Articles tagged with Mammals
Researchers successfully implemented a headstarting method to protect juvenile bridled nailtail wallabies from feral cats, resulting in an 89% survival rate. The technique involves fencing off areas to raise young animals until they are large enough to be released back into the wild, demonstrating its effectiveness as a cost-effective ...
A new study suggests that it was not dinosaurs but other mammals that competed with modern mammals before and after the mass extinction of dinosaurs. The research identifies the evolutionary limits placed on different groups of mammals, revealing a more complex story of competition between distinct mammal groups.
A study reveals that Paleocene mammals had stockier builds and more mobile joints than expected, indicating they adapted quickly to survive and thrive. Their anatomy suggests a key role for ground-dwelling lifestyles in their success.
Researchers found that kiwi populations differ genetically between areas, but lack understanding of local adaptations and breeding changes. The study emphasizes the importance of strategic sample regimes and informative markers for developing effective conservation policies.
Researchers used deep-time approach to compare communities defined by species vs ecological roles, finding that ecosystems are more resistant to change than species compositions. They also found that preserving ecosystem functioning can help stabilize ecosystems in the face of disturbances.
Scientists discovered six sex chromosomes in the Odorrana swinhoana frog species, revealing insights into how complex XY systems evolve. The finding suggests that translocation, a chromosomal abnormality, may have occurred by chance or been non-randomly selected.
A new scientific review has found significant gaps in knowledge about how mammal populations respond to climate change, particularly in sensitive regions. The study highlights the need for more holistic approaches to understanding climate change impacts on animal populations.
A new mechanical model simulates how whiskers bend within follicles in response to external forces, shedding light on the process of sensing touch signals. The model suggests an 'S' shaped deformation and predicts how whiskers interact with mechanoreceptors, influencing tactile sensitivity.
A global summary of species functions revealed that more than half of species perform less than 20% of the group's functions, with only a few species performing unique roles. This study highlights the importance of conserving functionally unique species to maintain ecosystem services and human well-being.
A team of biologists found that human pelvis sex differences are similar to those in chimpanzees, suggesting an ancient origin. The magnitude of these differences is only half as large in chimpanzees, indicating that modern humans inherited this pattern from earlier mammals.
A team of researchers overturns the long-standing hypothesis that mammal ancestors moved like modern lizards. They discovered that non-mammalian synapsids moved their backbone in a manner distinctly different from any living animal.
A new Harvard-led study challenges the classic lateral-to-sagittal shift in mammal spine evolution, suggesting a completely different type of backbone function. The research found that nonmammalian synapsids had unique spinal characteristics not seen in modern reptiles or mammals.
A new study has revealed that alligator hearts are able to maintain a normal rhythm despite extreme temperature changes, unlike mammals which can fibrillate under stress. This unique adaptation comes at the cost of reduced maximum heart rate and increased vulnerability to cardiac arrhythmia.
Domestic cats hunt less when owners feed them high-meat-content food and engage in play mimicking hunting. This reduces predation by 25%, with a 36% decrease seen in prey animals brought home to cat owners.
A study models bird and mammal species distributions under climate scenarios, revealing potential conservation issues across national borders. The authors project that border barriers could obstruct the dispersal of nonflying species as their ranges shift, emphasizing the need to mitigate these impacts.
A global study led by UCC researcher Samantha Ball found 'runway roadkill' increasing by up to 68% annually, costing aviation authorities millions per annum. The study identified 47 countries with reported mammal strikes, including bats, rabbits, and coyotes, highlighting the need for effective Wildlife Hazard Management Plans.
A new study finds that small mammals in the Mojave Desert are more resilient to climate change than birds, due to their ability to escape the sun in underground burrows. This difference is likely due to their lower cooling costs and tendency to be active at night.
A new study reveals that despite living in the same Mojave Desert location, mammal and bird communities experience different exposures to climate warming. Small mammals have remained relatively stable, while bird occupancy and species richness have declined dramatically due to their limited ability to mitigate rising temperatures.
The study found that bats accounted for the greatest proportion of strikes in Australia, while rabbits and dog-like carnivores dominated Canada, Germany, and the UK. Average mammal strikes per year ranged from 1.2 to 38.7 across countries, with estimated annual costs exceeding $100 million.
A new analysis suggests that north-south differences in ticks' host choice, density, and host-seeking behaviors contribute to Lyme disease's prevalence. Southern ticks tend to select lizards as hosts, reducing the spread of Lyme disease-causing bacteria.
