5 Works

Data from: Differential aging trajectories in motivation, inhibitory control and cognitive flexibility in Barbary macaques (Macaca sylvanus)

Eva-Maria Rathke & Julia Fischer
Across the life-span, the performance in problem-solving tasks varies strongly, due to age-related variation in cognitive abilities as well as the motivation to engage in a task. Nonhuman primates provide an evolutionary perspective on human cognitive and motivational aging, as they lack an insight into their own limited lifetime, and aging trajectories are not affected by customs and societal norms. To test age-related variation in inhibitory control, cognitive flexibility, and persistence, we presented Barbary macaques...

Urinary suPAR: a non-invasive biomarker of infection and tissue inflammation for use in studies of large free-ranging mammals

James Higham, Christiane Stahl-Hennig & Michael Heistermann
Studies of large free-ranging mammals incorporating physiological measurements typically require the collection of urine or faecal samples, due to ethical and practical concerns over trapping or darting animals. However, there is a dearth of validated biomarkers of immune activation and inflammation that can be measured non-invasively. We here evaluate the utility of urinary measurements of the soluble form of the urokinase plasminogen activator receptor (suPAR), for use as a health marker in studies of wild...

Unconditional care from close maternal kin in the face of parasites

Clémence Poirotte & Marie Charpentier
Several species mitigate relationships according to their conspecifics’ parasite status. Yet, such strategy of defense comes with costs of depriving individuals from valuable social bonds. Animals therefore face a trade-off between costs of pathogen exposure and benefits of social relationships. According to models of social evolution, social bonds are highly kin-biased. However, whether kinship mitigates social avoidance of contagious individuals has never been tested so far. Here, we build on previous research to demonstrate that...

Bonds of bros and brothers: Kinship and social bonding in post-dispersal male macaques

Delphine De Moor, Christian Roos, Julia Ostner & Oliver Schülke
Group-living animals often maintain a few very close affiliative relationships – social bonds – that can buffer them against many of the inevitable costs of gregariousness. Kinship plays a central role in the development of such social bonds. The bulk of research on kin biases in sociality has focused on philopatric females, who typically live in deeply kin-structured systems, with matrilineal dominance rank inheritance and life-long familiarity between kin. Closely related males, in contrast, are...

Do infants and preschoolers quantify probabilities based on proportions?

Sarah Placì, Julia Fischer & Hannes Rakoczy
Most statistical problems encountered throughout life require the ability to quantify probabilities based on proportions. Recent findings on the early ontogeny of this ability have been mixed: For example, when presented with jars containing preferred and less preferred items, 12-month-olds, but not 3- and 4-years-olds, seem to rely on the proportions of objects in the jars to predict the content of samples randomly drawn out of them. Given these contrasting findings, it remains unclear what...

Registration Year

  • 2020

Resource Types

  • Dataset


  • German Primate Center
  • University of Göttingen
  • New York University
  • Institut des Sciences de l'Evolution de Montpellier