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Primates; Journal of Primatology

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https://www.readbyqxmd.com/read/28821975/mixed-species-groups-of-animals-behavior-community-structure-and-conservation-by-eben-goodale-guy-beauchamp-graeme-ruxton-academic-press-2017-pp-xii%C3%A2-%C3%A2-203-paperback-isbn-9780128053553-ebook-isbn-9780128093054
#1
https://www.readbyqxmd.com/read/28815382/spontaneous-cross-species-imitation-in-interactions-between-chimpanzees-and-zoo-visitors
#2
Tomas Persson, Gabriela-Alina Sauciuc, Elainie Alenkær Madsen
Imitation is a cornerstone of human development, serving both a cognitive function (e.g. in the acquisition and transmission of skills and knowledge) and a social-communicative function, whereby the imitation of familiar actions serves to maintain social interaction and promote prosociality. In nonhuman primates, this latter function is poorly understood, or even claimed to be absent. In this observational study, we documented interactions between chimpanzees and zoo visitors and found that the two species imitated each other at a similar rate, corresponding to almost 10% of all produced actions...
August 16, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28795255/learning-the-rules-of-the-rock-paper-scissors-game-chimpanzees-versus-children
#3
Jie Gao, Yanjie Su, Masaki Tomonaga, Tetsuro Matsuzawa
The present study aimed to investigate whether chimpanzees (Pan troglodytes) could learn a transverse pattern by being trained in the rules of the rock-paper-scissors game in which "paper" beats "rock," "rock" beats "scissors," and "scissors" beats "paper." Additionally, this study compared the learning processes between chimpanzees and children. Seven chimpanzees were tested using a computer-controlled task. They were trained to choose the stronger of two options according to the game rules. The chimpanzees first engaged in the paper-rock sessions until they reached the learning criterion...
August 10, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28721454/intra-individual-variation-in-hand-postures-during-terrestrial-locomotion-in-japanese-macaques-macaca-fuscata
#4
Yasuo Higurashi, Ryosuke Goto, Hiroo Kumakura
The primate hand adopts a variety of postures during locomotion. Habitually terrestrial cercopithecine primates are known to use a palmigrade posture at faster speeds to possibly mitigate stresses on the hand skeleton; however, it is unclear whether arboreal or semi-terrestrial species use a similar strategy for adjusting hand posture. Here, we explored intra-individual variation in hand contact patterns during terrestrial locomotion in the Japanese macaque (Macaca fuscata), a semi-terrestrial cercopithecine primate...
July 18, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28634668/black-and-white-snub-nosed-monkey-rhinopithecus-bieti-feeding-behavior-in-a-degraded-forest-fragment-clues-to-a-stressed-population
#5
Zhi-Pang Huang, Matthew B Scott, Yan-Peng Li, Guo-Peng Ren, Zuo-Fu Xiang, Liang-Wei Cui, Wen Xiao
Rapid global deforestation has forced many of the world's primates to live in fragmented habitats, making the understanding of their behavioral responses to degraded and fragmented habitats a key challenge for their future protection and management. The black-and-white snub-nosed monkey (Rhinopithecus bieti) is an endangered species endemic to southwest China. The forest habitat ranges from near-continuous to fragmented. In this study, we investigated the activity budget and diet of a R. bieti population that live in an isolated and degraded habitat patch at Mt...
June 20, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28620843/the-coevolution-of-play-and-the-cortico-cerebellar-system-in-primates
#6
Max Kerney, Jeroen B Smaers, P Thomas Schoenemann, Jacob C Dunn
Primates are some of the most playful animals in the natural world, yet the reason for this remains unclear. One hypothesis posits that primates are so playful because playful activity functions to help develop the sophisticated cognitive and behavioural abilities that they are also renowned for. If this hypothesis were true, then play might be expected to have coevolved with the neural substrates underlying these abilities in primates. Here, we tested this prediction by conducting phylogenetic comparative analyses to determine whether play has coevolved with the cortico-cerebellar system, a neural system known to be involved in complex cognition and the production of complex behaviour...
June 15, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28612152/harassment-of-adults-by-immatures-in-bonobos-pan-paniscus-testing-the-exploratory-aggression-and-rank-improvement-hypotheses
#7
Klaree Boose, Frances White
The immatures of many primate species frequently pester adult group members with aggressive behaviors referred to as a type of harassment. Although these behaviors are characteristic of immatures as they develop from infancy through adolescence, there have been few studies that specifically address the adaptive significance of harassment. Two functional hypotheses have been generated from observations of the behavior in chimpanzees. The Exploratory Aggression hypothesis describes harassment as a mechanism used by immatures to learn about the parameters of aggression and dominance behavior and to acquire information about novel, complex, or unpredictable relationships...