A comprehensive analysis of land mammal composition across mapped Indigenous lands reveals that 2,175 mammal species have at least 10% of their ranges within these lands. The study highlights the importance of Indigenous peoples' lands for biodiversity and ecosystem services, with 413 threatened species occurring in these areas.
The genomes of platypus and echidna have been published in Nature, providing a valuable resource for research on mammalian biology and evolution. The study sheds light on the unique biology and reproductive strategy of these animals, offering new leads for drug development and genetic management of threatened populations.
Researchers have found unusual sex chromosomes in platypus, emu, and duck using cutting-edge sequencing techniques. The studies reveal that platypus has ten sex chromosomes paired together in a head-to-tail manner, whereas birds have ZW sex chromosomes.
Paleontologists reconstructed the chewing motion of a 150-million-year-old early mammal, revealing teeth that worked extremely precisely and efficiently. This unique dentition made it easy for the animal to cut flesh, but also may have limited its ability to adapt to changing food conditions.
A newly discovered receptor in Arabidopsis thaliana has helped scientists understand the evolution of the GET pathway, a mechanism that enables membrane protein transport. The receptor's discovery provides crucial insights into the evolution of this pathway across organisms.
Researchers discovered a nearly complete skeleton of Adalatherium, a giant mammal that defies explanation due to its unusual trunk vertebrae and limbs. The creature's front legs were adapted for sprinting, while its hind legs resembled those of crocodiles.
Researchers analyzed published research to find 565 mammalian species used in traditional medicine globally, highlighting the threat of overexploitation. Closely related species are often used to treat similar diseases.
Global study reveals optimum breeding dates vary by species, population, and year, with some females adjusting their dates to buffer natural-selection variability. The findings have implications for understanding animal adaptation and conservation efforts.
Researchers determined the function of IL-15L using rainbow trout, finding it stimulates type 2 immunity by inducing cytokine IL-4 and IL-13. In contrast, trout IL-15 selectively induces type 1 immunity through interferon-g expression.
A recent review of published studies found that male behavior causing harm to females during mating is a common issue in several mammalian orders. The most common response from females was grouping around a dominant male, suggesting that sexual aggression may not be as widespread as previously thought.
A large international consortium has sequenced the genome of 130 mammals and analyzed existing data to identify important DNA positions. This information can help researchers understand disease mutations in humans and preserve endangered species.
Researchers observed wrinkle-faced bats displaying unique mating behavior, using a mask-like face fold during copulation. This rare lek courtship behavior was previously unknown in bat species, with only 12 instances found across mammals.
Climate change was a major factor in the extinction of 38 genera of large mammals in North America at the end-Pleistocene glacial-interglacial transition. The species' histories and adaptive tolerances were critical in their survival during earlier transitions, but not at the last transition when humans arrived.
A landmark study published in the Journal of Vertebrate Paleontology describes a fossil family that illuminates the origin of perissodactyls, including horses, rhinos, and tapirs. The research provides insights into the evolutionary history of these mammals, suggesting they evolved in isolation in or near present-day India.
A new study reveals that mammals were socially interacting during the Age of Dinosaurs, contradicting previous assumptions. The discovery of a new genus, Filikomys primaevus, indicates that these early mammals engaged in multi-generational, group-nesting and burrowing behavior.
Researchers at the University of Barcelona have identified new genes in the BEX/TCEAL cluster that are related to autism spectrum disorder and other neurological diseases. The study used animal models to describe molecular mechanisms involved in the development of the neocortex in humans and other placental mammals.
The Permian-Triassic mass extinction marked the origin of endothermy in both synapsids and archosaurs, with evidence suggesting a 'switch' around 250 million years ago. This coincided with the emergence of erect posture and hair in mammal ancestors, as well as feathers in bird ancestors.
A tiny jaw from Greenland has revealed the earliest known example of dentary bone with two rows of cusps on molars and double-rooted teeth, offering insights into mammal tooth evolution. The discovery suggests that complex occlusion and double-rooted teeth developed together in early mammals.
Research on 200 million-year-old mammal teeth reveals they functioned like reptiles, living up to 14 years. Fossilized cementum rings were used to determine lifespan, contradicting previous warm-blooded mammal assumptions.
A 2014 seal flu outbreak revealed how avian flu viruses can adapt to infect mammals. Researchers found that specific mutations in the hemagglutinin protein enabled the virus to become transmissible via air between ferrets and potentially other mammals.
