crawl on land. The study shows how multisensory feedback enables eels to adapt their movement patterns after spinal cord injury, providing insights into the evolutionary transition of vertebrates from water to...
Researchers discovered a 310-million-year-old fossilized ray-finned fish, Platysomus parvulus, which had a unique 'tongue bite' mechanism to devour prey. This ancient fish's internal anatomy revealed a sophisticated arrangement of tooth plates and gill skeleton, providing insights into the evolution of fish feeding strategies.
Researchers at OIST identified biological processes that support young clownfish adaptation to climate change and warming seas. Exposing juvenile fish to raised water temperatures showed significant changes in liver and pancreas, reducing insulin secretion and increasing oxidative phosphorylation.
Researchers have developed a 'tap-and-go' approach using specially adapted drones to apply monitoring tags to whales. This innovative method significantly speeds up the process while minimizing human interaction with the animals.
A study from the University of Georgia finds that lake sturgeon are reproducing on their own in the Coosa River, with some fish estimated to be over 2 years old. This marks a significant step forward in the reintroduction project, which aims to establish a self-sustaining population of these ancient fish.
A new study has coined the term 'scrumping' to describe great apes' fondness for eating ripe, fermented fruit from the forest floor. The researchers suggest that this behavior may have played a significant role in the evolution of human alcohol tolerance.
Wild great tits exhibit clear behaviors signalling 'divorce' long before the breeding season, according to a study by Oxford researchers. The team used data from the Wytham Woods great tit project and found that faithful birds visited feeding stations with their partners more often than those that went on to divorce.
Cal Poly biological sciences Professor Emily Taylor is co-organizing the worldwide awareness week for snakes, highlighting over 3,500 globally significant species. The event promotes peaceful coexistence between humans and snakes, educating people about their importance in food webs and disease control.
Scientists at the Stowers Institute for Medical Research identified two distinct genes that regulate regeneration of sensory cells in zebrafish. The discovery may guide future studies on hearing loss and regenerative medicine in mammals, including humans.
A new study in iScience journal reveals new insights into the lives of 380-million-year-old lungfish, shedding light on their diet and predatory powers. The research uses high-tech examination of fossilized jawbones to evaluate how multiple species co-existed in a tropical prehistoric ecosystem.
Researchers from Empa's Soft Kinetic group studied the rare scaly-tailed squirrels' unique bodily structure, discovering that their thorn-covered scales help them maintain position and grip onto tree bark. The study aims to inform robotics by adopting morphological structures and behaviors honed through millions of years of evolution.
Researchers found that chipmunks' skulls became larger but teeth shorter due to increased human food availability. Voles' auditory bullae decreased in size possibly to dampen environmental noise. These changes demonstrate the profound impact of humans on wildlife and their environment.
A comparative whole genome analysis of 240 fish species found a strong correlation between loss of the chorion-hardening system and parental egg-care. The team's findings suggest that the loss of key genes, such as alveolin, contributes to this evolutionary bias.
A new study reveals that lagerpetids, relatives of pterosaurs, were able to tolerate a wide range of climate conditions and distributed widely across the globe. In contrast, pterosaurs initially required more humid tropical conditions to fly.
Medaka fish engage in courtship and spawning at midnight to 4 a.m., with peak activity between 2 a.m. and 4 a.m. Researchers conducted continuous observations in an outdoor setting to gain insights into their natural behavior.
Scientists have discovered fossils of multiple bird species in the Arctic, including diving birds and gull-like birds, that were breeding during the time of the dinosaurs. The findings push back the known record of birds nesting in polar regions by 25-30 million years.
The University of Oldenburg has secured funding for three research clusters: Hearing4all, Ocean Floor, and NaviSense. These clusters aim to improve hearing loss prediction, diagnosis, and treatment, as well as animal navigation research. The funding enables the continuation of high-quality research with social relevance.
Researchers at the Cornell Lab of Ornithology have created a complete evolutionary tree of bird species by combining data on 9,239 species. The resulting database can be easily shared and updated as new studies are published.
An 11-year-old Asian small-clawed otter developed left-sided paralysis after a fall, but improved with treatment for a suspected fibrocartilaginous embolus. Follow-up MRI showed a diminished lesion one year later.
A study by researchers at the University of Basel has identified three distinct groups of precursor cells that give rise to different parts of the skeleton in vertebrates. These cells use unique regulatory mechanisms to drive their developmental programs, leading to a more complex and flexible skeletal system.
