Articles tagged with Animal Research
Researchers at Henry Ford Hospital found that the peptide AcSDKP provides neurological protection when administered after a stroke, reducing neurovascular damage and improving outcomes. The study also showed that combining AcSDKP with tPA extended the therapeutic window for up to four hours after stroke.
A study published in PLOS Computational Biology found that birds exhibit individual lateralization biases when choosing flight paths, enabling flocks to split and avoid crowding. This allows them to navigate complex environments, such as dense bush and forests, with remarkable speed and accuracy.
A study by Cornell University researchers found that the hybrid zone between Carolina and Black-capped Chickadees is moving northward at a rate of 0.7 miles per year, mirroring warming winter temperatures. The study uses genetic analyses and crowdsourced data to track the birds' movements and identifies females as leading the charge.
Eating a diet rich in animal proteins during middle age may be as deadly as smoking, according to a new study. High-protein diets were linked to a dramatic rise in cancer mortality and an increased risk of early death.
A team of researchers used computer simulations to study the aerodynamics of flying snakes, discovering that whirls of wind surrounding the snake's body provide an extra boost of lift. This unique shape helps the snake glide efficiently through the air, making it a fascinating example of nature's efficient design.
Researchers developed a mouse whole-brain atlas that maps hundreds of neuronal pathways in the cerebral cortex, revealing a highly organized network consisting of eight subnetworks. This study provides an invaluable resource for researchers studying cortical networks and their role in regulating thoughts, emotions, and behaviors.
A new study by the USDA and WCS demonstrates a quarantine protocol that can qualify young bison as brucellosis-free in under three years, enabling their use to seed conservation herds without disease transmission. The study shows no evidence of brucellosis was found in either newborn calves or their mothers.
Research reveals that female lizards' bright orange patches on their underbellies signal peak fertility to males, attracting them with showy behavior. Males also exhibit aggressive behavior towards pregnant females, which can be deterred by the females' display of bright orange color.
Researchers at Queen's University Belfast have developed a method to predict the impacts of invasive species based on their behavior. By analyzing the rate at which an organism consumes resources, they found that 'damaging invaders' consistently have higher curves than native species, leading to population decline and extinction.
Rodents learn visual tasks in a fourth to sixth the number of trials when stimuli are projected onto the floor, outperforming traditional wall projections. Automated visual cognitive research tasks with neural activity recording and brain stimulation can be performed efficiently.
Dr. Gyorgy Fejer has developed a method to create continuously growing macrophage cells in the lab from mice, reducing the need for live animals in research. This could lead to significant reductions in animal usage and improve research effectiveness.
A study published in Nature identified the CA2 region of the hippocampus as crucial for social memory, a function impaired in individuals with autism, schizophrenia, and bipolar disorder. The findings suggest that targeting the CA2 region could lead to new therapeutic approaches for treating these brain disorders.
Researchers have discovered a new species of marsupial in Queensland's Springbrook National Park, the Black-tailed Antechinus. The highly sexed mouse-like marsupial is threatened due to its unique mating behavior, which causes males to die before reproducing.
A recent study suggests that plant speciation may not be influenced by environmental factors, instead emphasizing the importance of seed dispersal and similar habitats. This finding has significant implications for agriculture and climate change, as many crop species are polyploids and may not adapt well to changing climates.
Peru's Manu National Park has been recorded with 287 species of reptiles and amphibians, surpassing the previous record in Yasuní National Park. The park's high species diversity is attributed to its large area and steep topographic variation, despite being only 0.01 percent of the planet's land area.
Researchers developed a catheter-based device with volumetric imaging, enabling better guidance for surgeons in the heart. The device, integrating ultrasound transducers with processing electronics on a single chip, allows for real-time 3-D images and significantly improves patient outcomes.
Researchers observed captive Asian elephants showing signs of consolation towards distressed peers through physical contact and vocalizations. These behaviors resemble empathy and emotional contagion, suggesting a complex cognitive ability in elephants.
An interdisciplinary team proposes a thought-provoking answer to how plants and animals evolved different forms in response to the same mathematical and physical principles. By applying a famous mathematical formula, the team explains decades worth of real-world observations, revealing why plants and animals have similar energy efficie...
A new study reveals a significant increase in Americans' moral opposition to animal testing, with over half of women and young adults opposing the practice. The study found that opposition to animal testing rose among all age groups, including older adults, and across political affiliations.
