OOIR: Observatory of International Research

Papers

(The TQCC of American Journal of Primatology is 4. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2022-08-01 to 2026-08-01.)

Article	Citations
Issue Information	34
Obituary and tributes: William Alvin Mason (1926−2023)	23
MonkeyMemoirs: Wild Life in an Amazon Wilderness By Thomas R. Defler, Vaupés, Colombia: Huacu Press, 2025. List price $40.00. (Paperback). ISBN: 979‐8‐30‐678374‐1	22
Best practices are never best: Evaluating primate conservation education programs (PCEPs) with a decolonial perspective	21
Rhesus monkey sociality is stable across time and linked to variation in the initiation but not receipt of prosocial behavior	20
First Population Assessment Report, Suitable Habitat and Ecological Corridors of the Endangered Kashmir Gray Langur Morphotype ( Semnopithecus ajax , Poc	20
Manual preference, performance, and dexterity for bimanual grass‐feeding behavior in wild geladas ( Theropithecus gelada )	19
Physiologic Consequences of Housing Adult Male Cynomolgus Monkeys (Macaca fascicularis) in Heterosexual Pairs: A Pilot Study Using Implanted Biotelemetry	17
Issue Information	17
Developmental and environmental modulation of fecal thyroid hormone levels in wild Assamese macaques (Macaca assamensis)	16
Age‐related changes in hematological biomarkers in common marmosets	16
The importance of auditory, olfactory, and visual cues for insect foraging in owl monkeys (Aotus nancymaae)	15
Radiographic Assessment of Spinal Degeneration in Vervet Monkeys ( Chlorocebus aethiops ): Prevalence, Patterns, and Relevance to Primate Aging Models	15
Assessing Gestation and Fetal Sex in Wild Assamese Macaques Using Urinary Estrogen Analysis	14
Issue Information	14
Observational approaches to chimpanzee behavior in an African sanctuary: Implications for research, welfare, and capacity‐building	14
Habitat Type and Group Identity Influence Activity Budgets in White‐Handed Gibbons ( Hylobates lar ) in Two Habitat Types in Western Thailand	13
Is Extended Lactation Nutritionally Important for the Weaning of Wild Toque Macaques, Macaca sinica? Evidence From Milk Composition	13
Postural Infant Carrying Adaptations by Wild Eastern Chimpanzees ( Pan troglodytes schweinfurthii ) With Limb Disabilities	13
Passive acoustic monitoring using smartphones reveals an alarming gibbon decline in a protected area in the central Annamite Mountains, Vietnam	12
Feeding Platforms as an Effective Strategy to Prevent the Consumption of Refuse by Urban Populations of Capuchin Monkeys (Sapajus libidinosus)	12
Wild Tibetan Macaques Use a Route‐Based Mental Map to Navigate in Large‐Scale Space	12
The social and defensive function of olfactory behaviors in a pair‐living sexually monogamous primate	11
Influence of Tourist Group Size and Behavior on Indri ( Indri indri ) Responses During Encounters in Analamazaotra Forest, Madagascar	11
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A habitat stronghold on the precipice: A call‐to‐action for supporting lemur conservation in northeast Madagascar	11
Collective Acoustics in Pan: Conserved Roots in the Evolution of Human Musicality	11
Stone Tool Use by Black‐Horned Capuchin Monkeys (Sapajus nigritus cucullatus) in an Urban Park in Londrina, Brazil	11
Dental Fluctuating Asymmetry: Environmental Factors Influencing Cayo Santiago Rhesus Macaque ( Macaca mulatta ) Dental Development	11
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Individual differences in sociocognitive traits in semi‐free‐ranging rhesus monkeys (Macaca mulatta)	10
In vitro digestion and fermentation of Japanese macaque (Macaca fuscata) food: The influence of food type and particle size	10
Does Knowledge of the Partner's Need Affect Food Sharing in Tufted Capuchin Monkeys?	10
Impacts of climate change and habitat loss on the distribution of the endangered crested capuchin monkey (Sapajus robustus)	10
Temperature and Rainfall Associate With Patterns of Parasitism in Free‐Ranging Capuchin Monkeys ( Cebus imitator )	9
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Developmental milestones in captive Galago moholi	9
Selectivity in Buttress Drumming Tree Properties Among Chimpanzees (Pan troglodytes schweinfurthii) of the Waibira Community in Budongo Forest, Uganda	9
Issue Information	9
Use of Nonhuman Primates in Periodontal Disease Research: Contribution of the Caribbean Primate Research Center and Cayo Santiago Rhesus Colony	9
Global Data From Great Ape Zoo Populations Confirm a High Prevalence of Overweight Individuals	9
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Carbon and Nitrogen Stable Isotopic Profiling of Chimpanzees and Monkeys in Kalinzu Forest Reserve, Uganda	8
Cortisol levels across the lifespan in common marmosets (Callithrix jacchus)	8
Masthead	8
Age‐Related Differences in Short Term Spatial Memory in Rhesus Macaques	8
