Articles tagged with Animal Physiology
Researchers at the University of Tokyo discovered that two tree snail species can alter their shell colors and patterns in response to humidity, using a process called refractive index matching. This unique mechanism has potential applications for smart sensors and materials.
A new study has found that changes in a senior dog's gait can be an early warning sign of dementia. The research tracked the stride length of 88 geriatric dogs over time, revealing a significant decrease in front leg stride length with worsening cognitive decline. This change was found to be more pronounced than age-related decline alone.
Research reveals that zebra finch chicks' brain development is altered by heat warning calls in the egg, preparing them for hot conditions after hatching. The changes involve genes involved in blood vessel structure and muscle contraction, potentially protecting the chicks from heat stroke.
A new study reveals that a change in diet may have paved the way for the evolution of spectacular displays in manakins. The research found that genetic fingerprints of strong sexual selection and changes in taste and digestion linked to a fruit-based diet drove the emergence of elaborate mating behaviors.
Researchers tracked 68 Hawaiʻi false killer whales using drone photogrammetry, finding extreme physiological shifts and a record low Body Condition Index. The population's decline coincides with rising ocean temperatures, highlighting the need for conservation efforts to ensure the species' long-term survival.
A new study from Stockholm University found that young guppies raised with visual contact to live fish developed larger brains and relatively larger olfactory bulbs compared to those with only screen-based exposure. This suggests that interactive social experiences during development may be important for normal brain growth.
Researchers have discovered a new, previously unknown biofluorescent trait in the fire salamander, which may facilitate communication among individuals and influence mating behavior. The phenomenon is thought to be linked to toxic secretions on the animal's skin.
A new fossil species, Plumadraco, has been found with the longest tail feathers ever recorded on a fossil bird. The analysis suggests that the bird's tail feathers were used for attracting mates, and the color of the feathers was probably dark brown or black.
A newly-discovered blue octopus from the Galapagos Islands has been identified as Microeledone galapagensis, and its unique features were revealed through micro CT scans. The species is the first new octopus species led by curator emerita Janet Voight in her four-decade career.
Researchers studied how hibernation affects the visual brain of squirrels, finding that certain neurons undergo quick structural changes during deep sleep and arousal stages. These changes reverse within hours after waking and have no lasting effects on neuron structure six months after hibernation.
Researchers found that amphibian metamorphosis entails a direct cost, including weight loss and reduced energy intake, which varies by sex. The study uses the palmate newt as a model to shed light on the evolutionary mechanisms governing the persistence or loss of metamorphosis, particularly in the context of climate change.
A new study found that fur seals' heart rate peaks six to eight hours after returning to land, indicating a delayed recovery from the physiological costs of foraging at sea. This suggests that seals use their time onshore to actively recover and replenish oxygen stores.
Researchers have mapped the first migratory bird brain using high-resolution light microscopy and open-source software tools, creating a valuable resource for neuroscience worldwide. The new Eurasian blackcap atlas enables consistency in brain data interpretation and fosters collaboration among researchers.
Anglerfish species use lures for both attracting prey and signaling potential mates, with bioluminescent lures appearing around 34-23 million years ago. Researchers analyzed over 100 species to study the evolutionary history of lures, tracing changes from motion-based to glowing lures.
Cats gradually reduce food intake when same food is repeatedly presented, but this effect is mitigated by introducing a different food or odor, suggesting sensory novelty plays a key role in regulating feeding behavior.
A study by Florida Atlantic University researchers has uncovered the impact of stress on wild songbirds, finding that even mild challenges can alter the gut microbiome, leading to changes in health indicators such as beak color and stress hormone levels.
Researchers engineered a 3D-printed robotic rattlesnake to test how 38 zoo animals responded to rattling behavior. The study found that the rattling display functions as an effective deterrent, with species sharing natural geographic range with rattlesnakes exhibiting stronger fear responses.
Researchers discovered a simple strategy for snakes to stand upright without limbs, concentrating bending and muscle activity into a short boundary layer near their base. This approach reduces energy required while maintaining balance, offering design principles for soft robots and medical devices.
A new study published in Nature Communications uses larval zebrafish to uncover the neural mechanisms behind visual integration and decision-making. The findings suggest that the brain uses an additive algorithm to combine sensory inputs from motion, light, and luminance changes, guiding rapid adaptive decisions.