Researchers have discovered that the oldest land predator, Dimetrodon, had 'steak-knife' teeth with serrated edges, allowing it to efficiently eat large prey. The study suggests a gradual change in feeding habits over 25 million years of evolution.
A team of researchers used DNA testing to analyze preserved plant remains from the permafrost, finding that large ancient mammals roamed areas with abundant forbs. This discovery provides new insights into how these massive animals survived extreme cold conditions.
A new DNA study suggests that the drastic change in vegetation from protein-rich herbs to less nutritious grass may be behind the demise of mammoths and other large mammals. The study shows that the mammoth steppe was dominated by herbs during the last ice age, which may have led to a decline in animal populations.
Researchers have identified a new species of beaked whale, Mesoplodon hotaula, based on DNA analysis and physical characteristics of seven stranded specimens. The discovery sheds light on the elusive habits and low abundance of deep-diving whales in the world's oceans.
Research by Robert Boessenecker uncovers a record of 21 marine mammal species from the San Francisco Bay Area's Purisima Formation, dating back 5-2.5 million years. A new species of fossil whale, Balaenoptera bertae, is discovered, closely related to minke and fin whales.
A genetic mutation affecting a horse's gait has been found to be spread across the world, with highest frequency in Latin American breeds like the Paso Fino. The 'gait keeper' mutation, influenced by human selection, provides a smooth ride and minimal vertical movement.
Researchers at Vanderbilt University discovered that mosquito sperm contain a suite of specialized chemical sensors called odorant receptors, which drive the rapid increase in movement. These findings suggest a new paradigm for regulating insect reproduction and could provide a powerful approach for controlling insect populations.
A new study found that lemur lovers mirror each other's scent-marking behavior and emit similar odors, possibly as a way to defend territory or advertise their relationship status. The study revealed that lemur couples with kids have more similar scents than those without offspring.
Researchers found that wolves can open a box using a method they observed a dog demonstrate, while dogs relied on random selection. The study suggests that wolves' superior problem-solving ability may stem from their reliance on cooperation with conspecifics.
A study found that young adults who cared for animals reported feeling more connected to their communities and having empathy. The quality of the animal relationship was a key factor in developing positive youth development characteristics.
A recent study reveals that the tropics are the main source of global mammal diversity, driven by higher speciation rates and lower extinction rates. The research, published in PLOS Biology, suggests that tropical regions have been a continuous source of biodiversity, allowing for repeated colonization of temperate regions.
Researchers have developed modified forms of spectinomycin that can act against TB bacteria, showing activity against multidrug-resistant and extensively drug-resistant strains in mice. The new compounds, called spectinamides, are targeted to TB bacteria without harming mammalian cells.
Research reveals that Bermuda bluebirds have distinct physiological differences compared to their continental counterparts, with lighter weights and longer wings. The study also found that island nestlings grow slower and face higher mortality rates than their mainland peers.
Researchers at the University of Leicester used intracranial electrodes to record single neurons in epilepsy patients and found a specific brain response marking the timing of these neuron firings. This response, present for consciously recognized pictures, is thought to be a gateway for processing stimuli to form memories.
A new study suggests that early multicellular organisms grew larger to access nutrient-rich currents in the deep seas. The research, published in Current Biology, reveals that these enigmatic life-forms, known as Ediacara biota, reached heights of up to a meter to compete for resources.
Scientists have discovered a simple single-celled amoeba that can help understand the function of human proteins in causing Alzheimer's disease. This discovery allows for animal-free testing, paving the way for potential improved treatments for the degenerative disease.
A team of researchers discovered that large multicellular organisms grew tall to access nutrient-rich ocean flow, gaining an advantage over bacteria. This discovery sheds light on the evolution of early life forms and may have implications for understanding modern ocean processes.
Researchers found that males' ability to monopolize a female drives the evolution of their sexual traits. Some species invest more in weapons, while others prioritize large testes for fertility. The study looked at over 300 species and revealed surprising variations in male investment.
A new CU-Boulder study analyzed over 1,000 scientific studies on North American mammal responses to human-caused climate change, finding that only 52% of species responded as expected. Large mammal body size and restricted times during a day were key traits tied to climate change responses.
Researchers found that some polar bears in the western Hudson Bay population are using flexible foraging strategies, such as prey-switching and eating plants and animals. This behavior may help them survive in a rapidly changing environment where sea ice is melting earlier and freezing later.
A study found that yellow-breasted chat males visit multiple territories at night to search for partners during their fertile period, increasing reproductive success. The researchers used radio transmitters and triangulation software to track the birds' movements, revealing a previously unknown behavior in diurnal species.
