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Primates; Journal of Primatology

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https://www.readbyqxmd.com/read/28293756/the-40th-anniversary-of-the-ai-project-the-commemorative-gift-is-a-silk-scarf-painted-by-ai-the-chimpanzee
#1
EDITORIAL
Tetsuro Matsuzawa
No abstract text is available yet for this article.
March 14, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28281099/tool-use-by-amazonian-capuchin-monkeys-during-predation-on-caiman-nests-in-a-high-productivity-forest
#2
Kelly Torralvo, Rafael M Rabelo, Alfredo Andrade, Robinson Botero-Arias
Descriptions of new tool-use events are important for understanding how ecological context may drive the evolution of tool use among primate traditions. Here, we report a possible case of the first record of tool use by wild Amazonian capuchin monkeys (Sapajus macrocephalus). The record was made by a camera trap, while we were monitoring caiman nest predation at Mamirauá Reserve in Central Amazonia. An adult individual was registered in a bipedal posture, apparently using a branch as a shovel to dig eggs out of a nest...
March 9, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28229260/dehydroepiandrosterone-sulfate-dhea-s-sex-and-age-in-zoo-housed-western-lowland-gorillas-gorilla-gorilla-gorilla
#3
Ashley N Edes
Among humans, dehydroepiandrosterone-sulfate (DHEA-S) declines with age and is hypothesized to be involved in somatic maintenance and healthy aging. Men have significantly higher DHEA-S than women, contradicting longer lifespans in the latter. Declines of DHEA-S with age also are observed in chimpanzees. In both chimpanzees and bonobos, males and females show no differences in DHEA-S production. Based on human and chimpanzee data, gorillas were predicted to show declining DHEA-S with age. Similar to chimpanzees and bonobos, it also was predicted DHEA-S would not be significantly different between males and females...
February 22, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28220267/chimpanzee-down-syndrome-a-case-study-of-trisomy-22-in-a-captive-chimpanzee
#4
Satoshi Hirata, Hirohisa Hirai, Etsuko Nogami, Naruki Morimura, Toshifumi Udono
We report a case of chimpanzee trisomy 22 in a captive-born female. Because chromosome 22 in great apes is homologous to human chromosome 21, the present case is analogous to human trisomy 21, also called Down syndrome. The chimpanzee in the present case experienced retarded growth; infantile cataract and vision problems, including nystagmus, strabismus, and keratoconus; congenital atrial septal defect; and hypodontia. All of these symptoms are common in human Down syndrome. This case was the second reported case of trisomy 22 in the chimpanzee...
February 21, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28213677/a-new-distribution-range-of-ateles-chamek-humboldt-1812-in-an-ecotone-of-three-biomes-in-the-paraguay-river-basin
#5
Manoel Dos Santos-Filho, Christine Steiner São Bernardo, Henry Willian Van der Laan Barbosa, Almério Câmara Gusmão, Leandro Jerusalinsky, Gustavo Rodrigues Canale
Historical records of Ateles chamek (black-faced black spider monkey) suggest that the species range extends further south of the known species distribution, within an ecotonal region between the Amazonia, Cerrado and Pantanal biomes in Brazil. Ecotones are zones of habitat transition with high species richness that remain undersampled as conservationists often prioritize biodiversity hotspots. Thus, distribution ranges may be inaccurately measured when species occur in ecotonal zones. We report the first precise records of A...
February 17, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28197795/effect-of-habitat-fragmentation-on-ranging-behavior-of-white-headed-langurs-in-limestone-forests-in-southwest-china
#6
Zhonghao Huang, Peisong Yuan, Henglian Huang, Xiaoping Tang, Weijian Xu, Chengming Huang, Qihai Zhou
The critically endangered white-headed langur (Trachypithecus leucocephalus) is confined to fragmented karst forests of southwest Guangxi Province, China. A lack of information on the influence of habitat fragmentation on langur behavior has prevented a comprehensive understanding of their ranging behavior and the development of effective langur conservation strategies. We collected comparative data on time budgets, daily path lengths, home range and diets of four langur groups inhabiting the lightly fragmented Fusui forest (G1, G2) and the more heavily fragmented Chongzuo forest (G3, G4)...