A new study reveals that animal species with fast-paced ecologies have faster visual perception, tracking prey in mid-air versus grazing slowly across the seabed. This finding supports Autrum's hypothesis and highlights how ecology shapes the tempo of perception across life on Earth.
A University of California - Riverside study has identified bed bugs' fear of water and wet surfaces, which affects their behavior and movement patterns. Researchers found that all bed bug ages and genders avoid wet surfaces, with younger insects being more sensitive to moisture.
A study from the University of Cambridge identified twelve dog breeds at risk of Brachycephalic Obstructive Airway Syndrome, a condition causing serious breathing problems. The breeds include Pekingese, Shih Tzu, and Staffordshire Bull Terrier, with narrow nostrils and short head shapes being significant risk factors.
A study found that dogs experience changes in balance when hearing angry or happy human voices. Angry voices were most strongly associated with destabilization, while happy voices led to both stabilization and destabilization in some cases. The research suggests that emotional arousal may play a role in the dogs' responses.
Researchers at University of Queensland conducted hearing tests across ocean off Australian coast, finding humpbacks react to higher frequency sounds than expected. The study provides direct evidence humpbacks are highly sensitive to higher frequencies at the upper end of human hearing range.
Bird retinas operate under chronic oxygen deprivation, relying on anaerobic energy production. The pecten oculi serves as a metabolic gateway, delivering sugar and removing waste products.
Research found that extreme summer heat can overwhelm honey bees' cooling systems, causing significant colony population declines. Larger colonies with more stable internal temperatures were less affected, highlighting the need for effective management strategies to mitigate impacts of high temperatures and maintain colony stability.
Research shows that ants with less protective armor, such as cuticle investment, tend to have larger colony sizes and are more successful in terms of diversification rates. This suggests that complex societies like humans may evolve by sacrificing individual quality for collective power.
Researchers found that the skin relies on TRPM8 sensor for cold detection, while internal organs primarily use TRPA1 sensor. This difference explains variations in external and internal cold perception, and has implications for understanding thermal homeostasis and pathologies related to cold sensitivity.
A new study found that the density and distribution of Earth's largest land animals are limited by sodium availability in their local flora. In many areas, wild herbivores cannot get enough salt in their diet, leading to interesting behaviors such as elephants consuming sodium-rich rocks and gorillas fighting for salty foods.
A non-invasive method has been developed to monitor hormone levels in frogs, providing valuable insights into their wellbeing. This technology uses tiny patches that collect hormone-rich secretions from frog skin, marking a major step forward in amphibian monitoring.
A study by the University of Helsinki reveals that microplastics interact with the rumen microbiome, alter fermentation processes, and are partially broken down. This interaction has significant implications for animal health, productivity, and food safety.
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.
The white oval squid employs a range of survival strategies, including color matching, disruptive patterns, and synchronized schooling. By analyzing the mathematical patterns behind their behavior, researchers have confirmed the effectiveness of these strategies in evading predators and camouflaging in diverse environments.
Researchers discovered that Clubiona spiders have unique antifreeze proteins that bind to ice crystals, preventing their growth at sub-zero temperatures. This adaptation is crucial for perennial agriculture as it could lead to reduced reliance on insecticides and combatting resistance.
Simple items like hay feeders and giant rubber activity balls can improve horse behavior and reduce health issues such as ulcers and fragile leg bones. Researchers found that stabled horses displayed increased movement and reduced frustration behaviors when provided with enrichment tools.
A meta-analysis of scientific literature reveals that pathogens are the primary driver of mass mortality events in sea urchins, with 33% of events attributed to them. Storms and extreme temperatures also play a significant role, with 25% and 24% of events respectively.
A University of Houston biologist has received a $2.16 million federal grant to study how some coastal frogs survive in salty environments. The research could reveal how cells cope with salt stress and have implications for understanding the health risks of high-salt diets in humans.
A team of researchers led by Stephen McCormick has uncovered how fish know when to migrate, revealing that their pituitary gland is studded with photoreceptors that can perceive daylight changes. This discovery sheds light on the enduring migration mystery and will help in planning for climate change's impact on migrating fish populati...
