Articles tagged with Animal Research
Researchers have discovered a microscopic parasite in fish that's a close cousin to jellyfish, challenging current animal kingdom classifications. The study found that myxozoans, a group of parasites, are highly degenerated cnidarians, sharing essential genes with jellyfish.
Researchers analyze salamander hunting skills to understand how animals compensate for sensorimotor delays. By predicting prey movement, salamanders successfully catch over 90% of their targets. The study's findings provide new insights into human motor processing and prediction strategies.
Researchers demonstrated that specific regions in the brain represent sweet and bitter tastes, allowing for control over sensory perception and behavioral actions. Silencing or activating these regions can evoke different taste perceptions, including sweet or bitter, without actual tasting.
Researchers have identified Ophidiomyces ophiodiicola as the definitive cause of snake fungal disease (SFD) in eastern US snakes. The fungus causes skin lesions and can lead to mortality rates of up to 100% in some species, threatening extinction.
A novel mouse study finds that modulating the brain's stress circuitry with a CRF-antagonist significantly prevents Alzheimer's disease neuropathology and cognitive impairment. The treatment reduced amyloid plaque generation and cellular damage, suggesting a potential therapeutic approach for AD prevention.
A meta-analysis of 75 studies found that birds in urban areas are more tolerant of humans than those in rural areas, while larger birds are more tolerant than smaller ones. This challenges previous recommendations about large-bodied species being vulnerable to human presence.
Researchers have discovered a mouse-sized mammal fossil dating back to the Middle Jurassic, which belonged to a single species of 'stem therian' mammal. The new findings indicate that three previously recognized species are actually one, providing novel information about early mammal evolution.
Researchers at the University of Kansas sequenced the genomes of microscopic parasites known as myxozoans, revealing they are highly reduced cnidarians. The findings challenge traditional definitions of an animal and could have commercial implications for aquaculture.
In a study by Oxford University researchers, wild birds chose to stay close to their partners over accessing food, even when it meant spending less time foraging. This demonstrates the importance of social relationships for wild birds and shows how individual behavior can be shaped around maintaining key relationships.
Researchers at the University of Georgia are studying the effects of feeding wildlife at public parks on the health and ecology of white ibises in south Florida. The study found that being fed by humans is changing the behavior of the birds, making them more susceptible to disease.
A study published in Journal of Experimental Biology found that hair allows animals to both get dirty and remain dirt-free. The research team found that a honeybee has nearly 10 billion hairs, while the human head has just 100,000, making their true surface area 100 times greater than their skin surface area.
A comprehensive assessment of hop pests and their natural enemies has been published to help northeastern hop farmers manage insect pests. The study found that natural enemy populations can control economically damaging pests like twospotted spider mites and hop aphids without the need for insecticides.
The Indian star tortoise is being poached on a massive scale, with at least 55,000 individuals seized in a single year from one trade hub in India. The tortoises are sold to consumers for exotic pets or spiritual purposes, often for low prices, threatening their conservation and welfare.
Researchers at the University of Georgia have identified Tpl2 as a key regulator of immune signaling proteins called interferons, which play a large role in host defense against viral infections. The study found that Tpl2 promotes induction of antiviral genes and protects against influenza virus infection.
The study has tremendous potential to improve our understanding of early development, enhance disease modeling, and promote therapeutic discovery. Researchers believe that work on chimeric embryos is vital to advance this field despite ethical concerns.
Researchers unveil two archaic aquatic carnivorous amphibian species from northeastern Brazil, shedding light on animal dispersal during the Permian period. The discoveries reveal a previously unknown geographic gap in knowledge about ancient life.
A team studied the proteins and genes that allow squirrels' hearts to stay healthy during winter hibernation, a phenomenon that could help researchers develop better treatments for people with cardiac disease. The study found dozens of proteins and protein signaling pathways that are expressed differently during hibernation.
A large-scale study reveals the hepatitis A virus is likely of animal origin, with viruses from small mammals showing similarities to the human virus. The discovery offers new perspectives for risk assessments and may hint at a distant ancestry in primordial insect viruses.
Researchers tracked juvenile cowbirds using automated telemetry systems, finding they leave host nests at dusk and spend nights in nearby fields before returning just after daybreak. This behavior helps young birds avoid imprinting on their host parents and learn essential survival skills.