June 13, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28597332/comparing-the-use-of-live-trees-and-deadwood-for-larval-foraging-by-aye-ayes-daubentonia-madagascariensis-at-kianjavato-and-torotorofotsy-madagascar
#8
Timothy M Sefczek, Domenico Randimbiharinirina, Brigitte M Raharivololona, Joseph D Rabekianja, Edward E Louis
Aye-aye (Daubentonia madagascariensis) feeding behavior has become synonymous with deadwood foraging. However, deadwood is not always the most frequently used substrate, as some aye-ayes use live trees more often to access invertebrates. We sought to compare the frequency of aye-aye invertebrate foraging in deadwood and live trees to better understand their feeding behaviors. We followed two male aye-ayes at Kianjavato, a heavily disturbed habitat in southeastern Madagascar, from October 2013 to October 2014, and one male and one female aye-aye at Torotorofotsy, a continuous forest in eastern Madagascar, from July 2014 to December 2015...
June 8, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28585062/comparison-of-the-social-systems-of-primates-and-feral-horses-data-from-a-newly-established-horse-research-site-on-serra-d-arga-northern-portugal
#9
Monamie Ringhofer, Sota Inoue, Renata S Mendonça, Carlos Pereira, Tetsuro Matsuzawa, Satoshi Hirata, Shinya Yamamoto
Horses are phylogenetically distant from primates, but considerable behavioral links exist between the two. The sociality of horses, characterized by group stability, is similar to that of primates, but different from that of many other ungulates. Although horses and primates are good models for exploring the evolution of societies in human and non-human animals, fewer studies have been conducted on the social system of horses than primates. Here, we investigated the social system of feral horses, particularly the determinant factors of single-male/multi-male group dichotomy, in light of hypotheses derived from studies of primate societies...
June 5, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28560636/monkeys-and-mountains-in-yunnan-china
#10
EDITORIAL
Tetsuro Matsuzawa
No abstract text is available yet for this article.
July 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28500509/observations-of-termitarium-geophagy-by-rylands-bald-faced-saki-monkeys-pithecia-rylandsi-in-madre-de-dios-peru
#11
Dara B Adams, Jennifer A Rehg, Mrinalini Watsa
Geophagy, or soil consumption, has been documented in diverse animal taxa, including many primates. Physiological functions such as mineral supplementation, detoxification of secondary compounds, and antacid properties are possible causes for this behavior. We report on observations of geophagy at arboreal termitaria by free-ranging Pithecia rylandsi at La Estación Biológica Los Amigos (EBLA) in Perú between 2008 and 2015. Characteristics of geophagy events, including saki monkey behavior at the termitaria, were recorded and geochemical analyses were conducted on consumed termitaria, nearby topsoils, and unvisited termitaria...
July 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28492971/current-conservation-status-of-germain-s-langur-trachypithecus-germaini-in-vietnam
#12
Bang Van Tran, Minh Anh Nguyen, Dat Quoc Nguyen, Quan Bich Thi Truong, Andie Ang, Herbert H Covert, Duc Minh Hoang
Following the split of the silvered langurs of Indochina into two species based on molecular and phenotypic data, there is a need to reevaluate their distribution and update their conservation status. Here, we report the distribution and assess the population size of Germain's langur (Trachypithecus germaini) within its known range across Vietnam. We confirmed this species at six of seven survey sites in different habitats within three provinces in the Mekong Delta Region, including semi-evergreen forest at the Seven Mountains of An Giang Province, mangrove forest in Ngoc Hien and Nam Can Districts and Melaleuca forest in U Minh Ha National Park of Ca Mau Province, and limestone forest at Kien Luong Karst Area and semi-evergreen and evergreen forests at Phu Quoc National Park of Kien Giang Province...
July 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28484857/muscle-architectural-properties-in-the-common-marmoset-callithrix-jacchus
#13
Naomichi Ogihara, Motoharu Oishi, Ryogo Kanai, Hikaru Shimada, Takahiro Kondo, Kimika Yoshino-Saito, Junichi Ushiba, Hideyuki Okano
The common marmoset, Callithrix jacchus, is a small New World monkey that has recently gained attention as an important experimental animal model in the field of neuroscience as well in rehabilitative and regenerative medicine. This attention reflects the closer phylogenetic relationship between humans and common marmosets compared to that between humans and other experimental animals. When studying the neuronal mechanism behind various types of neurological motor disorders using the common marmoset, possible differences in muscle parameters (e...
July 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28429170/comparison-of-energy-balance-between-two-different-sized-groups-of-japanese-macaques-macaca-fuscata-yakui
#14
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...
July 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28378197/non-dietary-analytical-features-of-chimpanzee-scats
#15
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...
July 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28342054/tube-task-hand-preference-in-captive-hylobatids
#16
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)...
July 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
#17
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...
July 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
#18
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...
July 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
#19
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)...
July 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28540427/variation-in-gaze-following-between-two-asian-colobine-monkeys
#20
Tao Chen, Jie Gao, Jingzhi Tan, Ruoting Tao, Yanjie Su
Gaze-following is a basic cognitive ability found in numerous primate and nonprimate species. However, little is known about this ability and its variation in colobine monkeys. We compared gaze-following of two Asian colobines-François' langurs (Trachypithecus francoisi) and golden snub-nosed monkeys (Rhinopithecus roxellana). Although both species live in small polygynous family units, units of the latter form multilevel societies with up to hundreds of individuals. François' langurs (N = 15) were less sensitive to the gaze of a human experimenter than were golden snub-nosed monkeys (N = 12)...
May 24, 2017: Primates; Journal of Primatology
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