Articles tagged with Monkeys
Researchers documented a wild cat species imitating the call of its intended victim, a small monkey known as a pied tamarin, to draw it within striking range. The behavior was confirmed through observations in the Amazonian forests of Brazil, providing insights into the psychological cunning of wild felids.
A study published in the journal Neuroscience found that regular aerobic exercise speeds learning and improves blood flow to the brain's motor cortex. Monkeys who exercised regularly performed better on cognitive tests than their sedentary counterparts, suggesting similar benefits for humans.
In a series of experiments, capuchin monkeys were given tokens to choose between their favorite food or a buffet of options. They consistently opted for the variety tokens, even when the favorite food was included in the assortment. This suggests that these animals have an innate desire to seek variety in their diet. The findings have ...
A study by Argentine scientists reveals that yellow fever outbreaks in howler monkey populations in northeastern Argentina have tragic conservation implications for the endangered brown howler monkey. The research emphasizes the importance of wildlife monitoring as an early detection method for pathogens affecting both animals and humans.
A newly analyzed 47-million-year-old Darwinius fossil was found to not be a human ancestor, contrary to previous claims. The fossil is now believed to be a forebearer of modern-day lemurs and lorises, according to two papers published in the Journal of Human Evolution.
Researchers analyzed global warming's impact on four New World monkey species, finding a significant drop in their populations during climate fluctuations. The team used statistical models to investigate how food resources and tree responses related to temperature and rainfall patterns.
New research suggests that some nonhuman animals, including dolphins and macaque monkeys, may possess functional parallels to humans' consciousness and cognitive self-awareness. These species exhibit behaviors such as hesitation and uncertainty, indicating a capacity for metacognition.
Researchers found that cotton-top tamarins responded to music with emotions such as anxiety and calmness, mirroring human responses. The study suggests that animals use musical elements to convey emotional content, similar to humans, and could have deep evolutionary roots.
A study found that capuchin monkeys prefer the company of researchers who imitate them, spending more time with their imitators. The monkeys also chose to engage in a task with their imitators over non-imitators, indicating a sense of affiliation.
A new monkey species, Mura's saddleback tamarin, has been discovered in the Amazon region of Brazil. The monkey is related to saddleback tamarins and faces threats from planned dams and highway construction.
A new fossil primate from Myanmar has redefined the origin of anthropoid primates, challenging the long-held belief that they evolved in Africa. The discovery of Ganlea megacanina supports the idea that amphipithecids are closely related to living anthropoids.
Rhesus monkeys demonstrate configural face perception, recognizing friends from foes based on facial feature layout. This ability has been conserved through primate cognitive evolution for 30 million years.
Researchers at Harvard University have demonstrated that individual monkeys within the same species exhibit varying levels of cognitive ability. A study published in PLoS One found that general intelligence, or 'g' factor, accounted for 20% of the variation in performance among cotton-top tamarins.
Researchers found that minor differences in cell proliferation timing can explain large differences in eyes of owl monkeys and capuchin monkeys. This discovery reveals an evolutionary mechanism for changes in brain structure, enabling flexibility in eye specialization.
Researchers found that wild spider monkeys regulate their daily protein intake similarly to humans, with a focus on maintaining a consistent level regardless of seasonal food availability. This pattern is linked to the development of obesity in humans and may have evolutionary origins dating back far older than previously thought.
Researchers discovered that only minor differences in cell proliferation timing explain the anatomical differences between owl and capuchin monkey eyes. This finding sheds light on how complex structures like the eye evolve gradually through evolution without compromising function.
Monkeys predominantly chose sharing tokens with relatives and familiar individuals, showing empathy-driven prosocial behavior. The study suggests that giving may be self-rewarding for monkeys due to social closeness.
The discovery of tiny fossilized teeth from India pushes the primate timeline back by almost 10 million years, revealing a new genus and species of anthropoid primates. The findings suggest these early primates lived on a fruit and insect diet and were no larger than modern dwarf lemurs.
A study has found that several people in South and Southeast Asian countries have been infected with simian foamy virus, a primate virus that has not been shown to cause human disease. Researchers tested about 300 people who live or work closely with monkeys and found eight participants positive for the virus.
The kipunji monkey is critically endangered with only 1,117 individuals remaining in the wild. Habitat degradation and poaching pose significant threats to its survival.
