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American Journal of Primatology

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https://www.readbyqxmd.com/read/28103408/functional-planning-units-for-the-management-of-an-endangered-brazilian-titi-monkey
#1
Sidney F Gouveia, João Pedro Souza-Alves, Bruno B de Souza, Raone Beltrão-Mendes, Leandro Jerusalinsky, Stephen F Ferrari
Conservation practices in the tropics often rely on the data available for a few, better-known species and the adoption of an appropriate spatial scale. By defining a set of landscape units that account for critical aspects of the focal species, the information available on these conservation targets can support regional conservation policies. Here, we define and classify adjacent landscapes, termed planning units, to orientate management decisions within and among these landscapes, which are occupied by an endangered flagship primate species (Coimbra-Filho's titi monkey, Callicebus coimbrai) from eastern Brazil...
January 19, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28103402/do-same-sex-mounts-function-as-dominance-assertion-in-male-golden-snub-nosed-monkeys-rhinopithecus-roxellana
#2
Pengzhen Huang, Xin He, Endi Zhang, Min Chen
It has been hypothesized that same-sex mounts can reflect the hierarchical relationship in a mounting dyad and it is widely deemed that mounting and being mounted are demonstrations of dominant and subordinate status, respectively. In this research, we aimed to test whether same-sex mounts function as dominance assertion in male golden snub-nosed monkeys (Rhinopithecus roxellana). We investigated this behavior in eight-individuals, captive all-male unit (AMU) in Shanghai wild animal park, China. Behavioral observations were conducted with a total of 1,855 mounts recorded from November, 2014 to June, 2015, during which the alpha male was replaced in the beginning of April...
January 19, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28100016/validation-of-an-enzyme-immunoassay-and-comparison-of-fecal-cortisol-metabolite-levels-in-black-and-gold-howler-monkeys-alouatta-caraya-inhabiting-fragmented-and-continuous-areas-of-the-humid-chaco-region-argentina
#3
Verónica Inés Cantarelli, Maria Amparo Perez-Rueda, Martin M Kowalewski, Gabriela F Mastromonaco, Marina Flavia Ponzio
In the last years, the study of how environmental stimuli influence the physiology and specifically the endocrinology of an organism became increasingly important, relying mainly on the quantification of glucocorticoids to monitor animal welfare. Most studies investigating cortisol levels in primates were focused on the impact of social stressors; however, a major concern for the conservation of howler monkeys is the increased habitat fragmentation led by the advancement of the agricultural frontier. We compared fecal cortisol metabolite levels (FGCM) in howler monkeys (Alouatta caraya) living in fragmented and continuous forests of the Argentine humid Chaco region, throughout the warm season (spring-summer)...
January 18, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28100010/fine-scale-genetic-structure-analyses-reveal-dispersal-patterns-in-a-critically-endangered-primate-trachypithecus-leucocephalus
#4
Weiran Wang, Meng Yao
Dispersal is a critically important life history trait of social organisms that has a major impact on the population genetic structure and social relationships within groups. Primates exhibit highly diversified dispersal and philopatry patterns, but knowledge of these patterns is difficult to obtain and usually limited to observations of a small number of focal social groups or individuals. Here, we investigated the dispersal pattern of a critically endangered colobine monkey, the white-headed langur (Trachypithecus leucocephalus), using molecular approaches, and sex-specific population genetic structure analyses at fine geographical scales...
January 18, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28095604/vocal-repertoire-of-free-ranging-black-howler-monkeys-alouatta-pigra-call-types-contexts-and-sex-related-contributions
#5
Margarita Briseño-Jaramillo, Véronique Biquand, Alejandro Estrada, Alban Lemasson
Alouatta species utter the most powerful primate vocalizations in the Neotropics and are well-known for their loud and long-lasting male howling bouts. However, the diversity of acoustic structures used in these howling bouts, as well as in non-howling contexts, and the relative contribution of the different group members to the entire vocal repertoire, needed to be explored further. This report provides the first detailed description of the vocal repertoire of black howler monkeys (Alouatta pigra), focusing on acoustic structures and contexts of emission of both loud and soft calls as well as on the contribution rate of males and females to the different call types...