West Nile virus is killing millions more birds and affecting many more species than initially thought. Survival estimates dropped dramatically in nearly half of the 49 studied species, highlighting the long-term effects of the disease. The research provides a warning for future infectious diseases that may affect humans as well.
Researchers studied theta rhythm and grid cell function to better understand navigation. They found that velocity modulation conveys critical information for grid cell signal generation, suggesting a new understanding of the brain's inner GPS.
The new approach uses a single chemical compound that makes cancer cells glow when exposed to near-infrared light, allowing for more effective removal of tumors. In laboratory tests, tumors were completely eradicated without side effects, and the treatment showed promise in targeting specific cancers.
Researchers found that growth and differentiation factor 10 (GDF10) is a crucial protein in the brain's repair mechanisms following stroke. Studies suggest that increasing GDF10 levels can lead to faster recovery after stroke.
Researchers have discovered highly conserved DNA sequences in non-coding regions of insect genomes, which are remarkably preserved for at least 180 million years. These findings provide new insights into the evolution of ancient animal ancestors and their influence on modern species.
Every year, thousands of people in impoverished communities die from snakebites due to the unavailability and high cost of anti-venom treatment. Despite efforts to address this issue, many countries remain unable to provide affordable solutions.
Researchers can improve research and reduce costs by replacing animal-derived antibodies with modern technologies like recombinant antibodies and aptamers. This switch has the potential to save tens of thousands of animals from suffering in laboratories.
New research supports the idea that human hunting contributed to the decline and extinction of large mammals in the Americas. The study found that the animals' demise began between 13,300-15,000 years ago in Alaska and spread southward across North America and into South America.
A new study reveals that the loss of large land animals, whales, and seabirds has disrupted the global nutrient cycle, with a significant reduction in phosphorus transport. The researchers calculate that the ability of these animals to transport nutrients around the globe has been reduced to just 6% of its former capacity.
A new study synthesizes research on trophic rewilding, outlining key priorities for rewilding science. The study concludes that species reintroductions and ecological replacements can restore lost food-web cascades with strong ecological effects.
Researchers found that intense attacks from packs of large carnivores, including lions and sabertooth cats, helped keep herbivore populations in check. This study challenges the long-held assumption that mammoths, mastodons, and giant ground sloths were limited by reproductive timing due to resource scarcity.
Researchers at CWRU identified key neurons in cockroach brain that control movement, including speed and direction. By stimulating these neurons, scientists can replicate the insect's movements, shedding light on how insects navigate and providing insights into robotic navigation systems.
Researchers at the Max Planck Institute for Ornithology found that birds can save energy and time by using optimal wind conditions. They calculated global aerial flyways that allow efficient traveling, suggesting a new strategy for migratory birds to reduce travel time and increase reproductive output.
Takashi Yoshimura, a professor at Nagoya University, has made outstanding contributions to thyroid hormone research. His discoveries on seasonal reproduction in birds, mammals, and fish are expected to advance human reproductive health and mood disorders related to seasonal changes.
Researchers have found a way to enable ultra-rapid drug delivery to the gastrointestinal tract using ultrasound waves, which could aid in treating inflammatory bowel diseases. The technology, tested in pig and mouse models, showed improved absorption of insulin and mesalamine, paving the way for potential new treatments.
A new dynamic social-network analysis tool has revealed that the two species have vastly different community structures, with zebras forming large, stable groups and onagers forming smaller, more transient groups. This study provides insights into the adaptive value of these behaviors in response to different environmental pressures.
A team of Penn researchers analyzed 114 large animal studies on cartilage repair to determine adherence to federal guidelines. They found that most studies did not follow the guidelines, particularly when evaluating study outcomes, and suggested that a standardized reporting structure be implemented to improve translation.
Researchers found that female rats exposed to high doses of BPA since fetal development struggled to find their way in a maze test, suggesting cognitive changes. The effects varied by dose and were associated with molecular changes in the brain.
Researchers studying Lake Malawi cichlids and mice aim to understand how fish regenerate teeth and develop new teeth in humans. The study reveals potential genetic pathways for tooth regeneration in humans, but more research is needed to make it viable.
Researchers at University at Buffalo have discovered that the Huntingtin protein controls the movement of Rab proteins in neurons, which can lead to neurological problems if disrupted. The study sheds light on an enduring neuroscience mystery: the root causes of Huntington's disease.
