Primate Behavior and Ecology

Social integration in temporal multiplex association networks predicts offspring survival in female Geoffroy's spider monkeys (Ateles geoffroyi)

The paper examines how social integration in temporal multiplex networks predicts offspring survival in female spider monkeys, finding positive links between social integration and offspring survival.

Tourism impacts on fecal glucocorticoid metabolites of free-ranging mountain gorillas in Bwindi Impenetrable National Park, Uganda

This study measures stress in mountain gorillas through fecal glucocorticoid metabolites and finds increased stress with higher tourism intensity and visit frequency.

Social evaluation of skilfulness in Tonkean macaques (Macaca tonkeana) and brown capuchins (Sapajus apella)

This study examines whether Tonkean macaques and brown capuchins can evaluate others' skilfulness by observing human actors opening food containers, finding they use social information about skill in their decisions.

Tsunahiki task: A newly developed group-based operant task for mice

The paper introduces a new group-based operant task for mice, showing that repeated use leads to shifts in workload toward subordinates and rank consolidation.

Ontogenic shift in the usage and function of a symbolic bird gesture

This study examines the ontogenic shift in the use of a symbolic wing-fluttering gesture in great tits, showing it functions to prompt mates to feed nestlings in adults and parents to feed fledglings.

Freely foraging macaques value information in ambiguous terrains

This study shows macaques use information-seeking as part of their foraging strategy in ambiguous terrains, with individual differences in preference for information, reward, or proximity.

Age-trajectory of mother-infant relationships in wild Assamese macaques

This study quantifies the non-linear age-trajectory of mother-infant relationships in wild Assamese macaques, finding no sex differences and a transition to independence by mid-infancy.

Young Asian elephant calves show differentiated social relationships with conspecifics

The paper examines social relationships between young Asian elephant calves and conspecific females, finding that calves form differentiated relationships with escorts who provide allomaternal care, while other females rarely interact with calves.

From kin to spatial proximity conspecifics: social network reorganisation in developing juvenile vervet monkeys

This study examines how social networks in juvenile vervet monkeys reorganize during development, showing a shift from kin-based to proximity-based interactions.

White-faced capuchins (Cebus capucinus imitator) exhibit selectivity for stone tools

The paper studies stone tool selectivity in white-faced capuchin monkeys to infer archaeological signatures of tool use in primates and humans.

Dominant baboons experience more interrupted and less rest at night

This study examines how social dominance affects sleep quality and quantity in wild chacma baboons, finding that dominant individuals experience more interrupted and less restful sleep.

Variation in cultural attitude, knowledge and individual motivational factors impact engagement and tool use in a field experiment in wild chimpanzees

The paper investigates cultural attitudes and individual differences in tool use among wild chimpanzees using a modified honey-trap experiment across three communities.

Terrain ruggedness and human activities influence the distribution of Grauer's gorillas (Gorilla beringei graueri) and eastern chimpanzees (Pan troglodytes schweinfurthii) in the Tayna Nature Reserve, Democratic Republic of Congo

The paper maps the distribution of Grauer's gorillas and eastern chimpanzees in Tayna Nature Reserve, finding that rugged terrain and human activities influence their presence.

A morphological comparison of the caudal rami of the superior temporal sulcus in humans, chimpanzees, and other great apes

The paper compares the morphology of the caudal rami of the superior temporal sulcus across humans, chimpanzees, and other great apes using quantitative measurements.

What Relative Neocortex Size Tells Us About Social Evolution

The paper examines how changes in primate brain structure, specifically subcortical and neocortex volumes, relate to social evolution through pair-living and group-living lifestyles.

Probing the limited oculomotor range of common marmosets (Callithrix jacchus)

This study quantifies the oculomotor range of head-fixed common marmosets using naturalistic stimuli, finding limited changes compared to previous studies.

Casual Versus Fractal Modularity in Mammalian Social Organisation

The paper analyzes multilevel social systems in mammals and birds, distinguishing between fractally modular and casually modular structures, and links them to neocortex size and cognitive demands.

Despotic long-tailed macaques benefit others in a group service paradigm

This study shows long-tailed macaques exhibit prosocial behavior in a group service task, preferring to help kin, supporting the dyadic interdependence hypothesis over cooperative breeding and self-domestication hypotheses.

Testing methodological and population-specific influences on the detection of Zipf's law of brevity in chimpanzee gestures

The paper detects Zipf's law of brevity in chimpanzee gestures by testing methodological and population-specific factors across three communities.

Leadership under risk: male vervet monkey's roles in group progression across high-risk terrain

This study examines male vervet monkey leadership in high-risk terrain, finding that dominant males lead more often, especially in risky contexts, suggesting cooperative service rather than paternal care.

Group social conditions and environment predict foraging behavior in wild baboons

This study examines how group social traits and climate variables predict foraging behavior in wild baboons, finding interactions between rainfall, temperature, group size, and social network density on foraging outcomes.

COSTS AND BENEFITS OF ACTING TOGETHER: A NON-HUMAN PRIMATE MODEL OF COOPERATIVE DECISION-MAKING

This study investigates cooperative decision-making in macaques using a novel paradigm, finding that they weigh the costs and benefits of cooperation based on reward contingencies.

Collective Self-Assessment in Banded Mongoose Intergroup Contests

This study finds that banded mongoose groups use collective self-assessment rather than mutual assessment during intergroup contests, escalating conflicts based on their own group strength.

Maternal glucocorticoids and behavior shape offspring developmental trade-offs in wild baboons

This study examines how maternal glucocorticoids and behavior influence developmental trade-offs in wild baboon infants, finding that low maternal capital correlates with reduced play, independence, and growth.

Influence of anthropogenic environments on the activity patterns and vigilance of Cape chacma baboons (Papio ursinus ursinus) in the Garden Route, South Africa

This study examines how different anthropogenic environments affect the activity patterns and vigilance of Cape chacma baboons, finding that human presence influences specific behaviors like vigilance and feeding without altering overall time budgets.

Climate and predation drive variation of diel activity patterns in chacma baboons (Papio ursinus) across southern Africa

First study of an aye-aye (Daubentonia madagascariensis) mother's anxiety behaviors peripartum

This study observes anxiety behaviors in a single aye-aye mother during the peripartum period, finding increased nest-building, self-grooming, and vigilance, supporting the hypothesis of anxiety-related behaviors.

Inferring the causes of animal social network structure from time-series data

This paper introduces a causal Bayesian framework to infer the causes of animal social network structure from continuous-time focal-animal sampling data.

Effects of Social Status on Reproductive Success, Physiology and Maternal Care in Socially housed Female Rhesus Macaques

This study investigates how low social status in female rhesus macaques affects reproductive success, hormone levels, and maternal care, finding lower reproductive success and altered estradiol patterns in subordinates.

Developmental trajectories of cognitive traits in meerkats match socio-ecological demands

This study tracks cognitive trait development in meerkats, finding trait-specific developmental rates and individual variation, with physical problem-solving showing consistency linked to ecological demands.