Articles tagged with Animal Science
Scientists found that orangutans confined to resource-limited areas of Borneo had smaller brains than those living in more abundant Sumatra. The study suggests an evolutionary connection between food availability and brain size in primates.
A team of scientists reconstructed the early evolution of fungi, finding that ancestors may have lost flagellae and adapted to life on land in multiple instances. Fungi are believed to be animals' closest relatives and play a crucial role as decomposers in ecosystems.
Fossilized embryos from 550 million-year-old Doushantuo Formation in China show early animals had adopted some structures and processes seen in modern embryos. The discovery reveals primitive animals could divide cells asynchronously, forming unique shapes.
Researchers at Harvard University found that the dynamic elastic and dampening roles of ankles, feet, and other distal extremities help legged animals maintain stability on uneven terrain after stumbling. By modulating limbs dynamically, selectively, and quickly, animals can recover from falls and maintain forward momentum.
Researchers at the University of Texas at Austin and the University of Bath discovered that Accutane, a common acne treatment, can induce depression-like behavior in mice. The study found that mice treated with the drug spent more time motionless and exhibited reduced escape-related behavior compared to untreated animals.
Biologists at UCSD discovered red and yellow monkeyflowers have distinct pollinators, with hummingbirds preferred for the red form and hawkmoths for the yellow. The shift in flower color is likely due to natural selection by these different pollinators.
Researchers found that bluegill sunfish larvae preferentially associate with the odor of siblings they've never encountered before. This ability provides compelling evidence for the use of kin recognition through a process in which individuals match their own physical characteristics to those of others.
Researchers analyzed branching morphogenesis in lung, kidney and mammary glands, shedding light on organ development and implications for human health. The study's findings have significant implications for genetic manipulation and virtual reconstruction of organogenesis.
Researchers found that conservation measures appear feasible in gap locations with large tracts of habitat and sparse human populations. However, difficulties may arise near coasts and in regions with agricultural interests, highlighting the need for further efforts to establish new protected areas.
Researchers have identified a genetic defect causing some people to feel full despite eating, providing hope for new anti-obesity treatments. The study pinpointed the melanocortin-4 receptor's role in regulating hunger and found potential therapeutic compounds.
Researchers have found that velvet worms, ancient creatures thought to be similar to ancestors of modern arthropods, share brain structures more closely related to those of spiders and scorpions than initially thought. This discovery sheds new light on the evolutionary origin of these fascinating animals.
A study by Craig McClain and colleagues found that marine snails in deep sea areas tend to be smaller than their shallow-water relatives, while those less than 12mm long become larger. This suggests a compromise between different selection pressures.
The Ocean Tracking Network, a global collaboration of scientists and experts, aims to track the movements of important species using electronic tags. The network will use an extensive international array of acoustic receivers on the ocean floor to collect data on water temperatures, salinity, and light conditions encountered by animals.
A comprehensive theory explains Madagascar's high levels of plant and animal endemism, relating it to watershed configurations and recent climatic shifts. The research provides a clear framework for testing evolutionary relationships and understanding the island's unique biodiversity.
Fire ant expert Walter R. Tschinkel's new book reveals the fascinating world of S. invicta, dispelling misconceptions and showcasing the creature's vital role in ecosystems. The fire ant thrives in disturbed habitats, controlling pest populations and adapting to human activities.
A study on side-blotched lizards found that cooperating males pass on their genes through a trait known as the 'greenbeard,' despite personal costs. The researchers identified three throat colors and behaviors that follow 'rock-paper-scissors' cycles, showcasing how cooperation can be beneficial in evolutionary terms.
Researchers at the University of Wisconsin-Madison reveal how evolution occurs at a fine level of detail, explaining molecular mechanisms behind animal adaptations. They show how fruit fly wing spots, which are driven by female preferences, can be gained and lost independently in different species.,
Researchers found a genetic switch controlling animal development and cancer growth, involving protein PTEN. The discovery provides insight into cancer progression and suggests additional genes may be involved.
Researchers found that worms dwelling at ocean depths of 2,200 meters prefer temperatures around 50 degrees Celsius, outperforming other species. This adaptation allows them to graze on bacterial lawns that no other organism can access, with some species succumbing to heat quickly.