January 17, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28095600/human-quarantine-toward-reducing-infectious-pressure-on-chimpanzees-at-the-ta%C3%A3-chimpanzee-project-c%C3%A3-te-d-ivoire
#6
Kim Grützmacher, Verena Keil, Vera Leinert, Floraine Leguillon, Arthur Henlin, Emmanuel Couacy-Hymann, Sophie Köndgen, Alexander Lang, Tobias Deschner, Roman M Wittig, Fabian H Leendertz
Due to their genetic relatedness, great apes are highly susceptible to common human respiratory pathogens. Although most respiratory pathogens, such as human respiratory syncytial virus (HRSV) and human metapneumovirus (HMPV), rarely cause severe disease in healthy human adults, they are associated with considerable morbidity and mortality in wild great apes habituated to humans for research or tourism. To prevent pathogen transmission, most great ape projects have established a set of hygiene measures ranging from keeping a specific distance, to the use of surgical masks and establishment of quarantines...
January 17, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28095599/minerals-in-the-foods-and-diet-of-diademed-sifakas-are-they-nutritional-challenges
#7
Mitchell T Irwin, Jean-Luc Raharison, Colin A Chapman, Randall E Junge, Jessica M Rothman
: Minerals, though needed in small quantities, are essential to metabolic processes, and deficiencies can seriously threaten health, reproduction and survival. Despite this, few studies have measured mineral composition of wild primate foods and fewer have quantified mineral intake. Here we measured the concentration of nine minerals in 75 foods of diademed sifakas (Propithecus diadema; five groups) in habitats with varying levels of disturbance at Tsinjoarivo and estimated daily intakes using focal-animal feeding data and intake rates over one year...
January 17, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28095593/automated-face-detection-for-occurrence-and-occupancy-estimation-in-chimpanzees
#8
Anne-Sophie Crunchant, Monika Egerer, Alexander Loos, Tilo Burghardt, Klaus Zuberbühler, Katherine Corogenes, Vera Leinert, Lars Kulik, Hjalmar S Kühl
Surveying endangered species is necessary to evaluate conservation effectiveness. Camera trapping and biometric computer vision are recent technological advances. They have impacted on the methods applicable to field surveys and these methods have gained significant momentum over the last decade. Yet, most researchers inspect footage manually and few studies have used automated semantic processing of video trap data from the field. The particular aim of this study is to evaluate methods that incorporate automated face detection technology as an aid to estimate site use of two chimpanzee communities based on camera trapping...
January 17, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28076653/recent-advances-in-primate-nutritional-ecology
#9
Nicoletta Righini
Nutritional ecology seeks to explain, in an ecological and evolutionary context, how individuals choose, acquire, and process food to satisfy their nutritional requirements. Historically, studies of primate feeding ecology have focused on characterizing diets in terms of the botanical composition of the plants consumed. Further, dietary studies have demonstrated how patch and food choice in relation to time spent foraging and feeding are influenced by the spatial and temporal distribution of resources and by social factors such as feeding competition, dominance, or partner preferences...
January 11, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28073165/description-of-a-new-species-of-hoolock-gibbon-primates-hylobatidae-based-on-integrative-taxonomy
#10
Peng-Fei Fan, Kai He, Xing Chen, Alejandra Ortiz, Bin Zhang, Chao Zhao, Yun-Qiao Li, Hai-Bo Zhang, Clare Kimock, Wen-Zhi Wang, Colin Groves, Samuel T Turvey, Christian Roos, Kristofer M Helgen, Xue-Long Jiang
We describe a species of Hoolock gibbon (Primates: Hylobatidae) that is new to science from eastern Myanmar and southwestern China. The genus of hoolock gibbons comprises two previously described living species, the western (Hoolock hoolock) and eastern hoolock (H. leuconedys) gibbons, geographically isolated by the Chindwin River. We assessed the morphological and genetic characteristics of wild animals and museum specimens, and conducted multi-disciplinary analyses using mitochondrial genomic sequences, external morphology, and craniodental characters to evaluate the taxonomic status of the hoolock population in China...