Researchers have confirmed that six North American bat species emit a greenish light when exposed to UV rays, suggesting it may be an inherited trait used for communication. The study's findings could provide valuable insights into how bats adapt in the past and to future environmental changes.
Researchers discovered that bats in full sun bat boxes can warm to temperatures exceeding 50°C while sleeping, leading to dehydration and death. Providing bats with a choice of roosts in the same location, some constructed for stable temperature and others for quick cooling or warming, could help prevent this risk.
A new study found that sniffer dogs' performance in real-world scenarios is highly variable and dependent on factors like region, day, and explosive type. The research suggests that limited access to explosive training materials is a primary challenge for teams, highlighting the need for wider access to improve detection performance
Researchers discovered that three-legged lizards can survive by adapting their gait and using abundant food sources, highlighting the limitations of Darwin's natural selection theory. The study found less than 1% of wild lizards have a limb deficit, with nearly half being Caribbean anoles.
Scientists have discovered that gray tree frogs prepare for winter by responding to shorter days rather than colder temperatures, allocating energy resources unnecessarily. This 'ecological trap' could affect critical behaviors like breeding cycles and migration patterns in species adapted to seasonal cues.
Researchers found that seabirds use different strategies to find food, with scent-tracking birds benefiting visually hunting birds. This study provides insights into complex systems and crowd behavior, informing conservation strategies for procellariiform seabirds.
A new study at Bournemouth University found that people with horse experience were more accurate at recognizing pain in horse faces, while those with social anxiety were better at detecting pain in human faces. The findings aim to improve animal welfare by helping owners recognize changes indicating pain in horses.
A recent study suggests that teddy bears play a crucial role in shaping our early conception of nature. By analyzing morphometric and colorimetric data, researchers found that traditional teddy bears diverge significantly from their real-world counterparts. This gap may lead to warped or incomplete mental representations of animals and...
A new study analyzing the dietary choices of wild woodrats reveals that individual diets may not be as diverse as previously assumed. The research suggests that the costs of specializing on one food source or diversifying one's diet have a strong impact on an animal's ability to survive and thrive.
A new study finds that sargassum seaweed can significantly slow down sea turtle hatchlings in Florida, increasing their risk of predation and heat exposure. Researchers found that even small amounts of sargassum can impede hatchlings' progress, with leatherbacks taking 54% longer to crawl through light sargassum.
A study found that most rodents have thumbnails instead of claws, which helps explain how they thrived in various environments. This discovery suggests that thumbnails provide more manual dexterity than long, sharp claws, enabling rodents to exploit high-energy resources like nuts.
A new study reveals that humans, dogs, and pigs share similar brain responses to vocal sounds and calls from their own species, indicating an evolutionarily ancient mammalian heritage. This discovery sheds light on the deep roots of voice perception and highlights the value of studying companion animals to better understand human biology.
A research team has discovered that bees' complex eyes contain specialized facets that detect polarized light in the sky, producing a less-detailed but more accurate image. This allows bees to tune out unimportant information and focus on the big picture, using the sun's position as a compass.
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 found that orangutans outshine humans in avoiding obesity by adjusting their nutrient intake, behavior, and energy use. The study provides insights into the evolutionary adaptations of great apes, which can inform better nutritional practices for humans.
Researchers found that brown anole lizards can withstand extreme lead levels without impairment. Transcriptomic analyses revealed minor effects on brain and liver tissue, with altered genes linked to metal ion regulation.
Researchers have established apple snails as a system to study eye regeneration, which may hold the key for restoring vision due to damage and disease. The team discovered that the snail eye is anatomically similar to humans and can regrow itself, with genes such as pax6 playing a crucial role in development.
Scientists have developed a method to extract insect heart rates from video footage taken with digital cameras, preserving their natural behavior. The technique uses advanced signal processing and machine learning algorithms to analyze subtle body movements and detect accurate cardiac activity.
Researchers found that live well temperatures fluctuate drastically during tournaments, causing physiological stress and longer recovery times for largemouth bass. This study highlights the importance of optimizing live well conditions to minimize mortality rates and ensure sustainable fisheries.
A recent study reveals that heat stress directly alters fat metabolism in adipose tissue, regulating genes that promote fat storage. Researchers identified 459 genes that showed different expression levels in response to heat stress, highlighting the active role of adipose tissue in fat deposition.
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.