Articles tagged with Primates
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.
A recent study published in BMC Evolutionary Biology found that lemurs with strikingly different coat colors are genetically related and belong to the same species. The research analyzed mitochondrial genes from 70 mouse lemurs, showing they all belong to Microcebus griseorufus, regardless of their geographical location.
A new lemur species has been named Microcebus mittermeieri in honor of Conservation International President Mittermeier. The discovery was made by researcher Mireya Mayor and her team, highlighting the importance of protecting Madagascar's vital lemur habitat.
Researchers have identified three new species of lemurs, expanding our knowledge of these endangered animals. The study, published in BMC Evolutionary Biology, uses genetic analysis to reveal distinct species characteristics, shedding light on the importance of conservation programs for lemurs native to Madagascar.
The new book provides comprehensive information on lemurs, including detailed photos and illustrations, to help identify the 71 species found in Madagascar. Conservation International's updated guide highlights the critical need to protect lemurs due to deforestation and habitat destruction.
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.
A landmark study on lemur nutrition by Dr. Jennifer Campbell reveals that lemurs have different dietary requirements, with some eating leaves, fruits, insects, seeds, and nuts. Her research has led to the development of a proper diet for the animals, improving their health and reproductive success.
Newly discovered primate fossils in Egypt double the known age of bushbabies and lorises, suggesting they may have originated in Indo-Madagascar instead of Africa. This finding pushes back the divergence times and origins of primates, including human ancestors, to around 90 million years ago.
New research predicts that up to half of African primate species could go extinct within decades due to habitat loss. The study suggests an 'extinction debt' has been incurred as a result of widespread deforestation in Africa.