Articles tagged with Primates
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A new facial recognition system, LemurFaceID, identifies over 100 individual lemurs with 98.7% accuracy, providing a rapid and cost-effective method for long-term research of endangered species. This technology also offers a humane alternative to capture and collar methods.
A new facial recognition system, LemurFaceID, can correctly identify individual lemurs using photos of their faces, offering a non-invasive alternative to traditional methods. The system shows high accuracy in identifying lemurs across different species, with potential applications for conservation and research.
A new study found that ring-tailed lemur populations have declined significantly due to habitat destruction and hunting, with only three sites containing more than 200 individuals. The species is ecologically adaptable but many other lemurs in Madagascar are also in dire straits.
A recent study has uncovered evidence of HIV-related retroviruses dating back 60 million years, challenging previous estimates of their origin. The research, led by Daniel Elleder, analyzed genomic data from the Malayan flying lemur and reconstructed ancient viral genomes.
In a controlled study, researchers found that two aye-ayes and a slow loris could discriminate between varying concentrations of alcohol and preferred the highest concentrations. The findings support the idea that fermented foods were important in human ancestors' diets, potentially pre-adapting humans for the Neolithic Revolution.
A new study published in Proceedings of the National Academy of Sciences analyzed DNA from five different mouse lemur species to understand Madagascar's past. The analysis revealed that the island was once linked by a patchwork of forested areas, enabling mouse lemurs to disperse over tens of thousands of years between different regions.
Researchers at Duke University used fast-changing mouse lemur DNA to paint a picture of Madagascar's forested past. The study suggests that the island was not as tree-covered as previously thought, with grasslands and woodlands dominating the center of the island before human arrival.
The discovery of three new mouse lemur species in Madagascar highlights the need for conservation efforts to protect these tiny primates. The study, which used advanced statistical methods, provides insight into the evolutionary process and has significant implications for clarifying diversity in other species.
Ring-tailed lemurs combine wrist and chest secretions to create more complex scents, increasing the amount of information conveyed by a single dab. This mixture may also lock in fleeting aromas and boost their staying power.
Almost one-third of lemurs in Madagascar are kept as illegal pets, posing a threat to conservation efforts. Investigators found 302 captive lemur sightings and 15% of hotels with illegal captive lemurs advertised to tourists.
Researchers used whole-transcriptome sequencing to screen for blood-borne diseases in wild lemurs and found several strains of parasites similar to those causing Lyme disease. The approach could pave the way for earlier detection of future outbreaks of zoonotic diseases that move between animals and people.
Researchers found that ringtailed lemurs reserve vocal exchanges for individuals with whom they have close relationships, using them to maintain social bonds even when separated. This study highlights the importance of vocal interactions in establishing familiarity and closeness, a concept applicable to human communication as well.
Researchers found that female lemurs have higher testosterone levels in some species, leading to dominant behavior and challenging traditional gender roles. This discovery suggests that hormones play a role in female dominance in these animals.
Researchers find that ticks are prevalent on lemurs' noses, particularly male Haemaphysalis lemuris, which attach to the nostrils. The study suggests that the nose is a strategic location for ticks to find mates and avoid being plucked off during grooming.
Dwarf lemurs' ability to put their bodies in standby mode, known as torpor, correlates with increased longevity. Hibernating lemurs live up to ten years longer than non-hibernators, staying healthier and reproducing for a longer period.
A study by UC quaternary paleoecologist Brooke Crowley uses strontium isotopes to track the mobility of lemurs and other subfossil mammals over the past 10,000 years. The research aims to shed light on the environmental consequences of forest loss and inform conservation efforts.
Lemurs are expected to lose considerable amounts of suitable habitat due to climate change, with some species shrinking their ranges by nearly 70 percent. The study identifies key forest corridors that need protection for lemurs to reach future habitats.
A study by Temple University researchers found that an estimated 28,000 endangered Madagascar lemurs are being illegally kept as pets in urban areas, threatening conservation efforts. The trade may drive some species closer to extinction and cause populations to go extinct altogether.
A DNA study from Duke University sheds light on the extinction of giant lemurs, finding that their smaller population sizes made them more susceptible to extinction. The research suggests that lessons learned from ancient DNA can be useful in protecting remaining species.
A new study by Rice University researchers reveals lemurs play a crucial role in dispersing seeds for trees, increasing survival rates. The findings highlight the importance of preserving lemur populations to maintain the health of Madagascar's rainforests.