February 14, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28180973/fatal-attack-on-a-rylands-bald-faced-saki-monkey-pithecia-rylandsi-by-a-black-and-white-hawk-eagle-spizaetus-melanoleucus
#7
Dara B Adams, Sean M Williams
Predation risk has played an important role in primate behavioral evolution, yet natural primate-predator interactions are rarely observed. We describe the consumption and probable predation of an adult bald-faced saki monkey (Pithecia rylandsi) by a black-and-white hawk-eagle (Spizaetus melanoleucus) at the Los Amigos Biological Station in lowland Amazonian Peru. To our knowledge, this is the first published case of a black-and-white hawk-eagle consuming any primate species. We contend that while most reported observations of successful and attempted predation by raptors involves the largest and most notorious species (i...
February 8, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28168329/a-primate-at-risk-in-northeast-brazil-local-extinctions-of-coimbra-filho-s-titi-callicebus-coimbrai
#8
Renato R Hilário, Leandro Jerusalinsky, Sidnei Santos, Raone Beltrão-Mendes, Stephen F Ferrari
Identifying the factors that determine local extinction of populations is crucial to ensure species conservation. Forest-dwelling primates are especially vulnerable to habitat fragmentation, although few studies have provided systematic evidence of local extinctions. Over an 11-year period, approximately 100 remnant populations of the endangered Coimbra Filho's titi monkey (Callicebus coimbrai) have been found within the geographic range of the species in Bahia and Sergipe, Northeast Brazil. During the present study, extinction of 13 of these populations was recorded through intensive surveys...
February 6, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28116549/run-hide-or-fight-anti-predation-strategies-in-endangered-red-nosed-cuxi%C3%A3%C2%BA-chiropotes-albinasus-pitheciidae-in-southeastern-amazonia
#9
Adrian A Barnett, João M Silla, Tadeu de Oliveira, Sarah A Boyle, Bruna M Bezerra, Wilson R Spironello, Eleonore Z F Setz, Rafaela F Soares da Silva, Samara de Albuquerque Teixeira, Lucy M Todd, Liliam P Pinto
Although primate predation is rarely observed, a series of primate anti-predation strategies have been described. Energetic costs of such strategies can vary from high-cost mobbing, via less costly alarm calling, to low-cost furtive concealment. Here we report the anti-predation strategies of red-nosed cuxiú, Chiropotes albinasus, based on direct observations from four study sites in southeastern Brazilian Amazonia. Over a collective period of 1255 fieldwork hours, we observed nine direct interactions between raptors (all potential predators) and red-nosed cuxiús...
January 23, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28074343/interspecies-sexual-behaviour-between-a-male-japanese-macaque-and-female-sika-deer
#10
Marie Pelé, Alexandre Bonnefoy, Masaki Shimada, Cédric Sueur
Interspecies sexual behaviour or 'reproductive interference' has been reported across a wide range of animal taxa. However, most of these occurrences were observed in phylogenetically close species and were mainly discussed in terms of their effect on fitness, hybridization and species survival. The few cases of heterospecific mating in distant species occurred between animals that were bred and maintained in captivity. Only one scientific study has reported this phenomenon, describing sexual harassment of king penguins by an Antarctic fur seal...
January 10, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28062930/erratum-to-development-and-behavior-of-wild-infant-juvenile-east-bornean-orangutans-pongo-pygmaeus-morio-in-danum-valley
#11
Renata S Mendonça, Tomoko Kanamori, Noko Kuze, Misato Hayashi, Henry Bernard, Tetsuro Matsuzawa
No abstract text is available yet for this article.
January 6, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28044220/social-implications-of-fission-in-wild-formosan-macaques-at-mount-longevity-taiwan
#12
Minna J Hsu, Jin-Fu Lin, Govindasamy Agoramoorthy
Group fission in non-human primates has long been proposed to result from interactions between ecological and social factors. Several studies have documented possible causes for group fission, but its proximate causes and ultimate adaptive values are not yet fully understood. We have examined the existing hypotheses on fission from long-term demographic data of Formosan macaques inhabiting the lowland rainforest at Mt Longevity, Taiwan. Five cases of fission occurred in four social groups. We have recorded two types of fission: one involving the separation of a high-ranking adult male and multiple adult females, the other initiated by adult females from main groups...
January 2, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27619670/genes-social-transmission-but-not-maternal-effects-influence-responses-of-wild-japanese-macaques-macaca-fuscata-to-novel-object-and-novel-food-tests
#13
Coline M Arnaud, Takafumi Suzumura, Eiji Inoue, Mark J Adams, Alexander Weiss, Miho Inoue-Murayama
Using long-term maternal pedigree data, microsatellite analysis, and behavioral tests, we examined whether personality differences in wild Japanese macaques (Macaca fuscata) are associated with additive genetic effects, maternal influences, or belonging to a particular social group. Behaviors elicited by novel-object tests were defined by a component related to caution around novel-objects (Ob-PC1) and behaviors elicited by novel food-tests were defined by correlated components related to consummatory responses (Fo-PC1) and caution around novel foods (Fo-PC2)...