Fifty+ years of primate research illustrates complex drivers of abundance and increasing primate numbers	8
Maternal and offspring behavior in free‐ranging Japanese and moor macaques: A comparative approach	8
Supplementation With Human Foods Affects the Gut Microbiota of Wild Howler Monkeys	8
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From Hotspots to Action: Spatial Risk and Habitat Priorities for Human–Macaque Coexistence in the Hindu Raj Mountains, Pakistan	7
Valuing Behavioral By‐Products: Evolutionary Significance of Neutrally Drifting and Exaptive Cultures in Primates	7
Teeth Baring as a Model to Understand Complex Facial Signals in a Tolerant Macaque Species	7
Variation in Maternal Effort, Activity Budgets, and Feeding Behavior in Wild Saddleback Tamarins (Leontocebus weddelli) in Northwestern Bolivia	7
Pied tamarins change their vocal behavior in response to noise levels in the largest city in the Amazon	7
Polyadic Grooming Patterns and Network in a Free‐Ranging Group of Japanese Macaques at Awajishima	7
Energetic Priorities Across the Stages of Development: Effects of Age, Sex, and Seasonal Reproduction on Activity Budgets in Verreaux's sifaka (Propithecus verreauxi)	7
Program of the Forty‐Fifth Meeting of The American Society of Primatologists	7
Using Deep Learning to Automate Orangutan Nest Detections on Aerial Images Collected With Drones	7
Capuchin monkeys' (Sapajus [Cebus] apella) categorization of photos of unknown male conspecifics suggests attention to fWHR and a dominance bias	7
Is the long‐tailed macaque at risk of extinction?	7
Influence of COVID‐19 on the emergence of stone‐tool use behavior in a population of common long‐tailed macaques (Macaca fascicularis fascicularis) in Thailand	7
Ontogenesis of sociability of wild immature capuchin monkeys (Sapajus libidinosus): Sex more than personality explains interindividual variation	7
Correction to Naïve orangutans ( Pongo abelii and Pongo pygmaeus ) individually acquire nut‐cracking using	7
Habitual ground nesting in the Bugoma Forest chimpanzees ( Pan troglodytes schweinfurthii ), Uganda	7
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Issue Information	6
Social Rank, Female Competition for Food, and Behavioral Time‐Budgets in the Golden Snub‐Nosed Monkey Rhinopithecus roxellana Multi‐Level Society	6
How individual, social, and ecological conditions influence dispersal decisions in male vervet monkeys	6
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Temperature‐Related Differences in Hair Cortisol Among Outdoor‐Housed Rhesus Macaques (Macaca mulatta)	6
Pigtail Macaque (Macaca nemestrina) Performance Differs Across Multiple Cognitive Domains in Comparison to Rhesus Macaques (Macaca mulatta)	6
Absence of Blood Chimerism in Twin Goeldi's Monkeys (Callimico goeldii): Implications for Interpreting Callitrichid Phylogeny	6

Application of a parallel laser apparatus to measure forearms and flanges of wild Bornean orangutans (Pongo pygmaeus wurmbii)	6
Validation of Body Condition Scoring as a Screening Test for Low Body Condition and Obesity in Common Marmosets (Callithrix jacchus)	6
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Linking glucocorticoid variations to monthly and daily behavior in a wild endangered neotropical primate	6
Oesophagostomum stephanostomum causing parasitic granulomas in wild chimpanzees (Pan troglodytes verus) of Taï National Park, Côte d'Ivoire	5
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Identification of potentially zoonotic parasites in captive orangutans and semi‐captive mandrills: Phylogeny and morphological comparison	5
Cover Image	5
Environmental and Temporal Effects on Vocal Activity in a Nocturnal Primate: Implications for Passive Acoustic Monitoring	5
Landscape Attributes Shape Population Density Patterns of Black and Gold Howler Monkeys ( Alouatta caraya ) Across Their Southern Range	5
Trigger of twin‐fights in captive common marmosets	5
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Investigating infant feeding development in wild chimpanzees using stable isotopes of naturally shed hair	5
Yawn Contagion and Modality‐Matching in the Female‐Bonded Society of Geladas (Theropithecus gelada)	5
Issue Information	5
Dietary flexibility of the greater bamboo lemur ( Prolemur simus ), a specialized feeder, in eastern Madagascar	5
Issue Information	5
Stable Isotopes Analysis of Black Lion Tamarins Reveals Increasing Arthropod Consumption When Fruit Productivity Decreases in Forest Fragments	5
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Effects of Social Pairing on Measurable Disease Outcomes in Hospitalized Rhesus Macaques ( Macaca mulatta )	5
Lemur Distribution in Relation to Treefall Canopy Gaps in Masoala National Park, Northeast Madagascar	5
Advancing primate surveillance with image recognition techniques from unmanned aerial vehicles	5