A long-term study of wild brown mouse lemurs found they can live at least eight years, twice as long as previously estimated, with no physical signs of aging. The research also revealed no difference in testosterone levels between male and female mouse lemurs, challenging previous assumptions about the role of testosterone in aging.
White-footed sportive lemurs use scent-marks in latrines to maintain contact with family members and inform intruders of a male's presence. The study found that males visited latrines more often during nights when an intruder invaded the territory, promoting social bonding among group members.
Researchers found that light pollution disrupts the reproductive cycle of mouse lemurs, causing testes to grow larger and testosterone levels to increase. The study also showed that light pollution affects the daily activity pattern of lemurs, delaying their nocturnal behavior.
Researchers have discovered how lemurs fight the Cryptosporidium parasite using next-generation sequencing technology. This breakthrough could aid in conservation efforts and develop new methods for detecting and treating the infection.
A study by researchers at Duke University found that fruit-eating lemur species excel in spatial memory tests, demonstrating a strong link between diet and cognitive abilities. The findings suggest that lemurs with diets rich in fruits, which are seasonally available and often hard to access, develop superior spatial memory skills.
A team of researchers, including a Western University primatologist, has developed an action plan to conserve Madagascar's 101 lemur species. The plan outlines strategies for 30 priority sites and aims to raise funds for individual projects.
A new study found that lemur lovers mirror each other's scent-marking behavior and emit similar odors, possibly as a way to defend territory or advertise their relationship status. The study revealed that lemur couples with kids have more similar scents than those without offspring.
A 35-year study of ring-tailed lemurs at the Duke Lemur Center found that infants born to older mothers are less likely to get hurt than those born to younger mothers. The results suggest that older moms may be better at fending off attackers or protecting their infants during fights.
A CU-Boulder-led team has discovered that ring-tailed lemurs in Madagascar consistently sleep in limestone chambers for their nightly rest. The behavior provides safety from predators, access to water and nutrients, and refuge from human activities.
Researchers studying hibernating fat-tailed dwarf lemurs found they can go days without deep sleep during winter hibernation. This supports the idea that sleep regulates body temperature and metabolism in humans.
Researchers found that dwarf lemurs experience REM sleep at high temperatures, while ground squirrels do not, suggesting a link between temperature and metabolism. The study confirms that hibernation is not a state of dormancy but rather a unique form of sleep.
Researchers from Mainz and Antananarivo have identified a previously unknown primate species, the Lavasoa Dwarf Lemur, with an estimated population size of less than 50 individuals. The newly described species inhabits isolated forest fragments in southern Madagascar and is considered extremely rare and endangered.
Researchers discovered that Sahamalaza sportive lemurs significantly increase vigilance after hearing alarm calls of nearby species, including the crested coua and blue-eyed black lemur. This study provides insight into the lemurs' ability to glean information on predator presence and type from referential signals.
A study at Duke University found that lemurs in larger social groups exhibit more 'social intelligence' and are more likely to steal food behind a human's back. The research supports the 'social intelligence hypothesis,' suggesting that living in large social networks drove the evolution of complex social cognition in primates.
A personality test conducted on grey mouse lemurs found distinct personalities among the animals, with some exhibiting shy behavior and others being bold. The study aims to improve breeding programs and reintroduction efforts for these endangered primates.
Researchers have discovered that two little-known lemur species in Madagascar burrow underground and hibernate for three to seven months. The study suggests that primate hibernation may not be as rare or unique as previously thought, offering insights into the behavior of these close genetic relatives.
The complete genomes of three aye-aye lemur populations in Madagascar have been sequenced, revealing genetic diversity and historical separation. The research aims to prioritize conservation efforts for these critically endangered species, which are threatened by habitat loss and fragmentation.
Two new species of mouse lemurs have been identified by Duke University scientists, one named Anosy mouse lemur and the other Marohita mouse lemur. The genetic analysis reveals that these species are distinct and do not interbreed with other recognized mouse lemur species.
Scientists have sequenced and analyzed three lemur populations to guide conservation efforts, revealing significant genetic distance between northern and eastern aye-ayes. The study also compared human and lemur genetic diversity, suggesting the aye-ayes were separated for an extended period by geographic barriers.
Researchers studying the endangered lemur found that females live longer than males, on average into their early 30s. The team's findings suggest that age-specific dispersal behavior may carry greater costs for males, leading to earlier mortality.