January 10, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28056164/analysis-of-sea-almond-terminalia-catappa-cracking-sites-used-by-wild-burmese-long-tailed-macaques-macaca-fascicularis-aurea
#11
Tiago Falótico, Noemi Spagnoletti, Michael Haslam, Lydia V Luncz, Suchinda Malaivijitnond, Michael Gumert
Nut-cracking is shared by all non-human primate taxa that are known to habitually use percussive stone tools in the wild: robust capuchins (Sapajus spp.), western chimpanzees (Pan troglodytes verus), and Burmese long-tailed macaques (Macaca fascicularis aurea). Despite opportunistically processing nuts, Burmese long-tailed macaques predominantly use stone tools to process mollusks in coastal environments. Here, we present the first comprehensive survey of sea almond (Terminalia catappa) nut-cracking sites created by macaques...
January 5, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28002878/fluid-dipping-technology-of-chimpanzees-in-como%C3%A3-national-park-ivory-coast
#12
Juan Lapuente, Thurston C Hicks, K Eduard Linsenmair
Over a 6 month period during the dry season, from the end of October 2014 to the beginning of May 2015, we studied tool use behavior of previously unstudied and non-habituated savanna chimpanzees (Pan troglodytes verus) living in the Comoé National Park, Ivory Coast (CI). We analyzed all the stick tools and leaf-sponges found that the chimpanzees used to forage for ants, termites, honey, and water. We found a particular behavior to be widespread across different chimpanzee communities in the park, namely, dipping for water from tree holes using sticks with especially long brush-tip modifications, using camera traps, we recorded adults, juveniles, and infants of three communities displaying this behavior...
December 21, 2016: American Journal of Primatology
https://www.readbyqxmd.com/read/27960033/ten-years-of-orangutan-related-wildlife-crime-investigation-in-west-kalimantan-indonesia
#13
Cathryn Freund, Edi Rahman, Cheryl Knott
Poaching for the pet trade is considered one of the main threats to orangutan survival, especially to the Bornean species (Pongo pygmaeus). However, there have been few attempts to quantify the number of individuals taken from the wild or to evaluate the drivers of the trade. Most orangutan poaching is thought to be opportunistic in nature, occurring in conjunction with deforestation for large-scale agriculture. Using data from our long-term wildlife crime field investigation program collected from 2004 to 2014, we evaluated the prevalence of orangutan poaching and its spatial distribution in and around Gunung Palung National Park, in the regencies (districts) of Ketapang and Kayong Utara, West Kalimantan, Indonesia...
December 13, 2016: American Journal of Primatology
https://www.readbyqxmd.com/read/27936282/metabolomic-data-suggest-regulation-of-black-howler-monkey-alouatta-pigra-diet-composition-at-the-molecular-level
#14
Katherine R Amato, Alexander Ulanov, Kou-San Ju, Paul A Garber
In addition to macronutrients, foods consist of a complex set of chemical compounds that can influence dietary selectivity and consumer physiology. Metabolomics allow us to describe this complexity by quantifying all small molecules, or metabolites, in a food item. In this study we use GC-MS based metabolomics to describe the metabolite profiles of foods consumed by one population of Mexican black howler monkeys (Alouatta pigra) over a 10-month period. Our data indicate that each food exhibited a distinct metabolite profile, and the average weekly intake of metabolites such as neochlorogenic acid and serotonin (5-hydroxytryptamine) was correlated with the consumption of certain plant parts...
December 9, 2016: American Journal of Primatology
https://www.readbyqxmd.com/read/27900783/chimpanzee-seed-dispersal-in-a-montane-forest-fragment-in-rwanda
#15
Rebecca L Chancellor, Aaron S Rundus, Sylvain Nyandwi
: Primate seed dispersal plays an important role in forest regeneration. It may be particularly important to anthropogenically disturbed habitats such as forest fragments. However, few studies have examined primate seed dispersal in these types of environments. Chimpanzees (Pan troglodytes) are frugivorous and large-bodied, and are therefore able to disperse both large and small seeds, making them an important seed dispersal species. We examined chimpanzee seed dispersal in Gishwati forest, a 14 km(2) montane rainforest fragment in Rwanda...