Researchers developed a new paradigm to analyze collective animal behavior using machine learning without tracking individual animals, mirroring human observation. The technique successfully distinguished between species and changes in behavior in response to stimuli.
A new study found that queen pheromones in wasps, ants, and some bees have a strikingly similar chemical structure, despite millions of years of evolution. The researchers suggest that these signals evolved from conserved cues used by solitary ancestors.
Rats will help a stranger in distress if they have had prior positive social interactions with the type of unfamiliar individual. This behavior is driven by social experiences and not genetics or kin selection. Rats are able to categorize others into groups and modify their social behavior accordingly.
Researchers at the University of Cincinnati identified serine/threonine protein kinase-29 (STK-29) as a key component linking circadian rhythms and cell division cycles. The study, led by Christian Hong, provided insights that could lead to improved disease treatments and drug delivery.
A study by the University of Bristol's Modelling Animal Decisions team found that optimal choices can violate transitivity, suggesting that seemingly irrelevant alternatives can influence decisions. This challenges traditional assumptions about rationality and decision-making.
Research reveals microbes participate in complex networks of trade, swapping nutrients and resources using human-like strategies. Microbes cooperate with humans and plants, sharing economic strategies to thrive.
Scientists at Queen's University Belfast and the Irish Equine Centre are developing a new animal doping test that detects known biological effects of banned substances. The test has the potential to revolutionize animal drug testing by enabling quick and efficient screening of large numbers of animals.
Researchers found identical pigment compositions between hunter-gatherer and farmer styles, challenging previous theories. The artists used iron oxides and terrigenous materials easily found in their environment.
A study published in the Proceedings of the National Academy of Sciences found that primates, including humans, expend only half the daily energy needed by other mammals. This slow metabolism accounts for their prolonged childhoods, infrequent reproduction, and extended lifespans.
Researchers at UC Riverside have discovered how the common fruit fly detects sweet compounds, revealing a new understanding of taste receptors in insects. The study's findings hold promise for developing strategies to block these receptors, potentially helping to control disease-carrying mosquitoes and other pests.
Researchers at Massachusetts General Hospital have developed a procedure to induce immune tolerance to hand and face transplants, which could free recipients from lifelong immunosuppression. The study successfully tested this approach in miniature swine, paving the way for expanded availability of these complex transplants.
Researchers discovered a mutation in the TMEM95 gene causes idiopathic male subfertility in cattle. The study found that genetic defects can be traced back to one Fleckvieh animal born in 1966, which also highlights potential human medicine applications.
A team of researchers found that island lizards exhibit reduced escape behavior compared to mainland lizards, suggesting a link between island isolation and tameness. The study also revealed that prey size is an important factor in determining escape behavior, with smaller prey having shorter flight initiation distances.
Researchers have discovered seven new species of nearctic wasps from the Charipinae subfamily, characterized by their small size and shiny bodies. The newly described species are detailed in a recent article published in Annals of the Entomological Society of America.
Scientists at the University of Liverpool have developed a cheaper and more reliable alternative to animal testing, involving miniscule protozoa. The test showed significant variations in population growth according to mascara brand, with some killing the protozoa and others not harming them at all.
A recent study found that guide dogs experience the most tension on their chest when wearing a harness, with pressure equivalent to up to 10% of their weight. Flexible harnesses are recommended to minimize stress and promote healthy exercise for guide dogs.
The study found that DNA barcoding increases the accuracy of monitoring marine mammal biodiversity, allowing for earlier detection of impacts from climate change and human activities. By using DNA barcoding in conjunction with a stranding network, researchers can better track species distribution and abundance.
Research by Thanh-Lan Gluckman reveals that plumage patterning is labile in both males and females, with changes driven by environmental factors and signalling functions. The study challenges traditional views on sexual dimorphism, suggesting multiple types of dimorphism and adaptations to social and environmental conditions.
The California Academy of Sciences discovered 91 new plant and animal species in 2013, including 38 ants, 12 fishes, and 14 plants. This finds highlights the importance of biodiversity hotspots like Madagascar and the need for continued exploration and conservation efforts.
A study led by University of Manchester researcher Charlotte Brassey found that the leg bones of the tallest moa birds were similar to those of modern flightless birds that can run fast. The researchers used Finite Element Analysis (FEA) to estimate the weight and robustness of the moa, finding that different species had unique solutio...