The newly found Tiktaalik species blurs the boundary between fish and land-living animals through its anatomy and lifestyle. The discovery provides critical early phase insights into the evolution of all limbed animals, including humans.
Researchers discovered that hagfish can regulate their acid-base balance and have a greater capacity for rapid pH compensation than any other fish studied. The hagfish's ability to maintain a stable body temperature and salt concentration in its blood enables it to cope with high levels of CO2.
Researchers at the University of Toronto found that male Australian redback spiders develop faster in areas with high female populations, allowing them to find mates before other males. This adaptation enables them to optimize their reproductive success despite intense competition for limited mating opportunities.
A team of scientists led by Rudolf Raff discovered that certain conditions, such as the presence of hydrogen sulfide, can facilitate the fossilization of early animal embryos. The findings suggest that fossils from 500 million years ago may be embryos encased in a fertilization envelope and fossilized under highly reducing conditions.
A UCR-led study identifies RNA silencing as a key innate immunity mechanism protecting fruit flies from viral infections. The research reveals the molecular basis of this antiviral response and suggests potential implications for understanding human antiviral defenses.
Scientists developed research mice with ABCA1 gene mutations to study good cholesterol formation in the liver and intestines. They found that the liver produces 70-80% of HDL, while the intestines produce 20-30%, shedding new light on heart disease prevention.
A new global evolutionary map has been created using DNA sequences of complete genomes, revealing key details about the origin of species and early evolution. The improved tree has also shed light on microbial diversity in unexplored environments.
The use of animal serum-free media for growing live cells is being promoted as a more humane and scientifically superior alternative. This approach eliminates the need for fetal calf serum, reducing variables in experiments and ensuring reproducibility across laboratories.
Despite losing some predators, anti-predator behavior can persist due to co-adapted suites with multiple predators. Studies of wallabies show that retention of anti-predator behavior is possible even after isolation from all predators.
miR-278 plays a crucial role in regulating insulin sensitivity in flies, with reduced insulin sensitivity and elevated blood glucose levels observed in flies lacking this microRNA. The study highlights the importance of microRNAs in metabolic regulation.
A team of scientists from the University of Wisconsin-Madison reports a breakthrough in making human collagen in the lab, opening doors for medical applications and nanotechnology. The new discovery enables the creation of synthetic collagen that can be tailored for specific uses, including wound healing and implantable sensors.
Scientists discovered that Antarctic krill 'parachute' several times during the night, injecting more carbon into the deep sea than previously understood. Krill feed on phytoplankton at night and excrete waste at depth, making them a key player in removing carbon from the atmosphere.
A study published by University of California, San Diego researchers suggests that climate change may be a key factor in the evolution of larger body size in certain animal species. The study found that deep-sea ostracodes increased in size as global ocean temperatures cooled over 40 million years.
A unified physics theory explains how animals move by minimizing imperfections in their flows. The constructal law predicts relationships between body mass and speed, stride frequency, and muscle force, showing convergences across different species and environments.
A new study suggests that the animal family tree looks fuzzy because early evolution occurred in clusters, making it difficult to reconstruct relationships. Scientists used DNA data to try to generate a clear picture of the tree, but instead found a bush with many branches sprouting close together.
The study highlights the limitations of using surrogate animals to predict endangered species decline, arguing that target species are more relevant. The authors advocate directly examining the target species before resorting to substitute animals.
Researchers at the University of Florida have developed a DNA identification tool that can accurately identify species from animal tissue samples, with an error rate as low as 4%. The study uses a comprehensive catalog of species and analyzes tissue samples from marine organisms to quantify its effectiveness.
A study on the Platynereis genome reveals that early animals had complex human-like genes, contradicting previous assumptions. The discovery sheds new light on human evolution and highlights the importance of preserving ancient genetic features.
A team led by Carnegie Mellon University scientist C. Giovanni Galán has found evidence of a living memory trace in honeybees, which lasts several minutes after initial exposure to an odor. The discovery supports Hebb's theory of learning and could provide new insights into how short-term memory works.
A $2.25 million NSF grant will enhance MorphBank, a morphology database, to facilitate international collaboration and improve image retrieval with advanced search techniques. The system aims to change scientist habits by providing a platform for depositing images, commenting on research results, and accessing relevant information.
A conservation biologist has been awarded a $500,000 MacArthur Fellowship to study and protect endangered plants and animals in Madagascar. The award recognizes the individual's exceptional originality and dedication to their creative pursuits in the field of conservation.