In a study published in PLOS ONE, capuchin monkeys were found to reason about symbols in economic choices, showing a preference for items A and C over B, both with tokens and actual foods. This suggests that these animals can comprehend and use symbols, although their symbolic competence may differ from that of humans.
Researchers found that smaller primates have an evolutionary edge due to their ability to climb with minimal energy expenditure. This discovery challenges the longstanding assumption that climbing is energetically expensive for all primates.
Pig-tailed langurs on Mentawai islands show no alarm at tiger and leopard sounds but flee quickly from human voices. The study suggests animal behavior changes under relaxed selection pressures.
Cotton-top tamarins display grasps consistent with end-state comfort in experiments, suggesting sophisticated motor planning. The results challenge previous attributions of nonhuman species' cognitive abilities.
The report highlights the devastating impact of habitat loss, hunting, and climate change on primates, with 114 species threatened with extinction. The World's 25 Most Endangered Primates list reveals that these animals are crucial to maintaining ecosystem balance, making their survival critical for the health of our planet.
A study on human, chimpanzee, and rhesus monkey genomes reveals that humans and rhesus monkeys have purged ERV-K copies from their genomes, while chimpanzees have retained a greater number of complete ERV-K copies. This finding suggests that genetic fluctuations due to bottlenecks and expansion play a role in shaping ERV-K dynamics.
Research in capuchin monkeys reveals a connection between sex, handedness, and brain structure. The study found that male monkeys have a smaller corpus callosum than females, while right-handed individuals have a smaller relative size of the corpus callosum than left-handed individuals. This pattern mirrors findings in humans.
A recently discovered fossil skull of Aegyptopithecus zeuxis, an ancient primate relative of humans, apes, and monkeys, contradicts previous assumptions about its brain size. The study suggests that the species' brain was smaller than expected, with a visual cortex indicating sharp vision, and may have had a large social group.
A study by Columbia's Primate Cognition Laboratory found that monkeys can acquire meta-cognitive skills, reflecting on their thought process and assessing performance. This ability has far-reaching implications for understanding cognitive development in infants and autistic children.
Rhesus monkeys display neonatal imitation, reproducing human tongue protrusion and lip smacking after watching experimenters perform similar gestures. The study suggests that imitation may have evolved earlier in the primate tree than previously thought.
A new study found that ancient birds of prey like African crowned eagles likely feasted on some of our earliest human ancestors. The researchers analyzed over 600 bones from monkey skulls, which showed puncture marks and scratches consistent with the grip of an eagle's talons.
Researchers warn that viruses like HIV and influenza can spread from monkeys to humans through contact in settings such as temples, markets, and homes. By taking precautions like using caution around monkeys, following proper wound care, and implementing public health measures, the risk of transmission can be reduced.
Scientists suggest that primates evolved good close-up eyesight to avoid snakes, which were the primary predators of modern mammals. Fossil records show that snakes emerged around 100 million years ago, prompting primates to adapt their vision.
The newly discovered Rungwecebus monkey is a distinct genus, marking the first new species since 1923. The critically endangered monkey's habitat faces severe logging threats, prompting calls for global protection.
Scientists describe new genus of African monkey, Rungwecebus kipunji, after analyzing physical characteristics and molecular samples. The discovery sheds light on the evolutionary history of monkeys in Africa and Eurasia.
A team of international scientists has discovered a new African monkey genus, Rungwecebus kipunji, through collaborative research. The species, found in Tanzania's high-altitude forests, exhibits distinct physical characteristics and is closely related to baboons, highlighting the need for conservation efforts to protect its vulnerable...
Researchers from Yale University found that capuchin monkeys display similar economic biases to humans, including a preference for bonuses over losses. The study suggests that loss-aversion may be an innate feature of economic choice.
Researchers dispelled the myth that eating late at night causes weight gain. Female rhesus monkeys on a high-fat diet gained 5% more weight after having their ovaries removed, showing ovarian hormones play a role in weight balance. The study found no correlation between late-night eating and weight gain.
In a study published in Biology Letters, researchers found that male monkeys of two species experience a 10% weight gain when their mates are pregnant. This gain is likely due to hormonal changes, including increased prolactin and estrogen levels. The study's findings could provide insights into human fathering behavior and motivate me...
A recent study found that performing monkeys in Asia carry various simian viruses, including simian foamy virus and simian retrovirus. These viruses pose a potential risk of transmission to humans, particularly in settings where people have close contact with non-human primates.
