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Primates; Journal of Primatology

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https://www.readbyqxmd.com/read/28429170/comparison-of-energy-balance-between-two-different-sized-groups-of-japanese-macaques-macaca-fuscata-yakui
#1
Yosuke Kurihara, Goro Hanya
Quantifying the energy balance is essential for testing socio-ecological models. To reveal costs and benefits of group living in Japanese macaques from the perspective of feeding competition, Kurihara and Hanya (Am J Primatol 77:986-1000, 2015) previously compared feeding behavior between two different-sized groups of macaques (larger group 30-35 individuals; smaller group 13-15 individuals) in the coastal forest of Yakushima, Japan. The results suggested that the larger group exhibited greater feeding effort because of intragroup scramble competition and that the smaller group suffered from higher travel costs, possibly owing to intergroup contest competition...
April 20, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28378197/non-dietary-analytical-features-of-chimpanzee-scats
#2
Caroline A Phillips, Richard W Wrangham, William C McGrew
Non-dietary aspects of ape scats such as scat weight and diameter are correlated with age and sex of defaecator for gorillas and orangutans. Defaecation rates of primates, including apes, illuminate their role as primary seed dispersers. We assess if non-dietary features of scats for East African chimpanzees (Pan troglodytes schweinfurthii) reveal such insights for members of the Kanyawara community in Kibale National Park, Uganda. Our objective is to see if such data yield useful perspectives for future census work on unhabituated chimpanzees, that is, what can scats tell us about a wild study population, beyond diet? We followed ten adults from this community, as well as travelling parties, comparing observed vs...
April 4, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28342054/tube-task-hand-preference-in-captive-hylobatids
#3
Luca Morino, Makiko Uchikoshi, Fred Bercovitch, William D Hopkins, Tetsuro Matsuzawa
The link between laterality in humans and other primates is still hotly debated. Hylobatids have been rather neglected in this research area, yet they can provide important insights because: (1) they share with humans a complex vocal repertoire, which in humans is thought to be associated with brain hemispheric specialization and lateralized behaviors; (2) their adaptation to arboreality has produced unique postural constraints; (3) the little that is known about laterality in gibbons is contradictory (captive studies have provided conflicting results, while a field study on siamangs reported a population-level left-hand preference)...
March 24, 2017: Primates; Journal of Primatology
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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/27942982/primates-social-impact-award-2016
#16
EDITORIAL
Tetsuro Matsuzawa
No abstract text is available yet for this article.
January 2017: 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.
January 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27858172/an-introduction-to-primate-conservation-edited-by-serge-a-wich-and-andrew-j-marshall-a-review-oxford-university-press-published-2016-pp-251
#18
Kimberley J Hockings
No abstract text is available yet for this article.
January 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27848158/evidence-of-prolonged-torpor-in-goodman-s-mouse-lemurs-at-ankafobe-forest-central-madagascar
#19
Marina B Blanco, Andon'ny A Andriantsalohimisantatra, Tahiry V Rivoharison, Jean-Basile Andriambeloson
The small-bodied mouse lemurs of Madagascar (Microcebus) are capable of heterothermy (i.e., torpor or hibernation). The expression of these energy-saving strategies has been physiologically demonstrated in three species: M. berthae, the pygmy mouse lemur (daily torpor), M. murinus, the gray mouse lemur (daily torpor and hibernation), and M. griseorufus, the reddish-gray mouse lemur (daily, prolonged torpor and hibernation). Additional evidence, based on radiotracking and seasonal body mass changes, indicated that mouse lemur capabilities for heterothermy extended to M...
January 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27848156/fluctuations-of-population-density-in-bornean-orangutans-pongo-pygmaeus-morio-related-to-fruit-availability-in-the-danum-valley-sabah-malaysia-a-10-year-record-including-two-mast-fruitings-and-three-other-peak-fruitings
#20
Tomoko Kanamori, Noko Kuze, Henry Bernard, Titol Peter Malim, Shiro Kohshima
We investigated the population density of Bornean orangutans (Pongo pygmaeus morio) and fruit availability for 10 years (2005-2014), in primary lowland dipterocarp forests in the Danum Valley, Sabah, Malaysia. During the research period, two mast fruitings and three other peak fruiting events of different scales occurred in the study area. The orangutan population density, estimated every 2 months by the marked nest count method, changed between 0.3 and 4.4 ind/km(2) and the mean population density was 1...
January 2017: Primates; Journal of Primatology
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