Researchers at UCSD advocate for standardized, humane guidelines for studying captive great apes, emphasizing the need for specialized care and data management. They propose a national network of facilities to support this effort, which could contribute to the survival of great ape species.
German and Malagasy primatologists have discovered two new lemur species, Mirza zaza and Microcebus lehilahytsara, highlighting biodiversity patterns among humans' closest relatives. The discoveries shed light on human origins and evolution, with lemurs being crucial to understanding ancient primate lineages.
The discovery of a 190 million-year-old Massospondylus embryo provides a rare glimpse into the life of an early dinosaur. The delicate bones of most dinosaur embryos were destroyed over time, but this well-preserved skeleton offers detailed anatomy insights into the earliest known dinosaur embryo.
Researchers found that wild-caught mountain chickadees differ from previous species tested by consistently ignoring angular features of their environment and following landmarks. This discovery suggests that animals may be predisposed to navigate by geometry, contradicting prior research.
Researchers at European Molecular Biology Laboratory discovered that actin fibres are necessary to help microtubules transport chromosomes during cell division. In a study using starfish oocytes, the team found that actin networks gather chromosomes together before they can be pulled by microtubules.
The coelacanth genome provides insights into its evolutionary relationships with other animals, particularly in embryonic development and immunity. The study sheds light on how the species' genes differ from those of other fishes and tetrapods.
Researchers found that chickadees produce two distinct alarm signals, warning of predator size and threat level. The birds assess risk based on body size, with larger raptors posing greater danger.
Researchers studied flying snakes' flight patterns and found that body length and wave amplitude are key predictors of flight behavior. Paradise tree snakes can travel further horizontally than vertically, making them true gliders.
Scientists from TIGR and universities uncover genetic instructions for patellamide production, allowing lab synthesis using E. coli. The discovery solves a decades-long mystery about Prochloron's role in producing these potentially important biochemicals.
Researchers have identified a biological pathway for a potent molecule, IL-10, that can delay rejection of transplanted organs by preventing blood-vessel deterioration. The study used rat models and found that a single muscular injection of IL-10 could provide long-term therapeutic effects.
Researchers at JLab and College of W&M studied radiation blockers to enhance nuclear imaging accuracy. They found that higher doses of potassium iodide blocked radioactive iodine uptake better in mice. The study uses a unique medical imaging system and precise detectors, providing insights into the body's metabolism and thyroid function.
Researchers used nuclear imaging to study how mice absorb radioactive iodine, finding that a dose five times higher than the FDA-recommended dosage is needed for effective protection. The team discovered that using this higher dose can improve image quality and reduce false-positive readings.
Researchers found a significant decline in female water voles at a Norfolk site, with radio-collars potentially linked to the change. The study suggests that local resource competition may drive sex-ratio shifts in stressed females.
A study found that women with primary hypothyroidism had a 61% lower risk of developing invasive breast cancer. Women with breast cancer were also less likely to have hypothyroidism compared to healthy women, and those with the condition were diagnosed with earlier stage disease.
Scientists prevented brain damage by producing therapeutic levels of GDNF, a protein that helps nourish brain cells, in small monkeys. The gene therapy approach aims to halt Parkinson's disease at its onset and treat devastating side effects.
The Laupala cricket's unique courtship songs play a crucial role in its rapid speciation, resulting in the formation of new species. This phenomenon sheds light on the role of individual choices in shaping species evolution and biodiversity.
Researchers found that male Cassin's finches sing more in response to the loss of a prospective mate, but less when females are present or infertile. The scientists conclude that males temper their efforts based on the likelihood of a payoff.
A team of Wisconsin scientists discovered molecular switches that govern the development and evolution of form in animals. The study found that genetic changes to these switches can produce diverse patterns and features, such as spots on fruit fly wings or stripes on zebras, which confer advantages for survival and reproductive success.
Azevedo's research reveals surprisingly simple cell lineages in small invertebrates, contradicting long-held assumptions about developmental complexity. The findings suggest a more universal approach to analyzing organism development using computer programs.
The Arunachal macaque is a new species of macaque found in India's Northeast, with its name meaning 'deep-forest monkey' in local vernacular. Further studies will determine if it should be included on the IUCN Red List and protected under Indian law.