Articles tagged with Animal Science
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.
Researchers trained European starlings to choose between rich food sources and decoys, finding that 'irrational' preferences resulted from energetic state rather than cognitive mechanisms. The study warns against introducing confounding effects in nonbiological framework testing ideas.
Researchers found that wasps with broken-up facial patterns signal their quality and status. Those who don't signal honestly receive social sanctions, including harassment from dominant wasps. The study provides conclusive evidence that dishonest visual signals have a social cost in the wasp world.
Scientists from VIB are using RNAi technology to study the function of genes in Arabidopsis thaliana, a model plant with 29,000 genes. The goal is to identify the function of all genes, which will shed light on biological processes in plants and humans.
Joan Somers' research found that cows on straw yards had significantly healthier claws and better walking patterns than those on concrete floors. The study highlighted the importance of comfortable bedding spaces, dry stalls, balanced rations, and regular claw care in improving dairy cow welfare.
A wolverine with a GPS collar traveled 543 miles over 42 days, crossing three states and multiple national parks. The study's findings suggest that wolverine populations may function over a vast geographic scale, highlighting the need for habitat conservation and cooperation among agencies and landowners.
Researchers from University of California, Berkeley, and other institutions will study the mechanical and neurological basis of locomotion using RHex, a short six-legged robot. The team aims to uncover the neural and muscular control and feedback loops that lead to similar patterns of movement in animals
Researchers found that two prokaryotes merged to form the first eukaryote, creating a 'ring of life' that has significant implications for all multicellular forms of life. The study sheds light on the origins of eukaryotes and their genetic background.
Scientists analyzed mating behavior and body size of over 100 shorebird species to explain Rensch's rule. Larger shorebirds show competitive battles on the ground, where bigger males have an advantage, while smaller species feature aerial battles where agility is key.
A team of researchers will use advanced imaging systems to study deep-sea animals, behaviors, and phenomena in the Gulf of Mexico. The expedition aims to discover new life forms and understand the unique uses of light in the dark deep sea.
A study published in Vision Research found that the size of animals' eyes is linked to their body weight, with larger animals having bigger eyes on average. However, when broken down into smaller groups, such as birds and primates, eye size becomes more complicated and varies greatly.
A team of Japanese researchers has developed a novel method for introducing transgenes into animals by injecting retroviruses into immature male mouse testes. The technique resulted in high fertility rates and stable transgene transmission, enabling the production of genetically modified offspring from a single founder male.
Researchers discovered that bacteria have acquired a gene from animal immune systems, allowing them to evade host defenses. This finding has significant implications for vaccine development and our understanding of bacterial evolution.
A research team at the University of North Carolina at Chapel Hill has found evidence that sea turtles can read geographic position from subtle variations in the Earth's magnetic field. Older turtles use this ability to pinpoint their location relative to specific target areas, effectively having a biological equivalent of GPS.
Researchers recorded mantis shrimp's club-shaped front leg striking prey at peak speeds of 23 meters per second, generating forces over 100 times the shrimp's body weight. The unique saddle-shaped structure acts as a spring, storing energy until release propels the strike.
Researchers created a model linking tiger populations to prey density, revealing that human hunters are primary drivers of wild tigers' decline. The study spans eight years and 4,200 miles, providing rigorous insights into the macro-ecological dynamics of tigers and their habitats.
Researchers investigated how small mammals use crossing structures built across the Trans-Canada Highway, finding that small covered culverts offer protection from other animals and are a cost-effective mitigation strategy. The study's findings have already influenced road construction plans, highlighting the importance of conservation...
Researchers found an irregularly shaped cluster of nerve cells in the hypothalamus of the sheep brain associated with female mate preference. The study provides clues to the processes involved in development and regulation of heterosexual and homosexual behavior.
Purdue scientists Rick Howard and colleagues discovered that genetically modified fish have a reproductive advantage, but their offspring are less likely to survive. This paradox could lead to a population dwindling in size and potentially disappearing entirely if not managed carefully.
Evo-devo biologists led by Raff will use mechanistic tools to address major historical questions about multicellular animals, the Cambrian radiation, and animal larvae. The approach may reveal complex features in animal development evolved more quickly than expected.
Researchers at Carnegie Mellon University have developed a new coating method for Quantum Dot Corp.'s quantum dots, enabling them to circulate in the body for up to eight months. This allows for non-invasive imaging of structures in living mice and potential applications in cancer diagnosis and treatment.
A team of scientists from the University of Wisconsin-Madison has made a breakthrough in resolving the evolutionary tree using new genomic-scale data. By analyzing eight yeast species, they found that combining more than 100 genes provides an unprecedented level of resolution, overcoming previous limitations.
Researchers developed a systematic approach to inhibit 1,000 Drosophila genes and observed changes in cell morphology. By clustering genes by their effects, they assigned functions to 50 previously uncharacterized genes, shedding light on cellular processes.
Research suggests that social structures in insects like bees and ants emerge from group interactions, with patterns of behavior creating complexity. This idea challenges the conventional view that social characteristics are programmed by genes, proposing instead that adaptation follows the development of networks.