Primate Behavior and Ecology

Beyond the harem: vocal complexity in a captive gelada (Theropithecus gelada) bachelor group

This study examines derived vocal calls in a captive gelada bachelor group, finding they signal dominance and support social bonding among males, beyond their known role in male-female communication.

Copulation calls indicate fertility but do not reflect female mate competition in wild Guinea baboons

The paper examines copulation calls in Guinea baboons, finding they signal fertility but do not reflect mate competition.

Predation of small nocturnal primates (Microcebus) on Madagascar; insights into predator preferences in Andohahela National Park

The paper documents predation on mouse lemurs in Madagascar using radio-telemetry and owl pellet analysis, revealing new predator species and highlighting the underestimation of snake predation on these primates.

Diet and feeding strategies of two sympatric mouse lemurs (Microcebus) in the xeric forests of Andohahela, southeastern Madagascar

The paper examines dietary strategies of two sympatric mouse lemur species in Madagascar, finding seasonal shifts and niche differentiation despite dietary overlap.

Temperature modulates resting posture, microhabitat use, and day nesting in chimpanzees in a cool montane forest

This study shows how chimpanzees adjust their resting behavior in response to temperature changes in a cool montane forest.

Mice in the Robbers Cave: Induction of intergroup conflict in mice using the competitive Tsunahiki task

This study induces intergroup conflict in mice through a competitive Tsunahiki task, showing selective aggression toward out-group members.

Kinship, acoustic signaling, and socio-spatial structure shape shared decisions and social influence in white-nosed coatis

The paper examines how kinship, acoustic signaling, and socio-spatial structure affect decision-making and social influence in white-nosed coatis, finding that majority support and proximity to leaders shape group decisions.

Dominance hierarchies are structured similarly in females and males across primate groups

This study analyzes dominance hierarchy metrics in primates and finds no sex differences in hierarchy steepness, linearity, or directional consistency.

How Resource Heterogeneity and Social Threat Shape Intergroup Tolerance: Insights from a Spatial Agent-Based Model

This study uses a spatial agent-based model to show that resource heterogeneity and bachelor threat jointly shape intergroup tolerance by promoting aggregation and familiarity through encounter histories.

Development and social dynamics of stone tool use in wild white-faced capuchin monkeys

This study examines how white-faced capuchin monkeys develop stone tool use skills in a population with limited social learning opportunities, finding that juveniles are less proficient than adults but show stable skill development over time.

Social cues on stone tools outweigh raw material properties in wild primates

This study shows wild capuchin monkeys prioritize social cues over material properties when selecting tools for nut-cracking.

Meat acquisition skill and male reproductive success in Guinea baboons

The study investigates whether meat acquisition skill in male Guinea baboons signals quality and affects reproductive success, finding no evidence of such a link.

Development of cognition in corvids

This study reviews 47 studies on corvid cognitive development, highlighting key abilities and methodological limitations, while suggesting future research directions.

Dissecting disgust and fear in chimpanzees: From facilitation to disruption of cognitive processes

This study investigates how disgust and fear cues affect cognitive performance in chimpanzees, finding distinct temporal patterns of task modulation by pathogen and predator-related stimuli.

Post-mortem infant-directed behaviours in wild Guinea baboons

The paper reports post-mortem infant-directed behaviors in wild Guinea baboons, finding that caretaking and cannibalism occur without evidence of a death concept.

Early life adversity shapes adult behavior in a free-ranging primate

This study examines how early life adversity affects adult behavior in free-ranging rhesus macaques, finding that ELA correlates with increased aggression, reduced grooming, and submissive behaviors.

Primate Prosocial Behaviour as Socially Gated Action Selection

This paper reframes prosocial behavior in primates as socially gated action selection, showing how different task variables generate various prosocial outcomes through a computational model.

Planning in Nonhuman Primates Emerges from Structure Knowledge and is Distinct from Attention, Working Memory, Effort Control, and Learning

This study shows that planning in non-human primates is a distinct cognitive ability separate from working memory, attention, and learning.

CapuchinAI: Leveraging AI to study wild primate cognition

CapuchinAI enables AI-mediated cognitive testing in wild capuchin monkeys, demonstrating rapid habituation and learning with a touchscreen-reward system.

Influence of vegetation structure on lemur recolonization of post-fire habitats in northwestern Madagascar

This study examines how fire affects lemur habitats in Madagascar by analyzing vegetation structure and tree species richness, finding that lemur diversity is strongly linked to tree diversity and canopy complexity.

Causal Dynamics of Social Gaze in Primate Prefrontal-Amygdala Networks Revealed by Dynamic Bayesian Modeling

The paper uses dynamic Bayesian modeling to uncover causal interactions in primate prefrontal-amygdala networks during social gaze, revealing directional influences between brain regions.

A Social Affordance Framework for Understanding Approach Decisions in Wild Crested Macaques (Macaca nigra)

This study examines how social affordances influence approach decisions in wild crested macaques, finding that behavioral cues and subgroup composition affect interaction opportunities.

Beyond paternal care: career stage and reproductive opportunities shape male services in vervet monkeys

This study examines male services in vervet monkeys, finding that certain behaviors predict mating success, supporting reputation-based partner choice as a driver of cooperation.

Species-level variation in primate social behavior is correlated with climate extremes and variability

The paper examines how primate social behaviors, specifically group size and grooming time, correlate with climate extremes and variability across species.

Social or non-social? An exploratory approach to study inequity aversion in primates

This study investigates inequity aversion in primates by distinguishing between social and individual forms through task-based experiments with macaques and capuchins.

Ecological plasticity explains the distribution of sympatric and allopatric mouse lemurs (Microcebus spp.) in northeastern Madagascar

The paper examines ecological drivers of distribution in four mouse lemur species, finding niche size, habitat adaptability, and heterothermy influence sympatric and allopatric ranges.

An Automated Wireless Seesaw System Enabling Spatial Separation of Action and Reward in Group-Housed Marmosets

The paper introduces an automated wireless reward delivery system for marmosets to study social behavior while maintaining group housing and minimizing human intervention.

Monkey hear, monkey do what? An application of Automated Behavioural Response systems for hypothesis testing in the worlds smallest monkey

This study uses Automated Behavioural Response systems to test hypotheses about pygmy marmoset responses to predator and human sounds, finding they react strongly to avian calls but less to human speech.

Sources of Variation in Fecal Haptoglobin in a Population of Wild Capuchin Monkeys (Cebus imitator)

This study validates fecal haptoglobin as a biomarker of inflammation in wild capuchin monkeys and finds environmental factors, not demographic or circadian variables, influence its concentrations.

Structure and Variation in Dam-Daughter Bonds in Captive Rhesus Macaques

The paper identifies eight distinct dam-daughter relationship types in rhesus macaques based on grooming, spatial closeness, and agonistic support behaviors, showing demographic factors influence these behaviors differently.