Researchers compared feathers and bodies of flightless birds and their flying relatives, finding that some features change relatively quickly. The study sheds light on evolution of complex traits that lose original function, and could help reveal which fossil birds were flightless.
A fossil therapsid was found in Mallorca with a skull hole for the jaw muscle and structures that evolved into mammals' middle ear bones. The discovery changes scientists' understanding of when therapsids evolved and tells us about where we come from.
Researchers at Nagoya University have discovered a unique motor control system in frogfish's first dorsal fin, enabling their 'fishing' behavior. The study reveals how motor neurons changed location as their function shifted from swimming to hunting.
Researchers discovered that hummingbird bills are surprisingly flexible and play an essential role in drawing up nectar. The bird's intricate bill movements, combined with its lapping mechanism and Poiseuille flow, make it a rare example of using both fluid collection methods.
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.
Researchers observe Ethiopian wolves foraging on nectar-rich flowers, exploiting a novel plant-pollinator interaction. This behavior is significant as it highlights the complexity of interactions between species in the highlands ecosystem, threatening these rare canines.
Researchers from The University of Texas at Arlington are conducting a DNA analysis project to determine the genetic differences between the rare Dixon's whiptail and the common checkered whiptail. If the two species are found to be distinct, Dixon's whiptail may become eligible for endangered species protection.
Scientists developed VenomCap to analyze venom genes in snakes, shedding light on snake evolution and developing effective treatments for deadly snake bites. The technique enables quicker analysis of thousands of venom-making genes, paving the way for improved antivenom development and global public health.
Researchers have identified a new epigenetic mark, 5-formylcytosine, which plays a crucial role in activating genes during early embryonic development. This discovery sheds light on the regulation of gene expression in vertebrates and has implications for our understanding of human development and disease.
A new study finds that the ancient bird Longipteryx ate fruits, contrary to previous hypotheses that it feasted on fish or insects. The discovery was made by analyzing fossilized seeds in the bird's stomach, which suggest a mixed diet including fruits and possibly insects when they were not available.
A Dartmouth study suggests that social rank determines whether animals prioritize short-term energy consumption over long-term health, with dominant monkeys consuming food quickly to maintain dominance, while lower-ranked monkeys invest time in washing their food to prevent tooth damage. The findings shed light on the disposable soma h...
A team of Harvard researchers has discovered a new species of chordate, Nuucichthys rhynchocephalus, in the Drumian Marjum Formation of the American Great Basin. The fossil provides valuable insights into early vertebrate evolution and biodiversity, as it is one of only four species documenting this stage of vertebrate lineage.
Researchers have discovered that the Greenland shark's metabolism remains unaltered over time, suggesting a key role in its exceptional longevity of at least 270 years. The study also found that metabolic enzymes were more active at higher temperatures, challenging previous assumptions about the species' adaptation to cold environments.
A study published in Science Advances reveals that germ cells drive sex-dependent lifespan differences in vertebrate animals. Removing these cells led to similar lifespans in males and females of the turquoise killifish species. Vitamin D was also discovered to have a role in improving longevity, with supplementation extending life spans.
A new study reveals sex-specific effects of germline regulation on longevity and somatic repair in vertebrates. Removing the germline extends male lifespan and improves stress resistance in females.
Researchers analyzed genomes of 363 bird species and found significant variations in cryptochrome 4 gene, indicating adaptation to environmental conditions. This specialization could be related to magnetoreception in migratory birds.
A team of scientists has unveiled a new gecko species, Cnemaspis vangoghi, named after Vincent Van Gogh's iconic painting The Starry Night. The species was discovered in the Southern Western Ghats of India and features striking colouration reminiscent of one of the artist's most famous works.
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 report that Golgi ribbons are present in non-vertebrates like mollusks and earthworms, suggesting a fundamental function beyond vertebrate specificity. The team's findings indicate that Golgi ribbons might play a role in cell differentiation during embryogenesis.
A new study from the Stowers Institute for Medical Research has discovered that sea lampreys and humans share an remarkably similar molecular and genetic toolkit in their hindbrain development. The research found a crucial molecular cue, retinoic acid, to be involved in both species' brain stem formation.
A study by Harvard researchers found that fish group behavior can reduce energy costs by up to 50%, with coordinated movement allowing for more efficient swimming. By measuring the energetic cost of individual and group movements, the team discovered a J-shaped relationship between speed and energy expenditure.