Researchers found that two monkey species, cotton-top tamarins and common marmosets, exhibit differing propensities toward patience and impulsivity depending on the context of the choice being made. The study suggests that impulsivity is context-specific and shaped by a history of ecological pressures.
Scientists identified single neurons in the brain's pitch center that recognize a middle-C as a middle-C even when played by two different instruments. This discovery solves an age-old mystery of auditory research and highlights the importance of pitch perception to humans, facilitating melodic patterns and emotional content of speech.
Studies have pinpointed a chromosome region and genetic markers for macular degeneration in humans and rhesus monkeys. This breakthrough could lead to better treatments and even a cure by studying the disease's progression in monkeys, which age faster than humans.
A study has found that a primate virus, simian foamy virus, has jumped the species barrier to humans in Asia, primarily through contact with temple macaques. Researchers warn that limiting human-primate interaction can reduce transmission risks and protect both humans and monkeys from disease.
In a groundbreaking study, rhesus monkeys demonstrated the ability to assess visual perspectives of others during competitive interactions for food. By considering whether a competitor could or couldn't see them, monkeys made strategic decisions to maximize their chances of acquiring food.
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.
In a groundbreaking study, researchers confirmed that wild capuchin monkeys in northeastern Brazil routinely crack open palm nuts using heavy stones. The behavior was previously observed only in chimpanzees and other primates. This finding expands our understanding of tool use among non-human primates.
A new fossil discovery in Spain reveals a 13-million-year-old ape species, Pierolapithecus catalaunicus, that shares key features with modern great apes. The species' unique adaptations for climbing and its relatively complete skeleton suggest it may have been the last common ancestor of all great apes.
Callimico monkeys eat fungi during the dry season, a trait shared by no other tropical primate species. They also exhibit a different reproductive strategy than other small New World monkeys, giving birth to single offspring twice annually.
Researchers at Duke University found that ringtails and mongoose lemurs can learn sequences of pictures and discriminate quantities. The animals show a systematic learning ability and can recognize larger quantities, but their numerical abilities are not as sophisticated as those of monkeys and apes.
Recent discoveries, including a photo and skin samples, have reignited hopes of finding the Miss Waldron's red colobus monkey in its remote southeastern corner of Ivory Coast. The discovery has sparked concerns about potential extinctions of other high-canopy forest-dwelling animals.
Researchers have identified a specialized area in the monkey brain's left temporal lobe that processes species-specific vocalizations, mirroring the human brain's linguistic abilities. This finding suggests that vocalizations can be deciphered better when processed by one temporal pole rather than both.
A recent study found a correlation between the loss of olfactory receptor genes and the acquisition of full trichromatic color vision in primates. The research team analyzed 19 primate species, including humans, and discovered that Old World monkeys and apes had similar percentages of OR pseudogenes, while New World monkeys had lower p...
Researchers found that monkeys learned and applied strategies to distinguish order in image sequences with high accuracy. The study revealed two distinctive properties: distance effects and magnitude effects, which mimic human responses to memory tasks and number discrimination tasks.
Researchers used fMRI to directly compare human and monkey brain activity, discovering differences in areas of the visual cortex. The study found that humans have distinct regions involved in processing 3-D images, which do not exist in monkeys.
Scientists have gained valuable insights into AIDS by studying the simian immunodeficiency virus in monkeys. Researchers are now exploring ways to vaccinate against HIV transmission and eliminate latent viruses.
The Tumucumaque Mountains National Park, covering 9,562,770 acres, protects pristine forests and endangered species like jaguars, giant anteaters, and harpy eagles. The park ensures the conservation of biodiversity in the Brazilian Amazon.
A study by Duke University scientists found that excess plant-eating monkeys on small islands spur extra tree growth, boosting insect populations that attract birds. The density of birds is strongly correlated with the density of howler monkeys.
Scientists have discovered two new monkey species, Callicebus bernhardi and Callicebus stephennashi, which are named after Prince Bernhard and Stephen Nash. These discoveries highlight the vast biodiversity of the Amazon rain forest, with over 95 species of primates found in Brazil alone.
A recent study suggests that infants 'tune in' to familiar face groups and perform better at recognizing faces of humans than other species. The researchers propose that this specialization occurs only with experience in viewing faces and may signal a general change in neural networks involved in early cognition.