J. C. Beehner

Determinants of hyena participation in risky collective action

The paper investigates factors influencing hyena participation in risky cooperative fights with lions, finding social and contextual factors drive participation and benefit distribution.

Maternal effects on early-life gut microbiome maturation in a wild nonhuman primate

This study examines how maternal effects influence gut microbiome maturation in wild gelada infants during their first three years, showing differences in microbial composition between infants of first-time and experienced mothers.

Measuring salivary cortisol in wild carnivores

This study develops a non-invasive method to measure salivary cortisol in wild spotted hyenas and finds a bimodal daily rhythm, social rank effects, and aggression-related cortisol changes.

The Goldilocks Effect: Female geladas in mid-sized groups have higher fitness

The paper shows that female geladas in mid-sized groups have higher fitness due to lower infant mortality and infanticide from immigrant males.

Male-mediated maturation in a wild primate

The paper investigates male-mediated maturation in wild geladas, finding that exposure to novel males induces estrogen surges and affects female puberty timing.

High density of white-faced capuchins (Cebus capucinus) and habitat quality in the Taboga Forest of Costa Rica

The paper examines factors influencing high capuchin density in a tropical dry forest fragment, finding that water availability is more critical than forest size or disturbance.