January 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27600514/development-and-behavior-of-wild-infant-juvenile-east-bornean-orangutans-pongo-pygmaeus-morio-in-danum-valley
#14
Renata S Mendonça, Tomoko Kanamori, Noko Kuze, Misato Hayashi, Henry Bernard, Tetsuro Matsuzawa
Orangutans have a long period of immaturity and the longest inter-birth interval (IBI) of all mammals, which can explained by their solitary life style, preventing the mother from rearing two offspring simultaneously (solitary life hypothesis). We collected data on mother-offspring dyads living in a primary lowland forest in Danum Valley, East Borneo in an effort to examine the developmental and behavioral patterns of the subspecies Pongo pygmaeus morio. We analyzed developmental changes in mother-offspring distance, contact, and activity budgets in orangutans ranging from 1 to 7 years of age...
January 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27379650/adolescent-male-chimpanzees-do-not-form-a-dominance-hierarchy-with-their-peers
#15
Aaron A Sandel, Rachna B Reddy, John C Mitani
Dominance hierarchies are a prominent feature of the lives of many primate species. These hierarchies have important fitness consequences, as high rank is often positively correlated with reproduction. Although adult male chimpanzees strive for status to gain fitness benefits, the development of dominance relationships is not well understood. While two prior studies found that adolescent males do not display dominance relationships with peers, additional research at Ngogo in Kibale National Park, Uganda, indicates that adolescents there form a linear dominance hierarchy...
January 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27942982/primates-social-impact-award-2016
#16
EDITORIAL
Tetsuro Matsuzawa
No abstract text is available yet for this article.
December 10, 2016: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27933434/the-nimba-mountains-in-guinea
#17
EDITORIAL
Tetsuro Matsuzawa
No abstract text is available yet for this article.
December 8, 2016: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27904967/relocation-stress-induces-short-term-fecal-cortisol-increase-in-tonkean-macaques-macaca-tonkeana
#18
Carlo Cinque, Arianna De Marco, Jerome Mairesse, Chiara Giuli, Andrea Sanna, Lorenzo De Marco, Anna Rita Zuena, Paola Casolini, Assia Catalani, Bernard Thierry, Roberto Cozzolino
The level of glucocorticoids, especially if obtained from noninvasive sampling, can be used as an index of animal well-being, allowing evaluation of the animal's response to environmental modifications. Despite evidence that these hormones play a relevant role in energy metabolism regulation in perceived or real stress events, little is known regarding the factors that could modify the capability of animals to cope with relocation events. The aim of this research was to assess fecal cortisol metabolite concentrations before, during and after acute stress (transfer and relocation event) in two well-established social groups of Tonkean macaques (Macaca tonkeana)...
November 30, 2016: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27900569/status-of-urban-populations-of-the-long-tailed-macaque-macaca-fascicularis-in-west-sumatra-indonesia
#19
Kurnia Ilham, Rizaldi, Jabang Nurdin, Yamato Tsuji
We studied long-tailed macaque (Macaca fascicularis) populations in Padang, West Sumatra, Indonesia, focusing on the effect of human provisioning on their demography and dietary composition. We conducted a field survey at three sites in the city: Gunung Meru, Gunung Padang, and Gunung Panggilun. Mean troop size (range 28-68) and infant ratio (range 0.38-1.00) were greater in Gunung Meru, where the macaques have been highly provisioned, than at the other two study sites (troop size 10-15; infant ratio 0.00-0...
November 29, 2016: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27858173/a-first-report-of-non-invasive-adenovirus-detection-in-wild-assamese-macaques-in-thailand
#20
Manakorn Sukmak, Worawidh Wajjwalku, Julia Ostner, Oliver Schülke
Several simian adenoviruses (AdVs) have been detected and isolated in various species of non-human primates with the goals of monitoring the health of wildlife and investigating their potential for zoonotic disease transmission. Here, we provide evidence of AdV infection in wild Assamese macaques (Macaca assamensis assamensis) at Phu Khieo Wildlife Sanctuary, Thailand, based on polymerase chain reaction of non-invasively collected fecal samples. Eight out of 110 fecal samples (7.3%), or five out of 87 monkeys (5...
November 17, 2016: Primates; Journal of Primatology
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