Avoiding Cognitive Trap in Habitat Restoration: A Case Study of the World's Rarest Primate	5
CSViewer for Analysts: II. Analytic Tools and Visualization of Founder Lineages, Social Groups, and Reproduction Dynamics of the Cayo Santiago Rhesus Macaque Colony	5
Estimation of White‐Handed Gibbon Density and Population Size in Huai Kha Khaeng Wildlife Sanctuary, Western Thailand	5
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Charles T. Snowdon (Chuck) 1941–2023	5
Assessing color cues of development, breeding status and reproductive condition in captive golden lion tamarins (Leontopithecus rosalia)	5
Is Primate Cone Ratio Variation Functional and Adaptive?	5
State‐dependent risky choices in primates: Variation in energy budget does not affect tufted capuchin monkeys' (Sapajus spp.) risky choices	5
Quantitative Analysis of the Carpal Tunnel and Its Inner Structures in Primates	5
Social and nonsocial stimuli alter the performance of bonobos during a pictorial emotional Stroop task	5
Unveiling the Evolutionary History of cis‐Andean Alouatta (Atelidae, Alouattinae) Through Mitochondrial Genomes	5
Issue Information	5
Increased physical activity is not related to markers of cardiometabolic health in two lemur species	5
Issue Information	5
Vocalizations Reveal Species Differences in Endangered Lion Tamarins (Primates, Callitrichidae)	5
The development of sex differences in play in wild white‐faced capuchins ( Cebus capucinus )	4
Heritability in the Rhesus Macaque (Macaca mulatta) Vertebral Column	4
Comparing the Performances of Chimpanzees (Pan troglodytes) and Gorillas (Gorilla gorilla gorilla) in Two Self‐Awareness Tasks	4
Sniffing behavior of semi free‐ranging Barbary macaques ( Macaca sylvanus )	4
Chimpanzee Activity and Behavioral Diversity Extends Across 24 Hours in Both Captive and Wild Settings	4
Masthead	4
Moving	4
A novel methodological approach for group classification during fission of a semi‐free‐ranging group of Japanese macaques (Macaca fuscata)	4
Contexts of Anointing Behavior in a Group of Blond Capuchin Monkeys ( Sapajus flavius ) Inhabiting an Atlantic Forest Fragment	4
Cognitive performance of grey mouse lemurs (Microcebus murinus) during a discrimination learning task: Effect of the emotional valence of stimuli	4
Insights Into Variations in the Gut Virome of Tibetan Macaques ( Macaca thibetana ) Across Wild, Captive, and Semi‐Provisioned Environments	4
Camera traps unveil demography, social structure, and home range of six unhabituated Western chimpanzee groups in the Moyen Bafing National Park, Guinea	4
Issue Information	4
Diet and seed dispersal of bearded capuchin monkeys (Sapajus libidinosus) in Brasilia National Park	4
Urinary C‐peptide and total triiodothyronine as energetic biomarkers for studies of lemurs	4
Object Manipulation and Tool Use to Access Water by Urban Robust Capuchin Monkeys ( Sapajus sp.) in Southern Brazil	4
The Earliest Known Radiation of Pitheciine Primates	4
Influence of landscape structure on previous exposure to Leptospira spp. and Brucella abortus in free‐living neotropical primates from southern Brazil	4
Development and assessment of a stair ascension challenge as a measure of aging and physical function in nonhuman primates	4
Taphonomy of harpy eagle predation on primates and other mammals	4
An effect of canopy bridges on monkey‐vehicle collision hotspots: Spatial and spatiotemporal analyses	4
Losing lemurs: Declining populations and land cover changes over space and time	4
The Importance of Sociality and Diet in Explaining Variation in the Bonobo Gut Microbiota	4
Primate conservation: A public issue?	4
Survival rates and mortality risks of Plecturocebus cupreus at the California National Primate Research Center	4
Variation in monthly and seasonal elevation use impacts behavioral and dietary flexibility in Rhinopithecus bieti	4
Food Distribution, But Not Market Forces, Predict Behavioral Social Tolerance in Rhesus Macaques	4
Review of Primates in Anthropogenic Landscapes: Exploring Primate Behavioural Flexibility Across Human Contexts, Edited by TracieMcKinney, SiânWaters, Michelle A.Rodrigues. Cham, Switzerland: S	4
Mitochondrial DNA for Phylogeny Building: Assessing Individual and Grouped mtGenes as Proxies for the mtGenome in Platyrrhines	4
Sexual Signaling and Sociosexual Behaviors in Relation to Rank, Parasites, Hormones, and Age in Male Vervet Monkeys (Chlorocebus pygerythrus) in Uganda	4
Male Infanticide in the Northern Purple‐Faced Langur (Semnopithecus vetulus Philbricki) in the Kaludiyapukuna Forest Reserve, Sri Lanka	4
Coming to the Caribbean: Eighty‐five years of rhesus macaques (Macaca mulatta) at Cayo Santiago—A rare nonhuman primate model for the studies of adaptation, diseases, genetics, natural disaster	4
Establishment and Validation of Fecal Secretory Immunoglobulin A Measurement for Intestinal Mucosal Health Assessment in Wild Lemurs	4