A team of researchers from Caltech analyzed eggshells from sauropod dinosaurs, bird-like oviraptorid dinosaurs, and Titanosaurs to determine their body temperatures. The results showed that smaller dinosaurs had lower basal metabolisms, while larger ones maintained warm temperatures similar to modern mammals.
Researchers used high-performance computing methods to map climate change threats to birds, mammals, and amphibians across the Western Hemisphere. They found that tropical species will likely be vulnerable to climate change by 2100 due to narrow climatic ranges.
Researchers detected parabens and their byproducts in tissues of marine mammals like dolphins, sea otters, and polar bears. High levels were found in some species, with tens of thousands of nanograms per gram of tissue.
A study published in PLOS Biology suggests that tougher guidelines on animal research can lead to improved outcomes for developing new medicines. The analysis found that only a minority of studies reported using random assignment and researcher blinding, which are essential to minimize bias.
Biologists at the University of York have found that there is no simple relationship between insect diet and diversity, with some plant-feeding groups being incredibly rich while others are not. The study suggests that other factors play a greater role in explaining diversity.
Researchers at Florida State University have created the first complete bird family tree, showing that all land birds diverged from a group of dinosaurs. The study reveals unexpected relationships between different bird species, including the connection between hummingbirds and nightjars.
A new grant from the NIH will support the creation of a national chimpanzee brain resource at GW University, providing access to tissue samples, MRI scans, and data for scientists. The resource aims to promote further study of chimpanzee brains for future generations.
A new study suggests that girls who suffer a concussive bump on the head in childhood may be at increased risk for abusing alcohol as adults. However, research found that female mice living in an enriched environment reversed this effect by reducing drinking and degeneration of axons.
Researchers from UNC and NC State create fully functioning human gut models on a chip, using primary cells derived from human biopsies and sophisticated architecture to mimic the gut's structure and function. This breakthrough enables personalized exploration of gut behavior during healthy and diseased states.
Researchers identified the molecular properties of mammalian melanopsins, a photopigment involved in non-visual photoreception. They found that these proteins possess less stable bonds with retinal, contributing to lower photosensitivity and diverse attachment stability among species.
Researchers developed a test-bed to study animal movement on soft ground, revealing key principles for robotic design. The findings, published in Bioinspiration & Biomechanics, suggest that robots can mimic the locomotion strategies of animals, such as sandrunners and forest dwellers, to improve their performance on challenging terrain.
Aydin Farajidavar's grant will create a safe method to monitor stomach electrical impulses and rhythmic movements. The device, called WINGS, will be wirelessly recharged and transmit data on stomach signals to doctors.
NYU researchers found that fish and birds can move in two distinct speeds when swimming in groups, with one speed conserving energy and the other allowing for faster escapes from predators. The study's innovative methodology mimics infinitely large schools using robotic wings and water tank, offering insights into air and water flows.
Researchers found that Eurasian reed warblers use a geomagnetic map to navigate during migrations. The birds can reorient themselves towards their original destination even after being exposed to a different magnetic field.
Rats exposed to frequent stress during adolescence showed improved problem-solving skills and foraging efficiency under high-threat conditions in adulthood. This study provides insights into how humans respond to adolescent stress and may inform research on human maltreatment and adverse environments.
Several laboratories are developing exercise pills targeting skeletal muscle performance, aiming to improve strength and energy use. However, the benefits of exercise extend beyond muscular improvements, and it's unrealistic to expect pills to fully substitute physical exercise.
Scientists have created a nematode model using Caenorhabditis elegans to study cardiac arrhythmias. The model uses the nematode's feeding apparatus, which resembles the mammalian heart's muscle cells, to test substances for treating genetic arrhythmias.
Researchers found that sensory feedback shapes motor variability, allowing for normal behavior and adaptation. The study suggests maintaining variability is essential, contrary to the common view of it as a problem to overcome.
Researchers at the University of Georgia found that the same genetic tools responsible for limb development in animals also control the formation of external genitalia in snakes. The study suggests that snakes retained DNA associated with limb development through millions of generations, as it may have been important for their reproduc...
A new test called ViroCap can detect viruses at low levels and identify variant strains, making it especially useful in situations where diagnosis remains elusive. The test increases sensitivity by 52% compared to standard testing, providing detailed genetic information about viral subtypes.
A new study using competing mice reveals genetic mutations can impair reproduction and territory control, contrary to previous assumptions of redundant gene functions. The mouse barn test provides a sensitive tool for assessing fitness consequences of gene changes in natural environments.