November 29, 2016: American Journal of Primatology
https://www.readbyqxmd.com/read/27889926/nutritional-ecology-of-wild-bornean-orangutans-pongo-pygmaeus-wurmbii-in-a-peat-swamp-habitat-effects-of-age-sex-and-season
#16
Erin R Vogel, Shauhin E Alavi, Sri Suci Utami-Atmoko, Maria A van Noordwijk, Timothy D Bransford, Wendy M Erb, Astri Zulfa, Fransiska Sulistyo, Wartika Rosa Farida, Jessica M Rothman
: The spatial and temporal variation in food abundance has strong effects on wildlife feeding and nutrition. This variation is exemplified by the peatland forests of Central Kalimantan, which are characterized by unpredictable fruiting fluctuations, relatively low levels of fruit availability, and low fruit periods (<3% of trees fruiting) that can last nearly a year. Challenged by these environments, large, arboreal frugivores like orangutans must periodically rely on non-preferred, lower-quality foods to meet their nutritional needs...
November 27, 2016: American Journal of Primatology
https://www.readbyqxmd.com/read/27889921/chimpanzee-uses-manipulative-gaze-cues-to-conceal-and-reveal-information-to-foraging-competitor
#17
Katie Hall, Mike W Oram, Matthew W Campbell, Timothy M Eppley, Richard W Byrne, Frans B M de Waal
: Tactical deception has been widely reported in primates on a functional basis, but details of behavioral mechanisms are usually unspecified. We tested a pair of chimpanzees (Pan troglodytes) in the informed forager paradigm, in which the subordinate saw the location of hidden food and the dominant did not. We employed cross-correlations to examine temporal contingencies between chimpanzees' behavior: specifically how the direction of the subordinate's gaze and movement functioned to manipulate the dominant's searching behavior through two tactics, withholding, and misleading information...
November 27, 2016: American Journal of Primatology
https://www.readbyqxmd.com/read/27869316/phylogeny-phylogenetic-inference-and-cranial-evolution-in-pitheciids-and-aotus
#18
Alexander Bjarnason, Christophe Soligo, Sarah Elton
Pitheciids, one of the major radiations of New World monkeys endemic to South and Central America, are distributed in the Amazon and Orinoco basins, and include Callicebus, Cacajao, Chiropotes, and Pithecia. Molecular phylogenetics strongly support pitheciid monophyly, whereas morphological analyses infer a range of phylogenies including a sister relationship between Aotus and Callicebus. We collected geometric morphometric cranial data from pitheciids and Aotus, and used cranial data for distance-based phylogenetic analysis and tests of phylogenetic signal...
November 21, 2016: American Journal of Primatology
https://www.readbyqxmd.com/read/27813145/feeding-habits-of-marmosets-a-case-study-of-bark-anatomy-and-chemical-composition-of-anadenanthera-peregrina-gum
#19
Talitha Mayumi Francisco, Karina Lucas Barbosa Lopes-Mattos, Edgard Augusto de Toledo Picoli, Dayvid Rodrigues Couto, Juraci Alves Oliveira, José Cola Zanuncio, José Eduardo Serrão, Ita de Oliveira Silva, Vanner Boere
Primates of the genus Callithrix often obtain exudates from plants of the family Fabaceae. This study characterizes the chemical composition of exudates, and the anatomy and hystochemistry of the secretory ducts in the bark of Anadenanthera peregrina (L.) Speg. var. peregrina (Fabaceae). Exudates from this tree species represent an important component of the diet of hybrid marmosets, Callithrix spp. (Primates: Cebidae). A. peregrina was selected as the focal study tree because it is the only gum tree species exploited by Callithrix groups present within five urban forest fragments in the municipality of Viçosa, Minas Gerais State, Brazil...
November 3, 2016: American Journal of Primatology
https://www.readbyqxmd.com/read/27813136/chimpanzees-routinely-fish-for-algae-with-tools-during-the-dry-season-in-bakoun-guinea
#20
Christophe Boesch, Ammie K Kalan, Anthony Agbor, Mimi Arandjelovic, Paula Dieguez, Vincent Lapeyre, Hjalmar S Kühl
Wild chimpanzees regularly use tools, made from sticks, leaves, or stone, to find flexible solutions to the ecological challenges of their environment. Nevertheless, some studies suggest strong limitations in the tool-using capabilities of chimpanzees. In this context, we present the discovery of a newly observed tool-use behavior in a population of chimpanzees (Pan troglodytes verus) living in the Bakoun Classified Forest, Guinea, where a temporary research site was established for 15 months. Bakoun chimpanzees of every age-sex class were observed to fish for freshwater green algae, Spirogrya sp...
November 3, 2016: American Journal of Primatology
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