Climate change in Madagascar could fuel the spread of lemur parasites, carrying diseases like plague and typhus. The team created probability maps of likely parasite distributions today and estimated future expansions by up to 60%.
An international team of scientists has discovered a new species of slow loris in Borneo, recognizing four existing species as distinct from previously considered subspecies. The discovery highlights the need for urgent conservation efforts due to human activity threats and the pet trade.
Researchers found that grey mouse lemur females can distinguish between advertisement calls from unrelated males and their fathers, suggesting a mechanism for avoiding inbreeding. This discovery provides evidence that paternal recognition through vocalizations is not exclusive to complex social groups.
Research on lemur extinctions over 2,000 years reveals that remaining species go into 'ecological retreat,' increasing extinction risk. Surviving lemurs rely on denser habitats due to vacant environmental niches, which may be a result of human disturbance.
A team of researchers tracked mouse lemur lice to understand their social interactions, finding that lice transfer occurred between 43% of males, with peak transfers during breeding season. Louse transfer showed greater distances and geographic areas than previously thought.
Researchers tracked the transfer of parasitic lice on brown mouse lemurs to infer their social contacts and habits. The study found that lice were transferred between 43% of males during the breeding season, indicating conflicts over females.
Recent research in Madagascar reveals that illegal hunting of protected species, including lemurs, is widespread due to increasing appetites for meat and declining traditional taboos. The study suggests that improving access to domestic meats and disease control methods can help reduce pressure on wild species.
A Duke University study found that hormonal contraceptives alter the chemical cues used by ring-tailed lemurs to determine genetic fitness and relatedness. The study also showed that males are less interested in females treated with contraceptives, suggesting potential effects on human mate choice.
A comprehensive study of mouse lemurs in Madagascar has identified a high diversity of population-level lineages, challenging traditional methods of species delimitation. The research uses multiple lines of evidence to recognize lineage diversity and presents the most thoroughly sampled species delimitation of mouse lemur ever performed.
Researchers identified scent secretions in lemurs that encode markers of relatedness, preventing inbreeding and facilitating nepotism. The study reveals a complex olfactory mechanism allowing lemurs to recognize family ties and avoid unfamiliar kin.
Research led by Dr. Cédric Feschotte found a retrovirus related to HIV integrated into lemur genomes around 4.2 million years ago. This discovery provides insights into the evolution of lentiviruses and raises the possibility that HIV-like viruses are still circulating in Madagascar.
Researchers have digitally reconstructed a nearly complete skull of the extinct lemur species Hadropithecus stenognathus, providing new insights into its diet and body size. The study reveals that the lemur was as large as a male baboon and had a brain size comparable to some large monkeys.
Researchers have confirmed a new population of critically endangered greater bamboo lemurs in eastern Madagascar's Torotorofotsy wetlands. The discovery raises hopes for the species' survival and increases efforts to protect its habitat from destruction.
Malagasy mouse lemurs use advertising calls to attract mates of their own species, ignoring those of similar but different species. This unique communication method helps prevent hybridization and ensures genetic purity.
A new conservation plan has been developed to protect thousands of rare species in Madagascar, using advanced analysis to identify the most critical areas. The researchers' method could be applied to other high-priority regions for conservation, providing a new approach to saving endangered species.
A massive study of Madagascar's wildlife provides a blueprint for conservation, highlighting key areas to protect and prioritizing endangered species. The research uses data from thousands of species and advanced techniques to identify the most important areas for saving fauna and flora.
Analysis of ancient Hadropithecus stenognathus hand bones reveals a novel joint configuration on the little finger, differing from other primates. The discovery highlights the diversity of lemurs that existed over 2,000 years ago.
A team of researchers used miniature backpacks with accelerometers to study the gliding behavior of Southeast Asian colugos, also known as flying lemurs. The findings show that colugos push off from trees more forcefully for long jumps but quickly reach terminal velocity and land with reduced impact forces.
A new study by Penn State University finds that colugos, also known as flying lemurs, are the closest living relatives of primates. The researchers used molecular and genomic data to analyze the evolutionary relationships among three groups: primates, colugos, and tree shrews.
Researchers analyzed mitochondrial genes of 70 lemurs suspected of being different species due to striking coat colors, finding they belonged to the same Microcebus griseorufus species. Genetic analysis revealed no significant differences among them, suggesting that morphological variations may not necessarily indicate distinct species.