A study on fossils reveals that native South American mammals were disproportionately extinct, leading to a higher number of North American ancestors in the region. This biotic exchange event resulted from the formation of the Isthmus of Panama.
Researchers analyzed dietary signatures of African and South American mammals to reconstruct ancient ecosystems. They found a similar mean dietary carbon isotopic value between Amazonian and African closed-canopy rainforests, but lacked highly negative values used to infer rainforests in fossil records.
Researchers analyzed isotopic data from Amazonian and African mammals to understand feeding habits and ecosystems. The study found no significant difference in dietary carbon isotope signatures between the two regions, but noted Amazonian mammals had more limited dietary resources.
A study in Borneo found that degraded tropical forests have a high conservation value for 28 tropical mammal species. Mammals tend to avoid heavily degraded areas with open canopies and reduced vegetation density, highlighting the importance of maintaining good quality forest habitat.
Researchers use innovative microscopy method to analyze bird brain structure, finding similarities with mammalian neocortex. The study reveals horizontal and vertical layers, refuting long-held assumptions about avian brain organization.
Two studies found that birds' pallium exhibits a layered architecture similar to mammals', potentially enabling complex cognitive abilities like consciousness. This structure may have been present in the last common ancestor of birds and mammals 320 million years ago, or evolved independently through convergent evolution.
Researchers found that human activity such as habitat change and overhunting are responsible for the overwhelming loss of mammal diversity across Latin America. More than half of species in medium and large mammals have died out since European colonization.
Newly hatched tortoises preferentially orient toward face-like representations, which may be an evolutionary leftover from a common ancestor of mammals, birds, and reptiles. This exploratory behavior could play a role in learning and development.
A new study reveals that civil wars have a negative impact on native mammal populations, with increased access to automatic weapons and suspension of anti-poaching patrols leading to population collapse. The authors warn that restoring depleted wildlife populations may take many decades and require active intervention efforts.
A recent study published in Conservation Letters reveals that conservation efforts have prevented the global extinction of at least 28 bird and mammal species since 1993. The species include the Puerto Rican Amazon, Przewalski's Horse, and Iberian Lynx, among others.
A new study finds that human impact is responsible for 96% of all mammal extinctions over the last 126,000 years. The research suggests that mammals were resilient to extreme fluctuations in climate and that current climate change poses a significant threat to species
Research by a University of Queensland-led team shows that protected areas have doubled the populations of 80% of monitored mammal species over the last 50 years. Protected land is home to 10% of analysed species, highlighting their importance in conserving biodiversity.
Researchers found that naked mole-rats have poor hearing due to six mutations in genes associated with hearing loss. Without cochlear amplification, the constant noise they produce doesn't harm their hair cells, making this adaptation beneficial for their survival.
A new global review found that big mammals like elephants, rhinos, and primates are threatened with extinction in national parks of the world's poorest countries. Illegal hunting is a major driver of population declines, particularly in Asia where stricter protected areas have higher rates of illegal hunting.
A recent study by researchers at Swansea University found that inbreeding can reduce cooperation in banded mongooses. Inbred pups that receive extensive care from adults have similar survival rates to outbred pups, but eventually become bad carers when they are older.
The study reveals a remarkable genetic connection between the tuatara, a reptile that lived with dinosaurs, and mammals such as platypus and echidna. The genome analysis shows an unusual combination of mammalian and reptilian components, with some sequences similar to those found in platypus.
A new study of over 44,000 species reveals herbivores have consistently faced the highest threat of extinction in modern times, past decades, and the late Pleistocene era. The research also shows that ocean predators are facing greater existential pressures than their land-dwelling counterparts.
A new study suggests that mammalian immune cells may be less effective at detecting and responding to microorganisms from other planets, potentially posing a threat to space missions. The researchers tested the immune response of mice to peptides containing amino acids rare on Earth but common on meteorites.
A groundbreaking study using MRI scans of 130 mammalian brains found that brain connectivity levels are equal in all species, including humans. The research revealed a universal law: Conservation of Brain Connectivity, which suggests that the efficiency of information transfer in the brain's neural network is the same across mammals.
A new PLOS Biology paper proposes a set of principles for creating and governing lists of the world's species, aiming to address the lack of an agreed list of all species. The proposed governance mechanism ensures that taxonomists' decisions are informed by stakeholders' needs.